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[swiftdoc]

aha, the shaft tubes sit so low in the hull that you can use the lubrication tube ends as supports, clever Kiyo

[Backerther]

Thank you so much for your compliment on my set-up of stern tubes, Arno.

[Backerther]

After fixing drive train permanently, next step is the study where to set the radio gears considering the rough balance of the hull/boat that should leave some allowance to be adjusted later to get the best and final level of balance, needless to say.


In order to set the radio gears, I made a couple of decks for them out of plywood after 3 times of brief urethan coatings. 

[Backerther]

I still have lots of Rc airplane parts I used to use for building many balsa-kit planes when I was much younger.
I have used some for the steering linkage work of this fast patrol boat. It was very easy, neat and secure to set the linkage.
I used R-clips to detach easily the rudders from the hull for a good maintenance and exchange of screw shafts, couplings and the like.

[Backerther]

And I installed a steering servo and linked with the bell crank.
So far as this is a pla-model RC conversion project, it's generally easy to go with less stress which is quite good spiritually for me, the aged RC modeller.!! One by one and step by step as a daily routine activity..!!?
What is better, the building work could be done precisely, slowly and neatly with an affluent time, as it were a snail's pace.   An old man can normally afford the time to spend whatever he wishes to do as far as he is healthy.! 
Yes, no need to hurry it up at all.

[swiftdoc]

Wise words, Kiyo   Personally being self-employed, I lack time, patience I have….
 How do you fix the servo, it should be removable in case of any malfunction ?

[Backerther]

Hi Arno,
I just simply used double-sided tape which you know well is strong enough to fix while easy to remove, not to say stronger than
epoxy or CA and the like.
The same thing could be said to a glue gun used this time for fixing the steering servo plate.
This is so called in English "Right people, right place"?  In Japanese,「適材適所」that means "Proper material, proper place"


Kiyo

[Backerther]

Next step is to set a couple of water pick-ups.
This time, I changed the shape and locations of inlets of the pick-ups as seen below different from my traditional linear type just for an experiment. Theoretically this case may be more effective to suck the water although my traditional way of setting did not
show any problems at all in the past.    Both have merit and demerit mutually as often seen in everything in life.  

[jaymac]

Why only 2Props

[Backerther]

Due to many reasons and merits of this "only 2props" for my imaginary fast patrol boat model of Japan Coast Guard.!
One of these is indispensable necessity for high speed capability as seen in the following You-tube video and proved/judged to be 100% OK by me with the "only 2props" in the video of another Lindberg boat.   Byuuuuuuunnn!
A MTB model had better be fast than slow and enjoyable to operate it on the water, especially on the large lake, hadn't it.?!

Bing 動画

[Backerther]

And cooling water tubes were set in the following style.
Water drain has to be secured the faster the boat runs, the more water the boat should drain powerfully, hasn't it ?!
In the bathtub test, the drained "water" became hot rather than warm at slow stream...   within a few minutes..
Cooling issue is very very critical and fatal especially for a fast moving vehicle unless properly done regardless of its size, isn't it.??!!

By the way, I have a good and bitter memory of the water cooling....
This may digress from the mainstream of this build log, I have ever been annoyed intensively many years before by my 1/10 scale RC nitro-powered  tank made of mainly 1mm thick steel on cruising in the mid-summer. YES, overheat problems of the engine set in the too hot circumstances with no wind flow inside the hull enclosed by hot steel body...!!!!!

However, after much thought I decided to adopt an enforced water cooling system equipped with a radiator with a fan, water tank and circulating pump. Everything was solved perfectly and the tank continued to run as far as fuel tank came out empty for 30minutes in the mid-summer day.!!!!!!!!

[Backerther]

Cooling water tubes were set and the next is to get it ready for so called bathtub test to see if the balance of the boat on the water is Ok as well as motor revolution.
For this preparation, I checked and decided the balance on the desk briefly followed by the grease filling into the stern tubes by
a grease gun. The screw shafts and stern tubes were comparatively tight in this case that very little amount of grease did OK.

[frogman3]

HI Backearther just been lookin through your build an you have done a very nice job Sir  very well done
chrisb

[Backerther]

Hi Chrisb,
So nice to see you back on MBM here with energetic posts at the same time I have felt so easy to know that you have been
fine during post-free holidays.!!

[Backerther]

And next step is....yes, to add a very very important parts for the hull to make sharp and neat waves alongside the hull especially
at speed as seen in the pics.!! 　These bilge keels have made nice jobs so far for my fast boats on the water especially at speed when steering.  

[Backerther]

So far as this is a RC powered boat to sail actually on the water, so I have thought this boat should be built to secure a good maintenance ability and any service whatever may happen in the hull.
Even the motors can be so easily removed in so short a time by this layout, needless to say.
From this point of view, I cut the rear deck out as seen below by which any service and access could be done so easily and fully.   Easy maintenance is quite important to run a RC boat sufficiently and joyfully with less frustration during very precious/enjoyable time at a boating site, isn't it.???

Under the blue sky, and on the blue and large water on which a white RC cabin cruiser sails smoothly, decently, stably, gracefully and calmly leaving so long a wake clearly....This is my own goal and intended time to build a RC model boat. 
But this is basically supported and fulfilled by a good health, needless to say.
Well then, it's about the routine time for me to hold my shape of body by running in my local gymnasium.

