O-3 Oldershaw   

General Details
Manufacturer: Oldershaw
Plane Name:


Classified as: Unclassified
Country Of Origin: U S A
Designer: Vern Oldershaw
No. of Seats 1
No. Built 2
L/DMax: 41 108 kph / 58 kt / 67 mph
MinSink: 0.64 m/s / 2.1 fps / 1.24 kt


Span Area Empty Weight Payload Gross Weight Wing Load Water Ballast
m ft sq.m sq.ft kg lb. kg lb. kg lb. kg
kg lb.
16.46 54 11.52 124 345 760 109 240 454 1000 39.41 8 0 0
Aspect ratio: 23.5
Airfoil: Wortmann 61-184 root, 60-126 tip
Structure: wood with fiberglass nose

A development of the O-2 but for Open Class competition, the O-3 featured a longer span of higher aspect ratio, with trailing-edge airbrakes and a retractable gear. One was flown in several Nationals and made a flight of 694 km./ 431 miles. Two O-3’s were built, and both were subsequently motorized. A two-cylinder, in- line, two-cycle Yamaha snowmobile engine was mounted inside the fuselage behind the wing spar driving a pylon-mounted pusher propeller via belts.


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