Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Navy - Military - Battleships: => Topic started by: Backerther on July 03, 2022, 01:17:42 am

Title: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 03, 2022, 01:17:42 am

Hi all;
Next summer/autumn project is this plastic model kit again to be converted to RC version ,which so many Rc boaters have done so far respectively in their ways. In this sense, it's not unusual item at all.
Even for me,this will be the second to build ,though the first one is not in my hand currently and was not completed satisfactorily enough as she was built sooooo many years ago,30 years or more...???I don't remember correctly... {-)
Anyhow,I am already too old to challenge a full-fledged model ship as to need some years now as other modellers do.
Moreover,I like warship model and fast cabin cruiser model that will naturally go to MTB !! {-) O0
MTB and short time project will naturally go to plastic model...the boat is to be operated in the large lake...
The boat is much better if seaworthy....All that satisfies the afore-mentioned elements is none except ..
yes, LINDBERG 1/32 MTB PT-109 which is my conclusion this time.!! {-) {-) {-) {-) :-)) :-)) :-))
I got it yesterday and contents are as in the pics:


As for the pics below;
Grey PT-109 is the first one.
Attention to the third pic;The name of a Japanese destroyer running over the PT-109 could be read as "Yukikaze"(though not even correct Japanese characters) that is incorrect. :o :o "Amagiri" is correct.!! %) %) <*< <*< <:(

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 08, 2022, 09:15:24 am

Hi all;
This kit is not necessarily good one as compared with Italeri MTB kit generally,especially its profile.
But I was surprised to know that two stern tubes were nearly self-aligned each other with no additional adjustment. :o O0
Frankly speaking,it is troublesome to exactly align these settings for me. But this time no special work for this point. :-))
Both stern tube brackets were securely,exactly and tightly sat in the holes to hold the tubes in place with one shot
and without no adjustment.!! :-)) :D
As for this part,the work to go is only adhesion if other alignment should be OK
It should seem that this boat would be a good runner on our boating lake.....??? {-) {-)  ♩～♪～♬～(^^♪

Title: Re: Lindberg 1/32 MTB PT-109
Post by: tica on July 08, 2022, 07:13:09 pm

Looking great  :-))
I just started on a 1:20 build of the 109 before I was hit hard with Covid, still fighting the aftermaths of it  >>:-(

So please keep posting  :-)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 08, 2022, 10:33:45 pm

Hi tica;


A great thanks for your comment.
I feel so sorry about your aftermaths of covid-19 and hope you to recover from it as soon as possible to get started your
PT-109 of very large size.!! I myself rather have come to be interested in your 1/20 model very much to be posted on here
in the very near future.....??? O0 {-) :-))


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: frogman3 on July 09, 2022, 10:54:40 am

HI  KIYO  THE MTB is looking good but them prop shafts look as though they are pointing down a bit to much instead of forcein the boat forward it seems to me that at that angle it will try an lift the boat upwards but this is not critisuim of your model kiyo just an observaion
chris  :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 09, 2022, 03:35:19 pm

Hi Chris;
Nice to have your kind comment.
I don't mind of the content of your comment since thrust line of the prop shafts are indeed downward as to let us imagine
the bow -up sailing at speed. O0 {-)
The scene is just like the box art of the kit which I like.
I don't want to change the angle of the stern tubes as it is troublesome to do and other modellers of the same kits have not done so, nevertheless sailing postures of them look OK for me, not so noticeable bow-up,in a extent of common sense of the fast boats.

Thanks Chris ! :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 10, 2022, 02:13:26 am

Hi all;
As most of you know,this kit is sooo old and not so necessarily satisfactory with many parts of the contents.
But this is comparatively large as a pla-model, while humble with lesser parts as compared with Italeri kit which I think is better for RC fast runner on the lake. As I said before,this is the very reason why I chose this kit for RC runner,not a display precision model.
This boat will also be served as a regular runner on our boating lake, therefore, robustness and easy handling are both important and beneficial for me at the boating site.

I just placed major RC gears briefly to know how the boat will be balanced depending upon the location each radio gear.
This boat has to be securely water-cooled as it is supposed to run at speed normally on the water. :-)) O0
The battery seems to be placed forward playing a role of balance adjuster  :-)) ...

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 11, 2022, 12:50:05 pm

Hi all;
I got a pair of counter-rotating screw props which diameter is 36mm.
Many boaters who converted to RC version seem to have used brass props which are about 22$ each nearly the same size.
Mine is 5$ each. Appearance and texture are not good unlike brass one,but so cheap and several sizes and shapes are
ready at low cost if necessary for finding the best size of props. :-))
Strength I think is OK since I am using this type of props already with another boat.
1;CW and CCW props
2;Enlarged the 3mm hole to 3.17mm(1/8 ㏌）which is the same as the shaft of Mabuchi 540 motor
3;Kit props are 38mm dia 2-bladed
4;Temporarily fitted into the stern tubes and checked if the props were easily replaced against the rudder locations.
 Judged OK if the rudder turns sharply. {-) :-))
 

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 12, 2022, 09:58:45 am

Hi all;
Pics for today are of motor couplings.
I used a very small but stiff while a bit flexible coupling made from so called engineering plastics.
The motor is,of course, Mabuchi 540 SH normal motor which I think is suitable for pla-model boat MTB. O0 :-))
This coupling had to be enlarged at the hole to 1/8 in(3.17mm)diameter from 3.0mm to meet both motor and screw shafts.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 13, 2022, 05:03:32 am

Hi all;
In the next place,I coiled cooling water jackets around the motors tightly.
If necessary,I intend to apply metal bands additionally around the jackets to get maximum effect of tightness.
Now,the hearts of the boat are ready. :-)) :-))
Next will be ....troublesome setting inside the hull to get as silent and smooth rotation of motor as possible... O0 ;D

Pics4-6 are the experimental work of coiled water cooling jacket followed by actual running for close to about 7or 8 minutes
last June.
The result was actually confirmed and proved in the test to be OK. :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 14, 2022, 12:50:05 pm

Hi all;
In the next place,I made bulkhead motor mount.
I used a long-sleeping contour gauge to trace a V-shaped hull bottom line for an easy work to make the motor mount.
The motor mount is made from fiber wood.
1;Contour gauge I bought for RC airplane building many many years ago {-)
2;I set the gauge to trace the V-shape line
3;Transfered to the carboard
4;Then,made a template to check if it's OK
5;Finally made a bulkhead motor mount like this
6;And varnished 5 coats to secure a maximum water-proof and stiffness though the material itself is already sooo water-proof. O0

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 15, 2022, 03:32:44 am

Hi all;
Now the bulkhead motor mount is ready after dried it up perfectly.
And I fitted the motors temporarily to the mount to see how they go well.
Everything went on neatly and the mount has become sooo rigider with the motor installation than a single mount. :-)) :-))   
Then,trial fitting of the bulkhead mount was carried out in the hull. Fundamentally OKed. O0

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 16, 2022, 04:56:57 am

Hi all;
This model MTB is just reaching a kind of mountain path of the RC conversion project currently.
Alignment adjustment between motor shaft and screw shaft is always troublesome and annoying to pass through
safely,smoothly and time-saving this point of work for me. {-) O0
Especially this time ,the model boat is equipped with twin screws...


