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Dear friends and followers, welcome back to my channel todays questions which was sent in by one of my instagram followers.“Joe do airliners have an ignition key?". That question is justifable and made me smile.
Okay let´s work from bottom to top, starting with gliders. Gliders are first and foremost locked up in a hangar or car trailers, and most of them don´t have a lock at all, to enter the cockpit you grab the release handle through the fresh air window to unlock the glass dome. And as most gliders don´t have a motor, they don´t have an ignition key.
Now let´s look at the cockpit of a Cessna 172. These planes are very often parked outside and are accessible to anybody who´s working or just wandering around at the airfield, so therefore it makes sense to have a key which locks the doors and other hatches to make it at least more difficult for thieves to enter the cockpit. And there is a market out there selling alarms for these aircrafts, trust me airplanes do get stolen once in a while.
But the key´s purpose is not only to lock the doors, it is also used as ignition key to start the engine. Because most airplanes in the general aviation category have electric starter motor, smiliar to the one in your car, the turning of the key acts as a mechanical switch, connecting the battery with the starter motor.
Other than that, during engine run up procedures you have to check the two magentos of the engine ignition system by using the key.
There are planes out there which have starter pushbuttons but are very often interconnect by a key.
Moving up to little business jets like the Cessna Citation, also have a key which opens the main door which unfolds stairs to enter the cabin, and some cargo compartments are also accessible with that key. But there is no ignition key to start up the engines. I know some executive jets have a key to start up the electrical system but only to make a little more tamper-proof.
See more how airliners start their engines and lock their doors.
Thanks for watching, all the best your "Captain" Joe
Big thank you to my dear pilot friend Genia (@flyingenii INSTAGRAM) for providing me with the video on how to open an executive jet.
Also big thank you to Leo, who provide the great thumbnail picture @munichaviation (Instagram)
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