They used to use what were basically shotgun shells with no pellets to start airplane engines -- it was called a Coffman engine starter (it was actually used as

They used to use what were basically shotgun shells with no pellets to start airplane engines -- it was called a Coffman engine starter (it was actually used as a plot device in the movie Flight of the Phoenix). https://en.wikipedia.org/wiki/Coffman_engine_starter https://en.wikipedia.org/wiki/Coffman_engine_starter