1;Bulkhead motor mount seems sitting properly on the bottom of the hull. O0
2;And I made a very brief test of motor/screw rotation at a very low 1.2V dry cell to see how they go for around ten seconds....
  :-)) They rotated calmly and smoothly with no special strange noise on both shafts with no special previous setting.! :-))
3/4;In the next place,I laid the deck on the hull to see how good accessibility into the hull is...
5/6;Accessibility seems fundamentally OK.


 The work for this day is satisfactory to me very much with no problem about the important motor-screw shaft alignment
in a comparatively short time beyond my expectation.!! :-)) :-)) :-)) ♫～♬～♬～♩～(^^♪

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Martin (Admin) on July 16, 2022, 09:58:55 am

 
That motor bulkhead looks like MDF ..... make sure it's very well sealed against water!   :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 16, 2022, 12:00:40 pm

Hi Martin;


I dooo feel awkward to say that I haven't known the correct designation of this material not only in English,but also even in Japanese until you indicated here.!!! :embarrassed: :embarrassed: :embarrassed: {-) Though I have used sometimes this material that I bought many years ago. {-) %%
According to my examination in the internet, indeeed this material seems MDF duly.
And I tested several times this material to confirm if it could be OK for motor mount by soaking it in the water for around 2 minutes or so and put it in the room. NO problem at all each time on the next days when dry. :-)) :-)) :-))
However,I applied 5 coats of urethan varnish to secure and increase water proof finally,though I don't think the mount is soaked always in the water in the hull. O0


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 17, 2022, 12:59:41 pm

Hi all;
It is about the time to make a platform for radio gears.
Unless I set the platform,I couldn't go further to build this boat. {-)
For this reason I just made simple but "vast" platforms from thick paper as templates to study general arrangement of the radio gears.
It seem there are too much space to set radio gears for me,despite of 1/32 scale boat.... :-))
And I have found the battery is playing a nice balancer by moving forward or backward largely if necessary.  :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 18, 2022, 03:57:14 am

Hi all;
And I cut the RC gear platform out from the plywood and MDF in the odds and ends box.
Then I applied urethan varnish this time too and will slightly sand the ply wood platform to get a smooth surface for a
good appearance. O0 :D


By the way,it seems to me that it has been booming here to build MTBs and MGBs very much which I think so cheerful.!! {-) {-) :-)) %% O0 :D  and enjoyable and interesting to see how others do in their respective ways here. {-) :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 19, 2022, 09:58:58 am

Hi all;
So far as this 1/32 PT-109 is supposed to sail rather fast on the water with twin powerful 540 motors,I have thought it quite necessary to give a good lubrication to the stern tubes.  For this purpose I naturally made grease tubes in the stern tubes to meet the above lubrication.
I do think it so indispensable or it had better to set the grease tubes not only for lubrication, but also for water-proof in the stern tubes,at least the boat should run faster all the time in each run for close to ten minutes or so. O0
1;I made a hole in the stern tube with a file for greasing.
2;Using a 6mm brass pipe,I cut it to make two grease tubes after drilling 4 mm holes.
3;And insert the stern tube through the grease tube aligning the hole of stern tube.
4;Then I soldered the joint parts followed by two -part epoxy-glues for maximum strength which I call hybrid bond,!! {-) O0 :D
5;Finally I set transparent tubes and color caps which were in the odds and ends. So color is different each other {-) <:(


Well, the stern tubes are now ready to be set in the hull bottom. :-)) :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 20, 2022, 06:39:06 am

Hi all;
 I checked if the grease tubes should interfere with another stuff inside the hull.

1/2;I just set the stern tubes to see how they went well in the hull and with the  radio gear platform
3/4;Then I set the deck to see if there should be any problem concerning the maintenance and easy access.
I felt it fundamentally OK. :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 21, 2022, 12:52:06 pm

Hi all;
I drilled some holes in the bulkhead to pass water-cooling silicone tubes and servo lead.
MDF was a bit hard to drill beyond my expectation..!! :o :D
1;drilled three holes
2;If necessary....like this... {-)
3;kit furnished locators that are very meaningful to decide the screw shaft setting.
4;I rounded the corners from my own imagination that the parts should have been like this,though I don't know 1/1 real ones. {-) {-) {-) :D :D ;) ;) ;)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: tica on July 21, 2022, 05:11:03 pm

Great to see some good progress over the days  :-))
I'm stuck with my 1:20 build due to extreme temperatures, 32-34°c in the workshop (No A/C in house/workshop)  and 30°c in the shade in the garden.
Off tropic: I didn't know that there were a H.C Andersen them park out side Tokyo, looking nice. I have been in Tokyo a couple of times for work and several times a year in Akita for the last 6 years, has changed job now so no more Japan for me for the time being  <:(
Keep up with the posts  8)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 22, 2022, 02:36:28 am

Hi tica and all;
So glad to have your interesting comment.
Just an off the topic for a while, which I do like the deviation for rest. {-) {-)
I 've often heard curiously in TV that many European countries,especially northern countries don't need A/conditioners normally while and because a/c is considered as the essential to have in Japan for a long time in a sense, to such an extent that
Japan has beeeen tooo hot so far. Even I have 7 A/Cs in my 3-storied very small house. :D O0
I normally switch ON of the a/c at around 33 degrees C in my work shop.


The pic is under the mid-summer with the sun at 12;00 o'clock high over me and also never less than 35degrees C perhaps.!!

Kiyo
 

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 22, 2022, 06:25:26 am

Hi all;
Well then,back onto the theme of my 1/32 PT-109,I made a routine water cooling system in this fast runner.
1/2;Drilled two holes this time to expect smooth flow of the water for the two motors. O0
3;The locations seemed best here but a deliberate care had to be taken not to interfere with tiller arm link. O0
4;I also made inlets of water from 4mm brass tube.
5;I set supports for the inlets
6/7/8;I just set the parts temporarily to see how they look.....


Fundamentally OK without interference with other stuff and could feel the water might go through the inlets to the motors. :-)) :-)) :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Stan on July 22, 2022, 08:48:53 am

HI Backerther Interesting post on this plastic to r /c operation. I have enclosed a link to my plastic to r/c operation of 596  late war Elco boat.


https://www.modelboatmayhem.co.uk/forum/index.php/topic,51992.0.html

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 22, 2022, 12:09:56 pm

Hi Stan;


A great thanks for your superb build of PT boat. It would be of a great reference to my 1/32 PT-109.
Especially,detailing works and tri-screw props look so realistic like the 1/1 real boat though I haven't ever seen it before..! {-)
Your works always have made me impressed with painstaking adherence to realise a precise scale model as much as possible. :-)) :-)) :-)) :-)) :-))


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Circlip on July 22, 2022, 08:44:29 pm

Hope to be proved wrong Backerther but I feel the positioning of the water 'scoops' are optimistic to be effective.


