BOAT wrote: ↑
Wed Jun 24, 2020 2:42 pm
So is that what you call them? "ELASTOmeric RODS??" Never heard of those - is that how the trailer works?
Take a square tube. Get a square solid bar that fits inside but rotates cleanly. Turn it 45 degrees to the outer tube, and fill those triangular corner empty spaces with rubber rods, one per corner, and tightly fitted. Now try to rotate that inner solid square bar. The rubber rods get compressed and resist the rotation of the inner bar.
Put a short arm on the end of the inner bar and an axle stub parallel to the inner bar. Now you have a crank arm that doesn’t want to rotate within the outer tube because those squishy rubber rods get squashed when the inner bar is rotated.
Anchor the outer tube to the trailer frame, and duplicate what you have on one end on the other end, and you have a torsion bar suspension.
Volkswagen Beetles and other cars had torsion bar suspension, but they just used steel bars that twisted as the ‘crank arm’ was rotated. I took my Class A CDL test, before there actually was such a thing as a CDL (just a Class 1 license by weight and type), in a Kenworth cabover tractor with trailer, and the tractor had torsion bar suspension. Big, heavy torsion bars, but torsion bars nonetheless.