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[Backerther]

I disposed of cooling water tubes as in the pics below.
I paid a bit attentipn to the laying works not to get the tubes to vibrate or swing at higher speed for fear of the them
being off the water inlets or cooling jackets.
Should the accident take place on the water, it should be fatal to the boat running far away from the shore
on the lake.!!!
1; tied up securely not to be off the inlets which failure may "securely guide" the boat to the bottom of the lake....
2; After setting the tubes at the water inlets, the steering servo-motor platform was glued in place.
3; Settleing the tubes securely using these parts under the plllatform.
4; Laying the tubes as much neatly as possible.
5; To the water cooling jackets through the motor bracket wall, to avoid unfavorable vibration of the tubes.
6; Intermediate condition of laying the tubes.
7; Cooling water outlets
8; Needless to say, they were set on both sides of hull.
9; Port side view
10; This is a cleaning tube for water cooling tubes normally used after the sailing of the day which is very important,
      isn't it ??


Next work is supposed to enter the installing the radio gears on the platform. !!
   
   

[JimG]

The cable ties you are using on the inlet tubes are not a good idea as they can cause leaks. When done up they are not round and lead to one side of the tube not being clamped on and water under pressure can force it's way past. Some soft copper or aluminium wire wrapped twice round the tube then carefully tightened by twisting the ends together will give a good seal. You can buy tubing clips intended for the fuel lines in model aircraft which will work well.
Jim

[Backerther]

Thank you for your kind comment and I understand what you mean.
What you have mentioned I do think is theoretically true.
I have ever experienced such phenomenon under rather high pressure in my RC models like RC planes and RC boats as you said.
However, no problems could be seen in this part of usage at all from my experience.
And if a bit of water leaks should take place, it's not a major issue.
True aim of this ties is intended not to get the tubes off the water inlets.

[Backerther]

I settled a steering servo down and set a non-slip rubber for a battery not to get it to move.
The battery space is sufficient enough to move fore-and-aft, left and right for an easy ballast adjustment.
1; A servo is, of course, Futaba make for me.
2/3; Set neatly on the platform.
4; Non-slip rubber sheet was set.
5; I enables the battery to stay firmly in place together with O rubber bands.
6; An overall view.
7; Put the deck temporarily to see if everything goes well.

[derekwarner]

Kiyo......all of your images are looking toward the Aft end of the vessel...OK 
Yet you label motors and rudder L for left, but we see them on our right hand side


Is this because I live in the Southern Hemisphere  , and every thing is backwards or upsidedown?, or do the people in England see things differently to me  , or would it help if I stood on my head? 


All good fun.....


Derek

[Backerther]

Hi Derek,
Thanks for always interesting, friendly and impressive comments on my postings. !
I did not notice at all what you indicated and which is truly to the point.
My pics in the past might have you confused a bit at a glance of the pics in which
L or R were written. 




"All crews!, make bow saying sorry to Derek"

Kiyo from the north hemisphere

[Backerther]

I made a pair of screw prop ass'ies using 3mm dia brass rods as orininal prop shafts in the kit came too short for my motor arrangement.
I did hardly follow the instruction manual concerning the power system partly
because I had changed the motors to Mabuchi RS540SH from RE280 class motors in the kit.
1; I made the thread on one end of 3mm brass rod a bit poorly.    The kit shaft is 3.17mm dia which became too short for my configuration of the power system.
2; Screw props I adopted were 34 mm dia 3 bladed while the kit props were 31mm 2 bladed.
3; "New props" were modified a bit to suit for the new 3mm rods.
4; Assembling the ass'ies of screw props.
5; I made two pieces of plastic washers out of thick sheet as there were no stocks in my part box.
6;CW and CCW

[Backerther]

I installed the screw props in the stern tubes to see if they revolve properly
i.e. they are calm and smooth when rotating at mimimum voltage by dry cell.
I used 1.2v Nimh for about 10 seconds since no lubrication had been made inside
the tubes at all. Just a short test if they should go well as a substantial test will be made when all is up with a full lubrication on the work bench.

1; Left motor showed 1200RPM with a 1.23V battery.  Smooth with no irregular sound
2; Right motor 1100 RPM with a slight vibration by the bad thread drilled by my poor skill....
 A bit of irregular sound that must be improved somehow later.
3; CW and CCW
4/5/6; Profiles are not bad....

Right prop shaft is supposed to re-make again by precisely threaded possibly.

[Backerther]

Everything has come here successfully but come up a little problem due to new props which are larger than kit-furnished ones greatly....
Therefore I was obliged to cut a bit of the rudders not to disturb the props motion.


1; Good gracious !!!
2; Cut !!
3; Reshaped !!
4/5; Well done easily


This pla-model boat is coming to its final stage of drive system set-up started about a month ago...

[derekwarner]

So Kiyo says.......


1; Left motor showed 1200RPM with a 1.23V battery.  Smooth with no irregular sound
2; Right motor 1100 RPM with a slight vibration by the bad thread drilled by my poor skill....

No Kiyo,.....not your bad skill....

