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Douglas M-1 / M-2 / M-3 / M-4 (Mailplane)

Douglas M-2, Western Air Express, NC150, c/n M-338 © David Lednicer
Photo ©: David Lednicer (Photos at airliners.net)

M-1 / M-2 / M-3 / M-4 (Mailplane)

Mail Aircraft

The Douglas M-1 / M-2 / M-3 / M-4 is a series of single-engine single-seat mailplanes produced by the US-American manufacturer Douglas Aircraft Company. The M-2 was the first production model.
Crew1
 
Propulsion1 Piston Engine
Engine ModelLiberty L-12
Engine Power298 kW400 hp
 
max. Cruise Speed178 km/h96 kts
  110 mph
max. Speed (vne)224 km/h121 kts
  139 mph
Service Ceiling5.029 m16.500 ft
Range1.128 km609 NM
701 mi.
 
Empty Weight1.542 kg3.400 lbs
max. Takeoff Weight2.223 kg4.900 lbs
 
Wing Span13,56 m44,5 ft
Wing Area38,2 m411 ft
Length8,81 m28,9 ft
Height3,07 m10,1 ft
 
First Flight1925
Production Statusout of production
Total Production57
Developed fromDouglas O-2
 
Data for (Version)Douglas M-4
VariantsDouglas M-1, M-2, M-3, M-4
Remarks
The Douglas M-series is a development of the Douglas O-2 observation aircraft.

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