Editing Kill switch (section)

==Vehicles==
[[Image:Emergency Train Stop Button.jpg|right|thumb|An emergency switch in Japan]]
On [[rail transport|railways]],<ref>{{cite news |newspaper=[[BizJournals]].com (Pittsburgh)
   |url=https://www.bizjournals.com/pittsburgh/news/2017/12/21/many-trains-still-lack-crucial-braking-system.html
   |title=Law Requires Life-Saving Braking Device: Most Trains Still Lack Crucial Braking System
   |author=Patrick McGeehan |date=December 20, 2017}}</ref> an emergency stop is a full application of the [[emergency brake (train)|brakes]] in order to bring a [[train]] to a stop as quickly as possible.<ref>{{cite news |newspaper=[[The Los Angeles Times]]  |url=https://www.latimes.com/nation/la-na-new-york-train-crash-ntsb-20150205-story.html
|title=Train engineer pulled emergency brake when he saw SUV |date=February 5, 2015}}</ref> This occurs either by a manual emergency stop activation, such as a button being pushed on the train to start the emergency stop, or on some trains automatically, when the train has [[signal passed at danger|passed a red signal]] or the driver has failed to respond to warnings to check that they are still alert, which is known as a [[dead man's switch]]. A similar mechanism is the [[watchdog timer]].

In large [[Ship|ships]], an emergency stop button pulls the [[countershaft]] for the [[Fuel pump|fuel pumps]] to the stop position, cutting off the fuel supply and stopping the engines. With a [[Controllable pitch propeller|controllable-pitch propeller]], the stop button may declutch the engine from the propeller.

[[NASCAR]] requires all their stock cars to be equipped with a [[steering wheel]]–mounted kill switch, in case the [[accelerator pedal]] sticks and the driver needs to shut down the engine.

A related concept is the [[dead man's switch]], where the operator must be holding a button or lever any time the vehicle is operating.  A common example of this is the kill switches used by [[boat]]ers and [[jetski]]ers wherein a cord connects the kill switch to the operator (usually by the operator's [[personal flotation device|life jacket]] or clothing), and if the operator is thrown overboard in an accident, the cord will pull the switch and immediately shut down the vessel's engine. This prevents it from becoming a runaway vessel that could impose a danger to other vessels or swimmers at sea, and allows the operator to swim back to the vessel and re-board it without the risk of being injured by the boat's propeller.  A similar device is featured on most lawnmowers: a lever on the handle either disables the ignition system and applies a brake to the [[flywheel]] (on a gasoline lawnmower), or cuts the power to the motor (on an electric lawnmower), as long as it is not held down.

Monster Truck Racing Association requires all of their [[monster trucks]] to be equipped with kill switches (either remote or in cab), in case the monster truck loses control and the driver needs to shut off the engine. Monster trucks' kill switches are tested before races. {{citation needed|date=December 2015}}

===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.