Zeppelins like the Graff and Hindenburg had machine shops onboard as well! Their engines were very unreliable, they could do overhauls mid-flight. Airplanes ar

Zeppelins like the Graff and Hindenburg had machine shops onboard as well! Their engines were very unreliable, they could do overhauls mid-flight. Airplanes around that time were just as unreliable, but flew shorter hops. Had to overhaul or swap their engines quite regularly between flights.