In racing and very-high-performance road cars, other disc materials have been employed. discs and pads inspired by aircraft braking systems such as those used on were introduced in by in conjunction with in 1976. Carbon–carbon braking is now used in most top-level motorsport worldwide, reducing , giving better frictional performance and improved structural properties at high temperatures, compared to cast iron. Carbon brakes have occasionally been applied to road cars, by the French Venturi sports car manufacturer in the mid 1990s for example, but need to reach a very high before becoming truly effective and so are not well suited to road use. The extreme heat generated in these systems is easily visible during night racing, especially at shorter tracks. It is not uncommon to be able to look at the cars, either live in person or on television and see the brake discs glowing red during application.
Unlike car disc brakes that are buried within the wheel, bike disc brakes are in the airstream and have optimum cooling. Although cast iron discs have a porous surface which give superior braking performance, such discs rust in the rain and become unsightly. Accordingly, motorcycle discs are usually stainless steel, drilled, slotted or wavy to disperse rain water. Modern motorcycle discs tend to have a floating design whereby the disc "floats" on bobbins and can move slightly, allowing better disc centering with a fixed caliper. A floating disc also avoids disc warping and reduces heat transfer to the wheel hub. Calipers have evolved from simple single-piston units to two-, four- and even six-piston items. Compared to cars, motorcycles have a higher : ratio, so they experience more when braking. Front brakes absorb most of the braking forces, while the rear brake serves mainly to balance the motorcycle during braking. Modern typically have twin large front discs, with a much smaller single rear disc. Bikes that are particularly fast or heavy may have vented discs.
Today’s Wonder of the Day was inspired by Nya from , . Nya Wonders, “How do car brakes work” Thanks for WONDERing with us, Nya!
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