Brushed motors by manufacture [are usually] designed to be singular direction...so the carbon brush holders are offset by a few degrees to the axis of the armature

This can result in a motor with reversed to normal polarity, providing such a small difference in the presentation of the axis of carbon brush to the direction of the armature, with the resultant [lower] variation of speed

You will find, with accurate electronic test equipment, that the motor with the lower speed is actually drawing marginally higher current  and the greater noise is an arc sound between the brushes & the comuntenator


In earlier brushed motors, a two speed function was attained by having 3 pairs of brush sets, one pair normal at 180 degrees, then the 3rd pair set at an angle +/- 180 degrees. The +/- offset pair was the starting function with higher current, then at speed, switched over to the 180 degree offset pair of brushes which consumed lower current


I think one of the German MARX Hectoperm/Monoperm/Pile range of model motors from the 70's had this "3 pair of brush sets' as standard feature  .??

Derek

[Backerther]

Derek;


Thank you for kind and informative comment which is very specialised information to me and I didn't know it at all
up to now....
I have ever experienced such phenomenon several times so far and felt something strange. I understood the slight and irregular sound generated at my small pla-model boat under construction. 
 In reality, with a newly threaded screw shaft, the slight vibration has been largely eliminated and I felt like the sound has
also a bit decreased. The former right shaft was a slightly eccentric...
 
Again thanks, Derek


Kiyo

[Backerther]

Well, It's a final stage of set-up of power system at last. 🎵～♫～♪～♬～(^^♪
1; Drilled a square hole for short cut of servo lead through the wall.
2; Passing the hole for the linkage to the receiver
3; Neatly set up
4; Connected to ESC
5; To the receiver
6; To the lipo
7; The small pla-model boat but spacious enough to accommodate the whole power system required running
    on the large lake at daytime.
 A simple working test to follow.!!

[Backerther]

I made a brief test of to confirm if the steering angle and motor revolutions are correctly might go well.
However, motor tests were done in a limited time and the times as it is not on the water. !!
1; All up !
2; Greas was fully charged.
3; I stopped the test of high revolution at this level.  True test will be done later on the water expecting high speed.
4; Slow test was Ok with this level.
5/6; Max angle of tiller arms and rudders which are also Ok with smooth movements.


It's about the time to think of color scheme....

[Backerther]

I made a balance test in the bathtub briefly and knew the first setting was a bit front heavy.
But could fix the balance point only moving the Lipo a bit backward. Final balance has to be done and decided
after fully completed.

1; After adjusted, close to 1cm lower than planned draft line at bow.
2; The same at stern.
3; The battery came unintentionally just under the main opening at this stage.


Well, I will go to assemble the structures of upper deck like I used to do in my younger age pleasantly.

[Backerther]

Final set-up of the drive system is now complete with the adequate balance adjusted at this stage.
Building process will go into an easy and happy assembling of the pla-model boat, which I intend to enjoy the
process. 
Maiden voyage is.......is.......around mid-October???  The season of the north wind is the best to run on our local lake.


But I dislike very much such the north wind for my tiny Chris craft Constellation as to get the RC boat to jump like a flying fish even in October.

[Backerther]

Here are the latest update of what I call pla-model assembly. The pics show only temporary fitting to see how the parts go
well for final assemlies after painting. I have to check them carefully enough at this stage before painting.
All the rest is just painting works which must not be hastened to do as it will be the last and one of the most important
jobs which is not to be failed...!!!! Or the result and jobs in the past are miserable and desperate for this project.
I'm going to take sufficient time in color scheme study and the subsequent painting works.
With the addition of swimmer's deck at transom, overall length has exceeded 80cm (31.5inches).

[Backerther]

It's been difficult to find the best weather for painting to do outdoors in these days here....
Instead, I did a very simple but effective and cruel surgery to the legs of the crew today to get him to sit on
properly the captain's seat. The result?....>> Certainly yes, of course, everything went well as seen below.
1; His legs were tooo long for his height though he is possibly scaled down to 1/18......
2/3/4/5; I made a surgery operation to the parts for getting him to grip the wheel properly....He looks happy as
          he could come to grip the wheel comfortably neatly sitting on the seat, couldn't he?
6; I also get a co-captain to sit beside him for safe sailing?  But I am really wondering if I should seriously get her
     aboard the boat as she is..???
7/8/9/10; Temporary fitting to see how they look in the helm deck... Fundamentally OK to me at this level.

[Backerther]

Yes, !! This is truly a pla-model boat. !!   
I painted a gloss red but just it looks too glossy for me....That's why this is a pla-model...
I'll leave it as it is over two or three whole days for a complete dry.

[Backerther]

I could happily find the time to work with my Chris craft Constellation today and polish her intensively before gluing the upper
deck onto the hull.
Under present pace of building the boat, maiden voyage is likely to take place in mid- November when my favorite north wind
could be expected to blow...???

[Backerther]

I just painted simulated plate color of chrome silver for the stanchions and the like for my Constellation as trial before
true paint works.
The result ..??? is so so for me as usual. 


The anchor in the pic is silver.

[Backerther]

Rough image of my Constellation has come up with these pics.
I just put together temporarily the parts already painted as of today to see how she looks... so so....??

[Backerther]

Hi all !
Allow me to introduce my wonderful mates aboard the Constellation 1/20 to you hereby.
As of today, 4 mates applied for my recruit to work aboard the classical boat of Chris craft.

[Backerther]

The main hull is nearly complete at last.....   The main deck was glued permanently to the hull.!!

Slow but steady....??     "Slow and steady wins the race??" My pace of building is tooooo slow like a snail..

[Backerther]

Pics for today are cabin assembly under construction like to glue window glasses, curtains and sunshades.

[Backerther]

I glued some little fittings around the hull today. They are mainly chrome-plated parts by which the model has become
a bit realistic and generated an atmosphere of classical Chris craft Constellation....??