[Backerther]

Well, the work for today is soooooo critically important for the lake-going RC (fast) boat to sail on a rough water as seen below.    Yes, it's a water-tight process not around the hull bottom, but at the departing line between the fixed deck and the detachable deck.... Unless processed properly, the boat may encounter the fatal bad fortune as to be gone to Davy Jones's locker finally....

My second PT109 which was also well done in the water-tight process unfortunately encountered the very rough water in her maiden voyage and consequently survived the hellish trial run, however I was actually sooo anxious about the run during the operation from the bottom of my heart, frankly speaking...!!
It could be a really nice? seaworthy test for this MTB unintentionally...!!
Naturally, all the crews were completely drenched to the skin..as if they said "Oh my goodness!! Who is the skipper for today!!"

I suppose gentlemen like you here may never do so stupid/wild sailing and challenge as to drive her to go possibly to the bottom of the lake. 

[Backerther]

Next is a general assembly of drive train inside the hull at last.
Before that, I had to check and confirm if the full accessibility into the hull has been really and easily secured in the present
configuration.   Especially whether or not the motors can be replaced is vitally important for all my Rc boat models.
The motor replacement has to be done comparatively easy for this sort of fast sailers on the water, needless to say.
The balance between bow height and stern height from the water line is also so important for getting into smooth planing mode.
For getting proper balance of hull, I struggled a bit to keep it proper when laying the RC gears out as this hull has just become front -heavy condition.




 

[Backerther]

The deck was fixed at last after sufficient checking if it might be Ok to do so.
Trial run as a mere RC boat is supposed to take place in early April...??  It has been not a good weather for trial run..Windy days
have increased gradually together with spring atmosphere here in Tokyo where the Cherry blossom has come into bloom.!!!
It's 27 degrees C here in Tokyo.!!!!!!! toooo hot!! Two -part epoxy is soon to get cured.

[swiftdoc]

Your build is coming along nicely, Kiyo! I will keep my fingers crossed for the maiden voyage
27 degrees, phew, feels like summer   The cherry blossoms will not like that and deteriorate quickly….

[swiftdoc]

These are the current cherry blossoms of our tiny cherry tree in Germany, which we have planted in our garden last year.

[Backerther]

Oh!!, it' really realy cherry blossom of Germany, soo cute!!!!
It's very impressive to see such an awesome cherry blossom as yours blooming in European country like Germany.!!
Please take care of life of cherry, soo short like a week or so after full bloom and soo weak against the wind.
In this sense, I do hate this provoking wind that has also distressed me terrifically so far even in my RC model boats operations currently and RC planes previously..   

Anyway, thanks for a lovely pic of cherry, Arno.!!
Kiyo

[Backerther]

The deck has been well fixed with a thin CA and a 90minute epoxy.
I have never used Pla-model cement for larger parts of a model ship in terms of the long applying time, complicated procedures to locate each larger parts together in place as well as fixing them at a shorter time during which the cement is soon to dry leading to mal-bond and inaccurate assembly, at least in my case... I am clumsy.!!??  

Then, sailing test at very slow speed to check how she behaves on the water.!!   But not so good, to my regret.
Water cooling is not sufficient....I was so much surprised to know this unsatisfactory /unexpected malfunction since this kind of phenomenon is the very first to encounter at respective first test run made in the past.....   Behaviour was so so for the first test as previously expected.
Especially I could confirm my favorite/decent side waves as in the pics clearly at slow speed.

Anyhow, "Seeing is believing" is so significant and important whenever to make some assertions/appeals to the others and I understand this old saying is so common even in Europe..
That's why I have made it a practise to attach many photos as much as possible whenever to post here in this forum.
 

[Dean's Marine]

These are the current cherry blossoms of our tiny cherry tree in Germany, which we have planted in our garden last year.

Hi Arno & Kiyo Spring is also on it way her in the UK, suns out and some of the trees are starting to blossom out of the wind, cherries are a way off yet, but the sun bring the winds here on the fens ( flat lands) with a sharp cold edge, and not to good for boating as well. good for indoor local shows  it will soon be Easter and change will come Regards Rpn

[Backerther]

Hi Ron,
It's a great pleasure to see you unusually here in this forum apart from your company's site where I used to have a cordial hospitality on my 1/96 HMS Fencer build.
I have watched the pics in detail for which I do express my thanks, and am surprised to know that cherries have been planted
in your garden? as well as Arno's ... If so, splendid !!   This cherry is deemed to be the second National flower following a Chrysanthemum (our Emperor's flower)
Do you regularly hold such a nice show throughout a year ? I have noticed that there should be numerous RC boats clubs with club ponds which is sooo amazing for Japanese RC boaters...wow !!   It's really INCREDIBLE at all.!!!! How I envy you.!

Thanks to your release of this HMS Fencer, I could have a best chance to have a large RC carrier at last and succeeded in actual
sailing on the lake as seen in the video below.!!!! Woh-Woh !!
Thanks Ron!!
 
https://youtu.be/4f-fI3S6f1E

"A fact surpasses any theories, any argumentation and any reasoning."