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From: "chris barthelson" <barthelson88-at-hotmail.com>
Subject: Re: Down-Under StuG Photos [TANKS]
Date: Sun, 02 Apr 2006 15:52:37 +0930
Reply-To: tanks-at-rctankcombat.com

>Im going to guess how much my tank is going to weigh combat ready, divide 
>it by 16 (road >wheels) and I should get a rough estimate of how much 
>tension is needed for the springs...I >think...

This is not 100% accurate. The springs I used were more then double what I 
needed in terms of pull strength. That is because the trailing arm (attached 
to wheel) is twice the length of the arm the spring is attached too, which 
means if you apply 10lbs to the trailing arm the spring thinks it's getting 
20lbs of force. So a 20lb spring is only good for 10lbs, unless the spring 
arm is the same length as the trailing arm. So the spring is not crucial, as 
long as the spring arm is the right length you can use any spring (within 

Also if your tank weighed 100lbs and you used 16 springs (6.25lbs each) it 
would not be able to hold the tank because they are rated for 100lbs and the 
thing weighs 100lbs meaning the springs are maxed out form the beginning. I 
can not put enough weight on my tank to make it bottom out. With me standing 
on it it only moves slightly, I think the wheels would snap before the tank 
bottoms out. Yet when it moves over uneven ground the wheels all stay in 

Chris. b

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