Certified in 1976, the M74 Wasp was a single-seat piston-engined agricultural/utility modifications of Bell OH-13E (Bell 47) helicopter.

 

The 1977 M74A Wasp applied the modifications to Bell OH-13H.

 

M74 Wasp

Engine: Lycoming TVO-435-A1E, 200hp

Rotor: 35'1"

Length: 31'5"

Useful load: 1020 lb

Max speed: 100 mph

Cruise: 80 mph

Range: 150 mi

Seats: 1

 

M74A Wasp

Engine: Lycoming TVO-435, 240hp

Seats: 1