Welch O-2

Type: 2-cylinder air-cooled horizontally opposed aircraft piston engine
Bore: 4.5 in
Stroke: 4.25 in
Displacement: 135 in³
Dry weight: 115 lb

O-2
Type	Horizontally Opposed Piston Engine
National origin	United States
Manufacturer	Orin Welch Aircraft Company
Designed by	Orin Moore Welch
First run	1931
Major applications	Welch OW-7M
Number built	7

The Welch O-2 is a light two-cylinder engine developed for the Welch OW-7M series of aircraft.^[1]

Specifications (O-2)

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