  Regards   Ian.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 22, 2022, 09:53:29 pm

Hi Ian;


Thanks for your interesting comment.
I do hope everything should be Ok different from your observation. {-) :-))
It's hot in UK the same in Japan as well.!


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 23, 2022, 02:59:14 am

Hi all;
I set the water cooling tubes roughly as shown to see how they go inside the hull and the result is so-so. {-)
It seems no possibility to kink even in the fast and rough run perhaps with some adequate fixing measures to secure them.
Well,most parts required to RC operation seem to be ready fundamentally and I may be possibly get into practical assemblies
with adhesives for permanent fix of them. O0

Title: Re: Lindberg 1/32 MTB PT-109
Post by: frogman3 on July 23, 2022, 08:04:16 am

NICE work Kiyo on your mtb but i see your motors are not linein up with your prop shafts or is it because you havnt glued in the motor bulkhead yet ?
chrisb  %)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 23, 2022, 11:01:18 am

Hi Chris;
Thank you for your comment.
No,I haven't glued the bulkhead mount yet.
I have only glued the prop shafts up to this day as I have been preparing some parts for RC operation.
But I feel it's about the time to fix the parts permanently as most parts are already ready for the actual assembling.
Are you OK with hot weather in UK as weather reports here in Japan have broadcast worst conditions generally
across Europe nearly every day..!!? Especially in Spain... :((
Stay safe against hot weather and covid-19.


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 24, 2022, 03:20:00 am

Hi all;
I started essentially fixing work of the parts already prepared up to this day.
First of all,stern tubes I think should come first for starting anyhow.
1;stern tubes glued precisely located.
2/3:Bottoms of grease tubes were also glued to the hull bottom to reinforce both the grease tubes and stern tubes. O0 
    This will be a part of auxiliary support for the stern tube.
4/5/6/7:Main supports for the stern tubes were made from a stuff found in the odds and ends and fixed,by which I think them well kept for continuous high speed running on the lake,perhaps.. O0 {-) :D

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 25, 2022, 12:42:34 pm

Hi all;
At last,I have come to so important stage to glue the bulkhead motor mount permanently in the hull.
This work is so annoying and troublesome to me as the mount has to be precisely glued to align with two prop shafts.
This boat is intended to run fast continuously in each run, not to say at full throttle all the way. {-) O0
1;I eliminated sharp edges of the bulkhead to make ditches of two -part epoxy flow along the ditches.
 This work was also done on the opposite side.
2;I just glued the bulkhead temporarily to check if the motors/props should run properly before greasing the stern tubes
   for the slow-test run.
3;Parmanently glued after brief test which I judged fundamentally OK
4;I painted brass color at the joint parts of grease tubes for a good looking. %%
5;I also tested to know how greasing would be easy or not over the deck. so-so.. {-) :}
As a result,the mount was securely and rigidly glued in place. :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 26, 2022, 04:57:11 am

Hi all;
After fixing the bulkhead mount in place permanently with intensive check of precise location to be in line with the screw shafts,
I made a test run briefly of the core parts for the fast RC runner to see if the core should work properly.
The points of the test were if the motors should work naturally,calmly,smoothly with no peculiar noise as well as the same values of RPM between the two motors.
I did the test only using 1.2V NiMH AA battery together with a tachometer that I have been using for RC planes for many years.
1;The core of this boat is now ready to take a brief test after a slight adjustment on a left motor location,though inclination angle of the bulkhead was nearly perfect to set.
2;The tachometer is set.
3;Left screw showed fundamentally this value,sometimes showed 2000RPM,sometimes 1800 and mean value is 1900.
4;Right screw 2000 RPM of mean value....
5/6;The core is ready at last.!! :-)) :-)) :-))
The sound of the revolution was very calm and smooth as if no load had been born and like a flying mosquito. {-) %% :-))
Oh !,yes,this is the mosquito boat,isn't it?? {-) {-) {-)

Without this good result,I could not go further ahead to build. But I am in a laughing mood currently with this core parts. :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 27, 2022, 05:28:11 am

Hi all;
The core parts were successfully built in as in the preceding report.

In the next place, I set the fore and after platforms for radio gear permanently though it was done just two-sided adhesive tapes,though tough tapes to fix. O0 {-)

Non-slip rubber sheet was glued with the two-sided tapes here too together with rubber bands,both of which are good combination to fix the battery firmly in place even when in running fast on the water.!!
I like this combination very much as it is simple,secure and easy to fix and relocate the stuff like a battery often used as a ballast. :-)) 

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 28, 2022, 12:39:01 pm

Hi all;
This is a water cooling system which I do think is essential to equip for my PT-109 to run fast with Mabuchi 540s fundamentally all the time on the water like a real MTB. O0 O0 O0
1;water inlets fixed with epoxies.
2;water cooling tubes attached to and bound around the inlets firmly. If these should fail,the boat would soon get to the bottom of the lake within a couple of minutes without doubt.  {-) {-) <:( <:( <:( O0 O0 >>:-( >>:-( :(( :(( :-X
  The same thing could be said in other points of the cooling system. {:-{ :((
3/4/5/6/7/8;All the cooling system is now complete.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 29, 2022, 09:45:26 am

Hi all;
In the next place,I set the rudder connected parts as shown.
1;Rudder helm adjustment with some aluminum sheet
2;Tiller arms and link
3/4;A rudder servo installed with two-sided tapes firmly on the vast platform. {-) O0
5;Overall layout of the rudder system
6;Around the rudders

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 30, 2022, 03:20:24 am

Hi all;
I am so happy to announce that all the drive system seems to have been installed properly and fundamentally in place this day. O0 {-) :D :-)) The rest of work will primarily be a pla-modeling which is fundamentally not my likes... :embarrassed: %% {-)
Two motors rotated properly at very low voltage like idling speed,however I did not try middle or hi speed run this time on the table for the important motors.
Both rudders moved the same amount to each side at sufficient angle.
However,more or most important is the very seaworthiness on our local lake where she is supposed to sail at fast speed from this autumn regularly,because she is just 30 inches long with low freeboards....!! O0 :D %) {:-{
I am expecting her to be a good runner with draining cooling water powerfully on both sides in our local lake... %% :-)) :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: RST on July 30, 2022, 09:19:34 am

Quote from: Circlip on July 22, 2022, 08:44:29 pm

Hope to be proved wrong Backerther but I feel the positioning of the water 'scoops' are optimistic to be effective.


