Pulley systems ease lifting with ropes over wheels. Single pulleys change force direction; fixed pulleys change direction; movable pulleys reduce effort. Adding pulleys creates mechanical advantage.

Most modern engines, like the LS series, were designed around this system, but for the most part, older small-blocks were stuck in V-belt land. Sure, you could dig up a factory serpentine kit from ...

A Hungarian design team has unveiled a new chainless bike, powered by steel wires, that easily disassembles and can be organized for touring or racing. The "Stringbike" uses two steel cables ...