Back from the scales
Went to the scales at the transfer station today. Pretty surprising numbers. I went with just Lena, me, full tank of gas first trip. Front axle 3200 Rear axle 3000 Total of 6200 Lena's a b...
Forum Discussion
GMT830 wrote:
---Ron, curious how you arrived at the TW.---
The net load removed from the front axle is a function of three TV/TT dimensions and two unknowns: 1) the tongue weight, and 2) the load transferred to the TT axles by the WDH.
The net load added to the rear axle is a different function of the same TV/TT dimensions and the two unknowns.
This means we have two simultaneous equations from which the two unknowns can be calculated when we know/assume three TV/TT dimensions and the net load changes for the front and rear axles.
The solution for tongue weight is as follows --
Let: a = TV wheelbase, b = TV ball overhang, c = distance from ball to midpoint between TT axes.
Let: C5 = (b+c)/a, C6 = (a+b+c)/a, C7 = b/a, C8 = net load added to TV's rear axle, and C9 = net load removed from front axle.
I then assumed: a = 130", b = 65", and c = 255".
The measured values for C8 and C9 were 1200# and 200# respectively.
The equation for tongue weight is --
TW = (C8*C5 - C9*C6)/((1+C7)*C5 - C6*C7).
For the assumed and measured values,
TW = (1200*2.46 - 200*3.46)/(1.5*2.46 - 3.46*0.5) = 2260/1.96 = 1153# rounded to 1150#.
The load transferred to the TT axles then is equal to the tongue weight minus the load carried by the TV or,
load transferred to TT = 1150# - 1000# = 150#.
Ron
