Torsion Bar Ratings

[Wurzel 16]

I'm sure there is a way to calculate the torsional stiffness and therefore what poundage the bars equate to.

 

Trouble is, it's been a few years since I did the old mechanical engineering course and now I can't remember.

 

Is there a simplish method of working out the stiffness of the bar? Does anyone know by how much stiffer the bars are given the different thicknesses available?

 

I suspect Adi may be able to help (saves me digging out my notes from the loft)

 

I understand that there are many variables to take into account but I'm only after an approximation, mainly as a guide for others.

 

Thanks

[Adi 0]

K= 1,178,000 ( d)*4 / (L) (A)*2 -d is to the fourth power, and A is

to the second power. -d is diameter of torsion bar -L is torsion bar

length -A is the lever arm length

 

 

Hope that helps

 

a 19mm bar equates to about 90-95lb

 

a 21mm bar equates to 135lb

 

a 23mm bar equates to 194lb

[Wurzel 16]

A bit different from what I remember but all the same, thanks.

[cybernck 403 1 Cars]

wow, that's very useful bit of info adi!