  Regards   Ian.

Hi, my my Perkasa ran with similar pick-ups like that for years -no problem at all.  Since then I've tried to use the correct motor /esc for the job in the first place, but Backerther seems to want a belt and braces approach for or all the hassle of tubing and extra weight not really needed if it's sized right first.

Rich

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Circlip on July 30, 2022, 11:53:33 am

Yep, it's an old fart thing. I always preferred to know the water was circulating through the system with the prop turning and the boat restrained rather than splash and dash and fingers crossed  O0  Many roads to Rome, advise is freely offered but in the words of Dave M (FLJ) suit yourself.


  Regards  Ian.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Martin (Admin) on July 30, 2022, 12:33:29 pm

There's some very interesting thoughts about cooling model boat motors in this video, see what you think!

https://youtu.be/IXMwwzGGbOM?t=211

Title: Re: Lindberg 1/32 MTB PT-109
Post by: RST on July 30, 2022, 12:42:06 pm

Hi Iain,

You must be coming from the old days of IC engines when you need cooling when the engine is idling -you don't need it on a motor unless it's running hot at full-chat.

More alming thse days I've seen a few folk using the horrid plastic water-scoops just because they think someone designed it for a purpose so it must work.  rather than just an inch of brass tube cut at 45 deg.  My Perkasa used to go like "s**t off a well oiled shovel" all those years ago.  I've not sailed my 1:48 PT boat for a while but it couldn't really go any faster on a single 400 size motor on 7.2v without looking stupid.

...anyhow sorry Backerther we're detracting from your build!

Richard

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 30, 2022, 02:46:53 pm

Hi Rich;
Don't worry about that at all.!!!
Each person has his own experience,thought and opinion,etc about his modeling and sailing. O0
Even I have experienced RC modeling for years through and upon which I am currently enjoying RC boating.
Each modeler has his own style as to how he should successfully build his model through his ideas partly from his experience.


By the way,your Perkasa looks awesome on the water. :-))
Are you sailing the boat currently ? I would like to see her sailing in here!!! :-)) O0 O0


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on July 31, 2022, 05:32:56 am

Hi all;
Building process is moving on to the decking from today.
As for this process, water-tight is very important since especially this kit has large gap all around the detachable deck in the main deck. {:-{ :(( >>:-(
It seems water will soon come into the hull so easily during the sailing on the water, as the detachable deck or boat itself must be always exposed to continuous splash by the speed!! {:-{ :(( :-X
I glued additionally lips all around the inner edge of main deck expecting water-tight and tidy fit of detachable deck...
1/2;Additional lips added
3;Viewed from top
4/5;Breif test of water ingress though I did not expect a good result in this level of counter-measure. O0 {-)
6;The first test was OK...
7;The second test after one minute of "splash?" ..no good..as I imagined previously
The real enemy of Lindy 1/32 PT-109 might be water ingress around the deck...??? %) <*< <*< <:( 8) %%
To be continued for the counter-measure now under construction in a very routine method... {-) %%

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 03, 2022, 09:51:58 am

Hi all;


The second trial work of water leakage counter measure was done in the manner as shown in vain. {-) %% {:-{

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 04, 2022, 12:47:18 pm

Hi all;
The third counter-measure against water leakage is to change the water seal rubber and to add magnets to fix the inner
deck firmly in place,by which I intend to get a better water-tightness.
And the test is supposed to carry out after decking work is finished since it will be more practical,useful and meaningful to do.
1;Magnets fixing parts
2;New rubber seal
3;Very very old magnets found in my odds and ends box
4;Under assembly
5;Assembled
6/7;Inner deck set flush with the main deck more neatly,tightly and securely than before by the magnets, which itself will be of some assistance to the water tightness,perhaps. O0

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 05, 2022, 08:20:27 am

Hi all;
It seems high time that the deck was glued permanently on the hull,since everything appeared OK through the final checking work. O0 :-)) I used 90 min.epoxy adhesive for the better adhesion though that requires about a day complety  to cure. {:-{
But,I intend to spend about two days for curing this time. :-))
1:Underside of the inner deck was checked.
2;motor rotation,rudder movement,rudder servo installation,fixing the water tubes especially around the rudder posts,etc..
   checked seriously.
3;Ready to go.!! wishing a good result on the work.!!
4/5/6;And done at last !! %%
  Wait for two days.!! O0
 

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 06, 2022, 12:26:10 pm

Hi all;
I released the taping from the hull and shaped it up neatly for the painting work.
It is about one month since starting the assembly of Rc conversion of the pla-model boat scheduled to finish
at around this September.
It might be going on well on the schedule....and could be OK to make a maiden voyage on the lake ..?? :embarrassed: :D

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 07, 2022, 09:10:07 am

Hi all;
I made a balance test in the bath tub to know how the boat may sit on the water though all the structures on the deck
were not fixed yet but it is coming to the completion except painting. And all the crews and 20mmAAG are not on the deck at the test.
The result is so so at this stage.  O0 :-))
1/2;This intermediate balance test was made with this condition.
3/4/5/6;1 cm above the water line at stern. Of course,water outlet is sufficiently high from the water line.
7;The battery couldn't help being moved to this location to get the balance leaving a large vacant space...  {-) {-) :embarrassed:
  Though this was expected previously to some extent. {-)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 09, 2022, 06:47:09 am

Hi all;
I have just forgotten and noticed very important stuff to add to the hull..Actually real boat was really equipped with..
That is bilge keels along the chines.!!!!! So far as these are important in terms of not only rolling stability, but also seaworthiness and scale realism.
Especially,these bilge keels for a small boat like MTB will play a role like spray strips on the water contributing especially to better seaworthiness on the rough water largely.
Therefore I am trying to add the keels currently.
1/2/3;Under study how to get a good result of work...
4/5;The bilge keels of PT-109 are very similar to those of my Jupiter F-99 cruiser very much.The waves were driven out of the side by the bilge keels apparently...even on the rough water. :-))
      And I expect a good effect on the water to my PT-109 as well....
6;My first PT-109 was not equipped with the bilge keels,by which the waves out of the hull bottom stood like walls along the free board....The boat was soaked with the water thoroughly right away even at low speed..!! {-) {:-{
7/8; The chines of this Najade were well contrived and shaped to drive the water out right aside from the chines..good cruising characteristics. :-)) :-))
9;Even this 55 cm mini-Jupiter P550 has a good shape of chine to get the water out aside the hull making nice wakes.though without the bilge keels.


