Forum Discussion
Ron_Gratz
Jan 29, 2014Explorer
kgarrett9999 wrote:You're correct -- it depends. It depends on:
Obviously, the answer to my question is going to depend, but what is a good rule of thumb to use when estimating how much weight a WD Hitch will transfer from the hitch?
distance from TV rear axle to ball (D2),
distance from ball to midpoint between TT's axles (D3),
and amount of Front Axle Load Restoration (FALR).
The fairly simple relationship is: TW% = FALR% * D2/(D2+D3)
where TW% is percent of TW transferred to TT's axles
and FALR% is load restored to front axle divided by load removed from front axle.
For example, if D2 = 65", D3 = 195", and FALR% = 100%: TW% = 100% * 65(65+195) = 25%
For the above dimensions, if you wish to restore only 75% of front axle load, TW% is 18.75%.
If you wish to restore 125% of front axle load, the theoretical TW% is 31.25%.
Given the actual values for D2 and D3 and your desired FALR%, you can calculate your own value for the required percentage of TW transferred to the TT's axles.
The short answer to your question -- 20% is a pretty good rule of thumb.
Ron
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