6-Volts to 42-Volts: Progress in an Electric World
My, how electrical systems for internal combustion engines have changed in the last century. Of course, we all know electricity is a necessity, because it’s an electrical spark that ignites the gasoline that makes the motor run.
The very first automotive electrical system was fired by a magneto, a simple device that requires no battery. Simply stated, the engine spins a magnet inside a coil, which creates electricity. A contact breaker, or switch, controls the release of electricity to the spark plug, creating a spark to ignite the fuel making the piston(s) go up and down accordingly.
As a matter of fact, to this very day, piston-driven motors such as those found in lawnmowers, chainsaws, and snowblowers, to name a few, all have a magneto creating the spark that drives the engine. Magnetos are used on a variety of aircraft. A single-engine plane would have two magnetos, for safety and an extra power boost to save fuel.