From the points of views mentioned above,I am trying to add better bilge keels to get my PT109 to run at speed on our lake. O0 :D

Title: Re: Lindberg 1/32 MTB PT-109
Post by: ScottW on August 09, 2022, 07:48:10 am

Although the immediate topic is technical stuff, that view looking at starboard bow of the one with green cabin roof, that is a nice image of a pretty boat.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 09, 2022, 12:28:24 pm

Hi ScottW;
So glad to have your kind comment. :-))
Over the rough waves to the goal of a wonderful RC boating. :D :embarrassed: {-)
Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 13, 2022, 07:40:17 am

Hi all;
I fixed a main switch on the stb deck making use of the original location already opened ovally.   
1;A switching rod installed.
2;A waterproof rubber attached to be installed inside the deck.
3;The rubber and switch were fixed inside the deck.
4;A suitable amount of grease added.
5;And coverd the switch hole.


This will possibly allow me a better result of waterproof function. :-)) :-))


The next is the bilge keels. :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 14, 2022, 06:48:10 am

Hi all;
And done like these with the bilge keels. O0 :-))
Well,what should I do next..?? {-) Painting will be the case,perhaps.. O0
Maiden voyage would be on coming mid-September or so..?? :-)) :-)) :-))
All crews quarters right away.!!! {-) %%

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on August 24, 2022, 11:15:37 am

Hi all;
A little progress of balancing adequately this PT-109 on the water was made finally at this time. O0 {-)
I tested the boat in the bathtub 8 times to decide which waterline would be the most suitable and scale-like to my personal image,often referring to many information in the internet.
And I decided the line as in the pics below,though which is possibly not correct to precise scale level,but I don't care for it.
More important points for me are well-balanced sitting on the water at calm wave and real running characteristics.! :-))
1/2/3;Water line decided based on these pic for a final plan
4/5/6;Final layout of the radio gears to float the boat maintaining the waterline as above.
         And CG could be expected to be lower a bit by this new layout as well. %% :-))
  At this time,nothing to do any more except painting..but it's still too hot to paint outside my hobby room... {:-{ :(( {-)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on September 11, 2022, 11:14:08 am

I could find a nice day for painting at last yesterday when was not so hot but a bit windy...
I have beeeen waiting for such a day for a long time.  :embarrassed:
I just applied only 4 coats of primer surfacer this day.
I then sanded smooth the surface of the hull with #1000 grit water paper today.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on September 19, 2022, 04:59:43 am

I made a ducted painting "device" with a fan for single use from a cardboard box to be abandoned.
The purpose is, of course, to use for air brush painting of my PT-109 boat.
The device is sooo humble and simple but useful for me for the above purpose.  {-) %% :-))
1:The device!
2;With a skylight %%
3/4;With a ducted fan to drive sprayed paint mist outdoors
5;Set like this in the room
6;Viewed from the outdoor
7;Now,shall I start the airbrushing ?
8;Some assemblies were done without being annoyed with the spray mist.


However, unprecedentedly tremendous tyhoon is coming over Tokyo in a few days,by which it has started raining.
The painting work is postponed as fars as later this week... >>:-( {:-{ <:(

Title: Re: Lindberg 1/32 MTB PT-109
Post by: ScottW on September 19, 2022, 06:26:10 am

A nice bit of practical creation there.  :-))

Since I've not been watching news for a while on account of having messy health I plugged Tokyo typhoon in to Google.

Daaaaaang!

I think it can safely be said without hyperbole that y'all have a serious situation over there.

Found this, https://www.jma.go.jp/jma/jma-eng/jma-center/rsmc-hp-pub-eg/RSMC_HP.htm (https://www.jma.go.jp/jma/jma-eng/jma-center/rsmc-hp-pub-eg/RSMC_HP.htm)

And this, https://www.japantimes.co.jp/news/2022/09/17/national/typhoon-nanmadol-rapid-intensification/ (https://www.japantimes.co.jp/news/2022/09/17/national/typhoon-nanmadol-rapid-intensification/)

Quote

“If the storm maintains this intensity as forecast, it will make landfall as one of the top five strongest storms to strike western Japan on record,” said Robert Speta, a typhoon expert who previously worked as a meteorologist in Japan. He said Nanmadol was the strongest tropical system anywhere on the planet so far this year.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on September 19, 2022, 09:19:08 am

Thank you for your comment.  :-))
I have fundamentally finished to paint the major structures as seen below.
The next is the hull which will be done after the tremendous typhoon....  O0

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on September 28, 2022, 11:19:39 am

Two-tone color painting which was peculiar to the PT109 in the Solomon theater was fundamentally done.
I just only put the major assemblies aboard the deck. Oh, really looks so dirty like the real PT109?? {-) {-) %% %% :D :embarrassed:
I just don't feel like to add weathering works on it as they have been done already.... {-) {-) {-)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 10, 2022, 11:51:30 am

General assembly is fundamentally over with these pics.
However, some detailing and more weathering painting as well as rigging works are still left to do before the maiden voyage.
Oops, indispensable 8 crews have also to be added before the sailing.!!! {-)
Simple two-tone color painting is rather difficult for me to represent realistic image of the boat as it is apt to get monotonous. :embarrassed: {-) O0 

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 12, 2022, 11:28:12 am

And I applied a simple weathering paint job to save light impression of the hull.
But to my regret, it appears to me that the pics don't show the actual impression of the model... {-) %% :o
I have watched the movie of ”PT109” frequently for reference of coloring and followed it partly. :embarrassed:

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 16, 2022, 11:35:34 am

The skipper shouted suddenly with a binocular in his hands:
"General quarters!! General quarters!! Jap Zeroes diving into us at one o'clock high south! Right away, right away!" {-) {-) %%

Title: Re: Lindberg 1/32 MTB PT-109
Post by: tica on October 16, 2022, 05:18:45 pm

Looking great  :-))
I'm hoping to be back in the workshop soon, to proceed on my PT109 1:20

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 17, 2022, 02:33:24 am

Hi tica;


Thanks a lot for your kind comment.!! :-))
I also have been following your posts on larger 1/20 Pt109 boat.!!
I suppose yours will do a very good job on the lake like the real PT109. :-)) :-)) :-))
Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 17, 2022, 11:04:04 am

Simple and brief detailing was made on the operation panel and wind shield frame. :embarrassed:

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 18, 2022, 10:41:20 am

A little progress but important and indispensable for today is this support for the main mast.
This part has not been supplied in the kit...but a comparatively large part around the main mast. {:-{ <*< :o :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 19, 2022, 03:26:00 am

This summer-autumn project that has started on previous July 2 seems to be approaching final stage.
I may be able to have a chance to make a long waiting maiden voyage in coming Nov. at the latest. O0 ok2
As this project is intended for RC conversion of pla-model kit of MTB PT109 for the sake of sailing on the large lake. O0 :-))
However, it is true to say that more the project goes on and on, more I do feel to add further detailing work on her...
This kind of feeling will sometimes invite endless-like work for me who is what I call "a RC model runner" rather than a true RC model builder.  {-) %% O0 :embarrassed:
Pics for today are simple works of rigging, railing and numbering.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 21, 2022, 09:48:59 am

My PT109 is securely approaching the day of maiden voyage together with some little detailing works day by day. {-) :D :} :-))
Some of the evidence for today...

