noteven Posted January 31, 2015 Report Share Posted January 31, 2015 Weight transfer for payload or equipment added situated between the axles can be calculated using: (A x PL) = LR WB PL - LR = LF Where: A = Payload item cg distance in WB dimension units (such as inches) to front axle PL = Payload (or added equipment) item weight WB = Wheelbase dimension (center line of front axle to center of rear axle or rear axle group - i.e. center of tandems) LR = Load to rear axle. LF = Load to front axle. For loads like the hitch and pin weight behind the rear axle - I can cipher out the answer with placemat math but I cannot express it as a proper formula. Need help. Link to comment Share on other sites More sharing options...
Deezl Smoke Posted January 31, 2015 Report Share Posted January 31, 2015 Weight transfer for payload or equipment added situated between the axles can be calculated using: (A x PL) = LR WB PL - LR = LF Where: A = Payload item cg distance in WB dimension units (such as inches) to front axle PL = Payload (or added equipment) item weight WB = Wheelbase dimension (center line of front axle to center of rear axle or rear axle group - i.e. center of tandems) LR = Load to rear axle. LF = Load to front axle. For loads like the hitch and pin weight behind the rear axle - I can cipher out the answer with placemat math but I cannot express it as a proper formula. Need help. Would'nt you simply replace LF with LH (load to Hitch) for the trailing unit? Link to comment Share on other sites More sharing options...
Bob A Posted January 31, 2015 Report Share Posted January 31, 2015 A is then a negative number should all calculate the same. Link to comment Share on other sites More sharing options...
Ronbo Posted January 31, 2015 Report Share Posted January 31, 2015 That is a headache in the making And i used to calculate cg in the AF. Easier to go have each wheel weighed. Link to comment Share on other sites More sharing options...
Mark and Dale Bruss Posted January 31, 2015 Report Share Posted January 31, 2015 There is this calculator in the Resource Guide, Calculating Toter Bed Link to comment Share on other sites More sharing options...
noteven Posted January 31, 2015 Author Report Share Posted January 31, 2015 A is then a negative number should all calculate the same. That sounds right: (- R x PL) = FLR WB Where: R = Payload item cg distance in WB dimension units (such as inches) behind the center of rear axle group PL = Payload (or added equipment) item weight WB = Wheelbase dimension (center line of front axle to center of rear axle or rear axle group - i.e. center of tandems) FLR = Front Load Reduction. There is no second calculation as all the weight is carried by the rear axle(s) as the fulcrum. So a 5000lbs ET & trailer pin set 36 inches behind the axle on a 230" wheelbase truck would be: (-36 x 5000) = 782lbs - weight removed from front axle. 230 Link to comment Share on other sites More sharing options...
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