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Tractor Pulling Discussion Forum

percentage pull formula

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Jerry Thomas

08-22-2007 12:24:32




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Hey guys went brain dead what is the formula for figuring a percentage pull.




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Formula

08-24-2007 05:34:45




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 Re: percentage pull formula in reply to Jerry Thomas, 08-22-2007 12:24:32  
To make this simple on a weight transfer sled you need to know the weight of the pan with transfer box at the back of the sled,this plus any other weightadded is your dead weight.(this example 2000#'s.The pan weight with the transfer box at the top is 10,000#'s so you are adding 8000#'s . 10,000-2000=8000. You will now need to know how many inches the weight box travels on the sled, say 200 inches.(you will need a way to measure this distance every hook) 8000# divided by 200 inches= 40# per inch of sled travel. The Formula is as follows Inches traveled x #'s per inch + dead weight divided by tractor weight.

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smart one

08-23-2007 18:59:29




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 Re: percentage pull formula in reply to Jerry Thomas, 08-22-2007 12:24:32  
it should be distance pulled timed by dead weight then divided by tractor weight
example
distance pulled 257.22
dead weight 10000
tractor weight 7360

257.22 x 10000 = 2572200
divide by 7360 = 349.48%



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smdv806

08-23-2007 19:21:38




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 Re: percentage pull formula in reply to smart one, 08-23-2007 18:59:29  
You don't do things the same way we do. We keep adding weight every round until all the tractors can't pull it anymore.



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smart one

08-23-2007 21:47:06




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 Re: percentage pull formula in reply to smdv806, 08-23-2007 19:21:38  
just wondering could you tell me how that works, does it make a difference how far someone pulls?

or do you add weight to the sled until the tractors could not pull any further, if so i would like to see that sometime, i think it might be fun to watch

sorry if i gave you something different from what you use, i got this from the paper that some of the sleds that we use



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smdv806

08-24-2007 18:53:38




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 Re: percentage pull formula in reply to smart one, 08-23-2007 21:47:06  
We have a sled that is pulled 25 ft at a time. The weight does not move. Each tractor gets 2 attempts to move the sled the entire distance. After everyone pulls the sled, more weight is added. These can take many hours sometimes but it is fun.



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Dead Weight

08-25-2007 05:16:46




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 Re: percentage pull formula in reply to smdv806, 08-24-2007 18:53:38  
Dead Weight Pulling.



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smdv806

08-23-2007 07:30:49




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 Re: percentage pull formula in reply to Jerry Thomas, 08-22-2007 12:24:32  
(weight pulling divided by weight of tractor) x 100

example 10,000lbs/5000 lbs tractor = 2 x 100 = 200%



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