Hensley Arrow: How does it REALLY work?
There have been several discussions on this hitch that have become somewhat 'controversial'. I am NOT trying to stir this controversy/bashing back up. Instead, I'd like to see a good, intelligent di...
Forum Discussion
willald wrote:
...Anyway, Tim: See what you come up with using these numbers, I know they are pretty accurate. I'll be curious to see the difference in 'moment' calculations we come up with from Tim's model, using these numbers. :)
Will,
Following are the results of my calculations using your numbers. Perhaps Tim can verify the values after the weekend.
RESULTS FOR WILL'S RIG WITH "CONVENTIONAL" HITCH
(assumes ball would be 12" forward of HA ball location)
Assumed Moment About TT Axles Center... 1000 ft-lbs
Distance TT Axles to Ball Coupler.................. 22 feet
Distance TV Rear Axle to Ball Coupler......... 59.5 inches
Distance Ball Coupler to Pivot Point................. 0 inches
Distance Pivot Point to TV Rear Axle........... 59.5 inches
Lateral Force Acting at Ball Coupler................ 45 lbs
Lateral Force Acting at Pivot Point.................. 45 lbs
"Steering Moment" about TV Rear Axle.......... 225 ft-lbs
RESULTS FOR WILL'S RIG WITH HENSLEY ARROW
Assumed Moment About TT Axles Center... 1000 ft-lbs
Distance TT Axles to Ball Coupler.................. 22 feet
Distance TV Rear Axle to Ball Coupler......... 71.5 inches
Distance Ball Coupler to Pivot Point............. 47.1 inches
Distance Pivot Point to TV Rear Axle........... 24.4 inches
Lateral Force Acting at Ball Coupler................ 39 lbs
Lateral Force Acting at Pivot Point.................. 39 lbs
"Steering Moment" about TV Rear Axle.......... 78 ft-lbs
HA Force / Conventional Force.......... 85%
HA Lever Arm / Conv. Lever Arm........ 41%
HA Moment / Conventional Moment... 35%
The calculations show that the HA would reduce the "steering moment" to 35% of the value for a "conventional" hitch.
Ron
