Leaf Springs 

The form of suspension that was developed for use on medieval carts and carriages, yet is still used (for some reason or another) on American cars despite more modern forms of suspension.

"And the rear wheels have.. leaf springs. Leaf springs. Let me make that live for you: if you went to your doctor's and he got a jar of leeches out." ~Jeremy Clarkson on the Corvette's suspension.

Leaf Springs by HaniiPuppy October 2, 2009

transverse leaf springs 

Cars using transverse leaf springs in their suspension are not to be confused with older cars and trucks that use solid rear axle/leaf spring combinations.

The system is used in some high performance sports cars. Instead of using 4 coil springs, the cars use two single ply (instead of the multiple plys used in trucks/cars with live axles) leaf springs mounted transversely. Using a single ply makes them immune from the friction problems seen in multiple ply systems and also makes them very light (a single transverse leaf spring weighs 1/3 of the weight of the coil springs that could have been used). These cars often use double wishbone or multilink suspensions, just like any other sports car, just not paired with coil springs over the dampers.

Transverse leaf springs have the benefits of being very lightweight, moving more of the cars weight towards the ground, easily adjustable, and rarely (if ever) needing replacement.

They have the disadvantages of being more expensive than coil springs, and since the springs are often made of a lightweight composite material, they are sensitive to damage from harsh chemicals.

Modern Corvettes use transverse leaf springs paired with double wishbone supension on all four corners.

F1 used transverse leaf springs until they switched to the use of torsion springs.

transverse leaf springs by Subie May 8, 2006

needs more leafspring 

originated at the focaljet by MxRacerCam. in reference to the BBC car show Top Gear and it's disdain for the C6 model chevrolet corvette's leaf-spring suspension, despite the fact that the C6 is one of the best handling cars they have ever tested.

now used in reference to any situation (and most often a thread in a forum) that is weak or without merit.

"this thread needs more leafspring"

"steeda's mom needs more leafspring"

needs more leafspring by dave May 7, 2005