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 22, 2022, 05:36:49 am

My PT109 is flying newly added the Stars and Stripes proudly on the mast as if all were up for the maiden trial run.. {-) O0 %%
I feel that this kind of flag will do a good job to generate some kind of scale realism for the model ship, especially simple war ship like this... O0 :D :}  In these pics, the comparatively colorful flag is really eye-catching in a monotonous colored hull. :-))


However, to my regret, cal.50 machine guns are not ready for service with this condition...  {:-{ {-)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 23, 2022, 03:46:02 am

The pics for today are the indispensable items for the cal.50 AA guns, YES! they are the ammunition belts.!!!!!! O0 :-))
Two gunners are posing with the hands on the handles of the guns without ammunitions, looking up to the sky... {:-{ <*< ;D These poses are surely something strange and contradictory for me who does never want to ignore such condition %% {-) {-)
Therefore, I made very very simple and brief ammunition belts that may look the stuffs at the distance over 1.5m. {-) ;D
These ammunition belts I think may be much better than nothing with the machine guns at least !! {-) O0 :-)) :-))
1; Something strange and contradictory...no ammunitions
2;Making use of stapler needles applied with rubber related bond to avoid the separation of each "projectile" while giving them some flexibility as the ammunition belts. :-)) 
3; Cut to shape
4; Simply painted them and simulated ammunition belts are now complete. :-)
5/6; And set the ammunition belts beside rear machine guns.
7; Front machine guns.


That's all for today.!!! :-)) :-)) :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: warspite on October 23, 2022, 12:00:26 pm

Good Mod, have you retested the waterline and stability now the crew and detailing has been added ?

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 24, 2022, 01:02:02 pm

Hi warspite;
 Thanks a lot for your kind comment and a good question always to the point.!! {-) :-))
Here are the latest pics of draught line, which I think is so so. {-) {-) O0
The last two pics were other modeler's ones(Lindberg make).
I think at least engine exhaust pipes (holes)at transom must be over the water.!!
Sailing stability will be tested in the very near future on our local lake. :-)) :-))


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 26, 2022, 06:52:09 am

My PT109 is actually complete with these pics nearly as per the kit instructions. :-))
All up weight with a Lipo battery(0.27kg) is about 2.4kg (5.3lb).
The last pic shows the main switch which is of course completely waterproof.
This summer-autumn project will be over when the boat should result in a good sailing performance as a RC MTB on our
local lake, which sailing test may take place in the very near future.!!  O0 :D
However, modifications and improvements will possibly follow even after the maiden voyage until I may feel that there is nothing to do any more concerning this boat. At this time, she is literally complete, and the project is fulfilled..!!! :-)) %%

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 27, 2022, 01:30:01 pm

I reviewed the water line and battery location to prepare for a high- speed sailing of this PT109 in the maiden voyage. O0
Stern became a bit shallower while the bow a bit deeper.
The battery location went down to the bottom of hull for maximum stability in the sailing.  :-)) :-)) :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 28, 2022, 07:38:30 am

Hi all.
It was rather windy and cold day on our local lake for maiden voyage, but I couldn't be luxurious as to choose the best weather
for RC scale boat 1/32 especially in this season.... {:-{ <:(
It's too normal for the wind to blow at around 3 m/s or more (11km/H) here in this season which is rather rough and hard for 1/32 MTB to sail very first and safely... O0 {:-{ <:( :-X
My Pt109 looked just as if she were sailing in the North Atlantic Sea in the mid-winter, though I have never been there so far at all.  {-) {-) {-)
Well then, the theme for today is as you already know maiden voyage of my PT109 1/32.
1; Set out for the maiden voyage in the rough water or I should say it trial run rather than maiden voyage...
   Water drain looked OK though even at a low speed. :-))
2; The Bilge keels I added for RC sailing seemed to have made a nice job in this pic at high speed. :-))
3; Even at low speed as well. :-))
4; Draining was also good at low speed. :-))
5; So dynamic in the rough waves and stable to maneuver. :-))
6; Set on to dive into the water like a sub.????? {-) :embarrassed: O0
7; This time, on the contrary, like a flying fish.!!!  {-) {-) O0
8; Both draining and bilge keel-effect looked OK. :-)) :-)) :-))
9; The task was nearly fulfilled under the hard conditions, and she came home safely and slowly. :-)) :-)) :-))
10; "Hey, you did a very good job in the rough conditions of the first trial run". :-)) :-)) :-))


The 3 minute-video will follow in the very near future.!!

Title: Re: Lindberg 1/32 MTB PT-109
Post by: swiftdoc on October 28, 2022, 08:32:16 am

Hi Kiyo,


I have followed your build log with great interest, it was a real pleasure. I knew that it would turn out right, well done :-))  Who did those stunning photos, was it your wife?


Regards


Arno

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 28, 2022, 03:23:28 pm

Hi Arno.


Soo glad to have your warm- hearted compliment on my trial run. %% :-)) :-)) :-))
Yes, I asked my wife to take the video recording this time too.


It was windy anyhow as you could easily imagine how strong it was from the wave in the pics below.
And the hull and 8 crews were completely drenched "to the skin" through very rough waves in continuous pitching motion.
Rear gunner was as if just taking a bath in the seat since the water had come in the half of the enclosure.!! {-) {-) {-)
However, all the crews were safe enough to be able to come back not injured, together with the hull with one part of siren lost. {:-{ 

Thanks again, Arno.


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 29, 2022, 06:31:25 am

Hi all.


Today I attached an interesting video of the test run taken place yesterday.
Anyhow everything was terrible for a "happy maiden voyage?", cold, windy, rough waves, waiting time of 1.5hours under the cold weather. {-) {-) {-) %% %% :embarrassed: <:( >:-o >>:-( :o :D :embarrassed: :-))


Please feel, imagine and enjoy the atmosphere of the spot by the sound of wave recorded throughout the video below. !!! :-)) :-)) 


https://www.youtube.com/watch?v=UgcZgVvkZIs (https://www.youtube.com/watch?v=UgcZgVvkZIs)


"The wind was too strong to start the run now, watch the wind meter..." {:-{ :(( >:-o <:(

Title: Re: Lindberg 1/32 MTB PT-109
Post by: swiftdoc on October 29, 2022, 07:35:13 am

Great footage! Now you know that the boat performs well even in rough conditions. I would have been too anxious to get out the model in such a strong wind. Well done :-)) ok2

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 29, 2022, 12:27:16 pm

A great thanks for your comment on my video, Arno.
Fortunately or unfortunately, I have been used to this kind of rough conditions from my experience as to how I should
operate the RC boat, but this time the anxiety was only that this was the first time to sail this boat.
Therefore, I did not know at all what sort of movements the PT109 would exhibit against the rough waves and strong wind previously....
Only one thing that I was anxious about was that the boat should be likely to capsize when in turn at high speed by the waves and wind accidentally... <*< O0
However, she was soo stable even in the rough conditions. Especially she hardly showed unstable rolling when in turn, while
some of other PT boats on the internet had shown very unstable turns as to touch the water surface with the decks at the angle of over 45 degrees even at calm water .. !!!!! {-)


