Editing Kill switch (section)

===Pioneer-era planes and World War I aircraft===
Early aviators using [[rotary engine]]–powered aircraft from [[Aviation in the pioneer era|the beginnings of their use]] [[Gnome Omega|in 1908]], up through the end of [[Aviation in World War I|World War I]] in 1918 had what could be called a reversed functionality version of the "dead man's switch" for cutting the [[spark ignition|ignition]] voltage to the spark plugs on such a power-plant, to give a degree of in-flight speed control for a rotary engine.  This was often called [[Rotary engine#Rotary engine control|a "blip switch" or "coupe switch"]] (from the French term {{Lang|fr|coupez}}, or "cut") and when not being pressed, allowed the high voltage from the engine's [[ignition magneto|magnetos]] to operate the ignition with normal engine operation in flight—pressing the "blip switch" cut the flow of high voltage from the magnetos, stopping the combustion process in the cylinders. When such a "blip switch" was intermittently used on landing approach, this allowed a limited degree of engine speed control, as rotary engines generally did not have a conventional [[throttle]] in their [[carburetor|carburettors]] to regulate engine speed, but only for governing the fuel-air ratio for start-up and full-speed operation.