Torsional rigidity of single vs double X-bracing for body in frame

[DasKleineWunder]

Hi everyone!

If you had a narrow and long ladder frame Would you get better torsional stiffness by using double X-bracing instead of a single one?

 

[GregLocock]

Great question.

However your sketch rather distorts the likely proportions.

If you redraw it for a normally proportioned vehicle you'll see that an XX configuration is not far away from lots of lateral cross members, and that ain't gonna work.

If you are working on a 1955 era car type chassis, where the rear kicks up over the rear axle, it may be worth putting an X in on the rising part, but all the real work is done by the main X under the floor.

The devil is in the details if you are aiming at a substantial increase in torsional stiffness.


As ever if you supply more details you'll probably get a more useful response.[highlight #FCE94F][/highlight]






Cheers

Greg Locock


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