[Murilo Specht]

Chocks are used in airfields aswell, at least on piston engined aircraft (small aircraft), because in most of them, when you turn on the engine, you have to throttle up, to open the admission and let air in, or else, the fire of combustion could go through the admission during engine start, but it's pretty common to happen.

Sorry if I got something wrong, it's been sometime I had this class.