Longer Shank Effects On WD Hitch
This weekend I am going to switch from a 12" shank to a 18" shank so I can open my tailgate while I am hooked up. How much difference will this make on the settings or stress on the WD hitch and re...
Forum Discussion
The ratings of the various components DO NOT CHANGE, but their effective capacity
does when you change their geometry with a longer shank
Take any TV's receiver and it's rating listed on the label somewhere on it
NOTE that the receiver cross bar/tube/etc is a torsion bar in how it works in WD
mode.
Take a 6 foot bar shoved into the receiver pin box.
Take a 1,000 set of weights and the same weights for both of these tests....
Place that 1K of weights on the end of that 6 foot bar and measure the amount
of 'twist' the receiver cross tube has taken
Place that 1K of weights on the end of that 7 foot bar and measure the amount
of 'twist' the receiver cross tube has taken
The receiver's ratings did not, has not...changed in any way during either of
these tests....nor has the 1,000 lbs of test weights
The only difference is the length of the bar shoved into the receivers pin box
The longer bar will twist the receiver cross tube more because it has more 'lever arm'
than the shorter bar...am now wondering if anyone here has ever used
crow bars...and if have done so...used several of varying lengths on
the same hunk of concrete that they are trying to pry loose...
The length difference can be fractions of an inch...to inches...to feet...to yards
The math is the same with the constants and the variables are just in length
of that lever arm...
does when you change their geometry with a longer shank
Take any TV's receiver and it's rating listed on the label somewhere on it
NOTE that the receiver cross bar/tube/etc is a torsion bar in how it works in WD
mode.
Take a 6 foot bar shoved into the receiver pin box.
Take a 1,000 set of weights and the same weights for both of these tests....
Place that 1K of weights on the end of that 6 foot bar and measure the amount
of 'twist' the receiver cross tube has taken
Place that 1K of weights on the end of that 7 foot bar and measure the amount
of 'twist' the receiver cross tube has taken
The receiver's ratings did not, has not...changed in any way during either of
these tests....nor has the 1,000 lbs of test weights
The only difference is the length of the bar shoved into the receivers pin box
The longer bar will twist the receiver cross tube more because it has more 'lever arm'
than the shorter bar...am now wondering if anyone here has ever used
crow bars...and if have done so...used several of varying lengths on
the same hunk of concrete that they are trying to pry loose...
The length difference can be fractions of an inch...to inches...to feet...to yards
The math is the same with the constants and the variables are just in length
of that lever arm...
