please help me in figuring out how to determine the whether an axle would interfere with suspension..i am fabricating a vehicle.the suspension is independent double wishbone a arms and the axle has two coupling, one rubber and then a cv shaft..urgent help required..
If you want to skip the CAD part, build a mockup of the chassis. As a member of a former Mini Baja team the template for the chassis is fixed. The rules were a little more liberal when it came to engine mounting points. Once we got the engine + drivetrain stuff we did a mockup of engine placement + CV shafts, and designed the suspension points accordingly w/ engine mounting points.
A bit rough, but steel was free, and the car handled fine. Ironically it was the front suspension arms that needed more reinforcement as one of them snapped during compression (after a 30 ft descent)
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Front or rear? Rear is easier than front, since you only need to worry about full bump/droop, instead of bump/droop plus left/right steering lock.
You also did not mention what type of spring/dampener you plan to use. A pushrod & rocker arrangement will be easiest to package with regards to axle clearance. But whatever you do, design your suspension geometry so that all the structural members are loaded in tension/compression, and the attachment/pivot points are loaded in double shear. That will make the unsprung suspension structure the lightest and stiffest. In other words, don't locate your spring/dampener attachment to the a-arm such that it puts the a-arm in bending.
Finally, make sure your CV joint spline/stub axle/flange has plenty of plunge clearance for the axle at full bump/droop.
Good luck,
Terry
"Q: How do you make a small fortune in racing?
A: Start with a large one!"