My lipo battery this time was .27kg while the boat weight was 2.1kg. The battery could only be the ballast and I put it just on the lowest position in the hull for fear of the capsize in the windy lake.
Anyhow, it was really adventure and risky sailing in recent days, but I was a bit confident and relied on her.... {-) {-) {-) :embarrassed: :D
But I never intend to sail this boat any more in such a rough water simply because it's not interesting to RC operate.!! :-))

Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 30, 2022, 05:16:11 am

Bilge keels I added for this boat this time made an effective job apparently as I had imagined it to be so previously. :-)) :embarrassed:
You may notice the clear difference of shapes of waves driven out from the hull bottom.
The shapes of waves by the bilge keels are generally neater and sharper as well as smoothly flowed back to rear, mostly forming clear and flat arch on both sides.!  O0


1/2/3; The first Pt109 I built many years ago, without bilge keels
4/5/6/7; Present Pt109 tested two days ago, with bilge keels

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 31, 2022, 11:20:57 am

Pics for today are the pipe framework for the front gunner.
I thought this had to be added because the real boat had been set with, and it's too strange and dangerous for the gunner without the frame. {-) O0 %%
1; Something strange and dangerous...Don't you think so?
2; Made of brass and aluminum
3/4/5: Bent, painted and glued with CA and epoxies
6; Overcoming the big waves... :-)) O0 {-)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: JimG on October 31, 2022, 12:17:47 pm

The frame is to stop the gunner firing on his own crew, it forces him to raise the gun when it might point at others or the superstructure.
Jim

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on October 31, 2022, 01:40:33 pm

Hi Jim.


Thanks a lot again for teaching me of the significance of the pipe frame. :-))
I didn't know it at all, but I thought it a handrail or a body protector not to fall onto the deck accidentally....  {-) %% :embarrassed:
Meanwhile, the frame should be the case as I thought of, the shape looked so strange for me.... {-) {-) {-)
It may be called "firing angle limiter" or "firing scope limiter" which I just thought or translated after those of IJN warships of WW2.

Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 01, 2022, 05:55:04 am

I took some pics of my PT109 in commemoration of completion in the background of the kit box on which she had been actively illustrated just like the real boat.? :embarrassed: O0 {-) %% :-))
My model seemed to have shown the seaworthiness unexpectedly in the maiden voyage. {-) O0 :-))
In this sense, the trial run ended in success.!!! :-)) :-)) :-))
 A scale warship added to fast boat makes an MTB for me at this time.!!! :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 03, 2022, 08:04:04 am

Well, this time, I took many commemorative pics on the water where was soooo calm due to no wind unlike 5 days ago.!!
The surface of the lake was just like a mirror.!!! %%     Sooo suitable for the trial sailing.!!!! :-)) :-)) :-)) %% %% %%

Title: Re: Lindberg 1/32 MTB PT-109
Post by: swiftdoc on November 03, 2022, 08:25:29 am

The fourth and the sixth pictures from above are my favourites, looks just like the real one! :-)) :-)) :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 03, 2022, 11:45:29 am

Thanks a lot, Arno!!
I also do like the ones. As you imagine these pics were taken nearly from the water level and I think the pics seem to show
typical shape of Elco 80 MTB very well. :-))
Enjoying the pics of sailing and/or static scenes of the RC ships/ boats on the water is interesting, isn't it.? O0 :-)) :D


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: swiftdoc on November 03, 2022, 12:07:21 pm

Yes Kiyo, but you had to lay down on the ground to take those photos?! %% {-)  I might do the same at our club pond some day when nobody is watching me {-)  This perspective is very realistic.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 03, 2022, 02:01:34 pm

Oh, you must be joking, Arno.. {-) I just only held my camera nearly 1 cm above the water level and just pushed the switch on. {-)  I like this angle and view. :-))
This lake is just like the ocean for the RC boats so that every shot of Rc boat looks so realistic.
However, the ocean and the waves are 1/1 while my PT109 is 1/32 by which difference it's sooo hard to sail the model boats as nearly realistic as possible... {-) {-) {-) O0 O0 O0 

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 04, 2022, 10:47:20 am

It was a really really fine day yesterday for me to make the second trial run as I had already suffered an unlucky weather for the long-waited maiden voyage.... <:( >>:-( >:-o :-X
But this time, not to mention, the weather was not an issue for the test run at all. Everything was up to the performance of the boat itself. O0
After the test, I reviewed the performance of my PT109 based upon the static images carefully and FAVORABLY to me.!! {-) {-) %% :D :D


1; Draining of cooling water at starboard looked perfect. :-))
2; Draining at port side OK as well :-))  Attention to the ejected water from the hull bottom forming an impressive shape. :D
3; Effect of bilge keel looked Ok judging from the shape of sharp and neat wave flowing from the hull bottom. :-))
4; Running straight at speed of 3/4 throttle looked OK. :-))
5; Turning starboard at 3/4 throttle speed. Inclined angle looked within a safety scope and stable turning confirmed in the video. :-))
6; The same as above at port side turning. :-))
7; Hi speed running was sooo stable. :-))
8; Attention to the shape of wave at starboard like a tunnel / arch of wave or water caused by the bilge keel. O0 {-)
9; My most favorite shot :embarrassed:
10; She did a very very good job this time in the calm water. :-)) :-)) :-))


Overall impression was that she performed like and as a MTB on the water. :-)) :-)) :-))
And sailing was so calm even at 3/4 throttle on the calm water, which is indispensable for us to enjoy the sailing at our local boating site. O0 :-)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Circlip on November 04, 2022, 12:08:06 pm

Good to see the cooling system works Backerther.  O0  Can clearly see this on the calm weather photos but not apparent in the last two of reply post 84. How much throttle is requored to get them to work?


  Regards  Ian.

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 04, 2022, 01:43:46 pm

Hi Ian.


