Ras_Al_Ghul, on Nov 21 2008, 09:27 PM, said:
I don't know about European cars, but here in the US almost all cars have rear leaf-springs.
Passenger cars are bound to have some sort of coil-sprung suspension, front and rear, regardless if its the US or the EU. The newest Corvette is an exception, altough I wouldn't call its rear suspension for "leaf springs", since its far more advanced. I'm guessing you're thinking of larger SUVs and pick-up trucks - these are trucks, not cars. ;) It's the same in europe, work-trucks and vans are usually fitted with leaf-spring suspension because it's a cheap, sturdy construction capable of higher loads compared to coil springs (but both are inferior to hydropneumatic suspension, which outperforms all suspension types in all categories!).
Personally, I would think of your first design (first post in this thread) to be closer to the principles of leaf spring suspension compared to Crowkiller's. That's because the technic axle, of which you fitted the coils, would flex whenever there's some tension put on the coils. The axle flexing is the very core function of leaf springs supension.
I would advice you to only use this method if you're willing to sacrifice the axles, but replacing the coil-springs with axles would be a much more realistic approach to leaf-springs. Reinforce by spreading the tension across more axles. Then you'll have real