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PostPosted: 31 May 2013, 22:17 
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Joined: 28 May 2013, 12:47
Posts: 22
Location: Stellenbosch
Hello everyone, I don't know if this is completely appropriate for the SAAF Forum, but it has to do with model building!! And everyone here loves it!


Here you will find the whole building process of my RC tank, where it began as an idea to sheets of plywood to a fully functional R/C tank. It took me about 6 months to complete, working on it whenever I got the time. Feel free to comment and ask questions!!


Here it is all finished Weight : 12.5 kg scale : 1/12


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The real deal.


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Where I got most of my measurements. Its an old War machine Magazine (War Machine Magazine No.1 Leopard Tank,Armed Forces of Oman,Tank Fire Control)


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Drawing everything to the right scale on the back of an old Ron Belling poster :smt023


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The rear drive-train of the tank. Two 12V cordless drill motors, each with their planetary gearbox. Angle grinder gears to deliver the power to the drive sprockets, which I machined on a lathe to press-fit into each other.


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Steel swingarms custom bent at an engineering shop. (I bent the first one myself to use as a sample)


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Plastic track pads, and chain track assembly. All the track pads where cut out with a jigsaw, and bolted together. A very, very, very tedious process .


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Cutting my wheels on a lathe. I enjoyed working on the lathe a lot, but after wheel number 16 I was happy to be finished.


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Each wheel has two ball bearings, press fitted into the bearing cavity with a spacer in between. The bearings are held on the shaft by using a punch to make a small indentation right next to it, due to the fine tolerances of the bearings, they wont go anywhere. The tank has a total of 36 ball bearings, they where quite expensive due to the odd size I used.


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Turret and upper hull, all constructed out of model grade plywood 5mm and 3mm. Cardboard templates where first made for all the panels, to get the fit just right.


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The 2 drill trigger speed controllers with reverse, operated with servos. It took me a while to figure out how to build the cam and lever mechanism :?: :?: :idea: :mrgreen: .


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I have put in a monster of a battery, this means I can fool around much longer, and it gives my tank some weight, improving traction. Its a 7 amp-hour Pb-acid alarm battery


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Pull spring & lever suspension system working nicely.


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More posts coming shortly :smt023


Last edited by Hein223 on 29 Jan 2018, 15:00, edited 3 times in total.

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PostPosted: 01 Jun 2013, 09:20 
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Joined: 26 Sep 2009, 09:19
Posts: 3897
Location: short final 31 fullstop
:smt023 =D> =D>


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PostPosted: 01 Jun 2013, 10:44 
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Joined: 01 Apr 2012, 04:49
Posts: 2852
Location: Wellington, New Zealand
Wow!!! That is some superb work Hein! =D>

I see a picture of a Sherman in one of your photos.....that your next build!! :D


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PostPosted: 01 Jun 2013, 11:06 
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Joined: 28 May 2013, 12:47
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Location: Stellenbosch
Thanks guys :smt023

I have already built it vlamgat :wink: but its a smaller model, also not RC, just a wire control model.

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PostPosted: 01 Jun 2013, 11:10 
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Joined: 01 Apr 2012, 04:49
Posts: 2852
Location: Wellington, New Zealand
Great job Hein - what scale is the Sherman?

And more targets for flying things!! :lol:


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PostPosted: 01 Jun 2013, 11:42 
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Joined: 28 May 2013, 12:47
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Location: Stellenbosch
I approximate it to be around + - 1/16, have not yet done the math. I built the tank around the Tamiya twin gearbox :wink:


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PostPosted: 01 Jun 2013, 11:50 
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Joined: 07 Apr 2008, 11:50
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IMHO Tanks at that size need a main gun that actually shoots - has anyone ever adapted an "Airsoft" gun into a model?


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PostPosted: 01 Jun 2013, 12:15 
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Joined: 28 May 2013, 12:47
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Location: Stellenbosch
Yes Roger, will agree with you on that one. My tank with the receiver, 2 servo's and battery-pack, all in the turret, left no space for a paintball or airsoft setup. And a paintball was out of question from the start, because the barrel would be out of scale :wink: . It is the question everyone asks... "does it really shoot"


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PostPosted: 01 Jun 2013, 12:45 
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Joined: 03 Apr 2013, 18:00
Posts: 606
EPIC Build Hein. You have real skills.


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PostPosted: 01 Jun 2013, 14:06 
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Joined: 28 May 2013, 12:47
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Location: Stellenbosch
Testing all the systems, speed controllers, barrel levitation, turret rotation, and motor cooling.


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Final hand-painting of the decals and other detail 8) .


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!!FINISHED!!
To give you an idea of it's size. :mrgreen: (just right)
:mrgreen:


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Now to begin the "weathering"


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PostPosted: 01 Jun 2013, 14:21 
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Joined: 28 May 2013, 12:47
Posts: 22
Location: Stellenbosch
View the videos of my tank here. :smt023

http://www.youtube.com/watch?feature=pl ... YOaO4j3YYo

http://www.youtube.com/watch?feature=pl ... PPYalua5BE

http://www.youtube.com/watch?feature=pl ... -4CtYga8n8


Last edited by Hein223 on 01 Jun 2013, 19:53, edited 2 times in total.

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PostPosted: 01 Jun 2013, 15:53 
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Joined: 03 Apr 2013, 18:00
Posts: 606
Frikking amazing.... :shock: :shock: :shock: :shock: :shock:


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PostPosted: 01 Jun 2013, 18:55 
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Joined: 28 May 2013, 12:47
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Location: Stellenbosch
Thanks Drifter :D

A photo showing the top view of the battery, motors and drive train, speed controllers and servos and all the wiring. :mrgreen: (only one track installed)


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PostPosted: 02 Jun 2013, 09:39 
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Joined: 07 Apr 2008, 11:50
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Love the Weathering technique! \:D/ \:D/ \:D/


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PostPosted: 02 Jun 2013, 16:02 
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Joined: 28 May 2013, 12:47
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Location: Stellenbosch
And it was a lot of fun! :mrgreen:


Last edited by Hein223 on 17 Oct 2013, 22:17, edited 1 time in total.

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