So glad to have your comment and a question.
I have not confirmed it precisely but, I think it around a half throttle.
I make it a practise to sail this PT109 well over the half throttle to enjoy realistic fast speed so that cooling water is easy to
go out of the hull sides when sailing, by which the motors are well cooled in a less than about 8-minute running even at that speed.  O0


1; Draining could be slightly confirmed at both sides.
2; Starboard draining could be seen.
3; This is possibly reduced to the half throttle for turning safely near the shore. Draining is not vigorous partly because this side is a bit up by the inclination... O0


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 05, 2022, 07:17:21 am

I uploaded a video of the second trial run into you-tube as below. ;D
Attention to the waves ejected from the hull bottom forming a tidy and long lump caused by the bilge keel. O0 %%


https://www.youtube.com/watch?v=haM7-DmXk7o (https://www.youtube.com/watch?v=haM7-DmXk7o)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: frogman3 on November 05, 2022, 08:05:13 am

HI  KIYO
your pt boat looks great on the wet stuff very realistic :-))
chrisb

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 05, 2022, 09:40:38 am

Hi Chris,


So glad to have your kind comment on my PT109.!! :-))


Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 08, 2022, 08:45:18 am

My PT109 is now fundamentally complete as a RC converted running model boat from a mere pla-model PT boat.
Final detailing that I wished to add was done with the rear gunner's firing scope limit frames as seen below.
However, more trial runs to be a truly practical RC running model as to sail on our large lake are still to continue until I am satisfied with the contents, through which she would be what I have been expecting to be as a scale fast boat and at that time this boat should be regarded as literally "COMPLETE" in my understanding.  :-)) :-)) :-)) :-)) :-)) {-) {-) {-) %% %% %%


1/2; Added firing scope limit frames in the rear gunner's seat
3; Latest midship
4; Work bench before starting to build the boat to come in the kit form.!   Covering papers of the bench is clearly white.!
5/6; Got dirty through more than 4 months building process. {-) {-) O0
7; I stripped the papers.!
8; New white papers replaced the old ones. O0
9; And she has come back on the new and clear white papers of the work bench by which she looks more beautiful.??? :-)) :-)) :-)) :-)) :-)) O0 O0 {-) {-) {-) %% %% %%

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 11, 2022, 07:37:05 am

I added an on-board V meter briefly to my PT109 for safer sailing on our lake, by which I could confirm the battery conditions whenever necessary of this fast RC boat to run on the large lake. O0 :-))
This is partly because the boat is powered by one pack of 5000mAh Lipo to run two Mabuchi 540 motors which I think is insufficient to run close to 10 minutes especially on the large lake..... {:-{ {:-{ {:-{
With this addition of the V meter, I could confirm the battery conditions at an intermediate point of 5 minuts to judge whether or not the battery should be changed.
As you easily imagine, I never and never want the battery to have been exhausted fully and suddenly on the lake like 50 m or more off the shore.!! <:( >>:-( <*< :o :o :o    However, I always make it a practise to carry a rubber made rescue boat to swell fully in less than 10 minutes.!! O0 O0 O0  I am one of experienced RC boaters to have the battery exhausted  fully in a windy and cloudy day at the large lake with my mighty Jupiter F-99 many years ago.
I was completely absorbed in the operation itself to control properly the boat in the rough waves in that time.... {:-{ {:-{ :embarrassed: :embarrassed: <:( %% {-) {-)

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 25, 2022, 08:50:03 am

I could have a very nice chance today to make the third trial run of this PT109 to check the fully stable running in terms of motor revolution and receiving of radio waves.
And the boat could successfully meet my wish perfectly which I confirmed by the video finally in addition to my eyes. :-)) :-)
The video will be shown here later but I will just post the pics of the trial run.  O0 ok2
1; Very stable and reliable running today.
2; Twin screws naturally worked stably as before.  {-)
3; Turned to starboard at high speed stably as before.
4; Cooling water drained perfectly at starboard as before.
5; The same on the port side. And the motors were well cooled by the water regardless of continuous high-speed running.
6; High speed turn is just under way.
7; A very high-speed straight run is starting.
8; Front view
9; "You did a very good job and fulfilled my wish this time completely, I did not feel any anxiety to sail on the lake at all.!" :-)) :-)) :-)) O0 {-) %%

Title: Re: Lindberg 1/32 MTB PT-109
Post by: tica on November 25, 2022, 06:37:03 pm

Looking great  :-))

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on November 26, 2022, 05:40:49 am

Hi tica,


I'm so happy to have your comment of compliment on my post.!   :-))
I have attached the video of the sailing which represents the trial run clearly and vividly rather than still images.
The boat ran so fast that camera woman and camera was sometime unable to follow the boat, by which some scenes
were terribly bad to see...even the Panasonic video camera warned the camera woman "too fast to move the camera".. {-) {-) {:-{
The largest and initial impression is that she ran so calmly even at high-speed so that motor sound could be hardly heard
in the video even when she passed the shore.  ;D O0 Due to the calmness of the motors, this boat seems hardly to represent powerful impression as compared with the high-speed capability..... {:-{ :(( {-) %% :o 

https://www.youtube.com/watch?v=R7QKh8ptwj0&t=21s (https://www.youtube.com/watch?v=R7QKh8ptwj0&t=21s)

Kiyo

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on February 14, 2024, 11:34:26 am

It was tooo hot for mid-winter around Tokyo !!!! 17degrees C !!!! :o :o %) O0 O0
Yes, of course, I went to usual lake to enjoy the sailing of PT-109 who has spent a long time not on the water,but on her
sleeping bed in my room.
The wind was 0m/s south-west which I dislike since it normally carries the dirty substance as seen in the pics... >:-o >:-o <:( <:(
To make the matter worse, such substance is apt to be a terrific cause of accident to the running boat at speed.... >:-o >>:-(

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on February 15, 2024, 08:34:09 am

In the second run this day, suddenly mishap occured to the PT-109 as seen in the pics below !!! >:-o <:( >>:-(
Something in the water might have stricken the starboard screw props in the high speed run...oh my goodness !! <:(
I noticed the loss of the props after recovering the boat safely as port side props was running normally though entangled by
the dead grass.... >>:-(


1/2; Starboard screw props lost in the water when sailing.....!!!!
      But the coupling was quite OK. {-) :-))



3; Only a few drops of water could be found in the rear compartment due to my style of water-tight measures.. :-)) :D
  Oh,don't worry about the screw props lost.
 I have still a pair of the props CW and CCW  for fear of such an accident. :-)) :-)) 
This is the military model boat actually in service. {-) %% :embarrassed:

Title: Re: Lindberg 1/32 MTB PT-109
Post by: Backerther on February 16, 2024, 11:24:58 am

It was really a breeze to replace with a pair of new props. !!
All that I did was to enlarge the holes of props to 1/8 inch (3.17mm dia.) and installed them to screw shafts. {-) :-)) :D
This is a military model boat that must be easy to maintain or repair in a usual operation.!? {-) %% O0 :-))


1;Only starboard props were lost but both props have to be replaced at the same time.!
2;Spare props in stock
3;Very very special nuts of 1/8 inch size here in Japan!!!  This model kit is made in USA in accordance with the US standard.
   Screw shafts were furnished in the US standard and I had to buy unusual size of nuts additionally for my US-made kits
later on.
4; Right one is new props, the rest is old one.
5; Both screw props were replaced in a breeze.!! :-)) :-)) :-))


Well, let's go for boating again in a very fine weather with clean water.!!!! {-) O0