The 1923 AM-1 was the first aircraft with an all-metal fuselage covered with sheet aluminium in the US. Designed by Paul Zimmerman to be a replacement for de Havilland DH-4 in mail and cargo duties, but test flights were disappointing, and stability problems brought an end to the project. Only one was built.
Engine: Liberty 12, 400 hp
Wing span: 50 ft 0 in
Length: 32 ft 11 in
Payload: 1575 lb
Speed: 116 mph
Stall: 44 mph
Seats: 1
All Aero 