Oldershaw O-3

Année du premier vol
(ou de design, si seul projet)
Pays USA
Designer(s) OLDERSHAW, Vernon
Premier constructeur Vernon OLDERSHAW, Bakersfield (California, USA)
Type d'appareil Planeur
Fonction Expérimental

Envergure 16.42 m
Surface alaire11.52 m2
Profil aileWortmann 61-184 emplanture, 60-126 saumon
Masse à vide345 kg
Masse maxi454 kg
Charge alaire39.41 kg/m2
Vitesse mini--
Vitesse maxi--
Finesse maxi41 à 108 km/h
Taux de chute mini0.64 m/s à 90 km/h
Nb sièges1
StructureStructure bois avec un nez en composite fibre de verre.

[Gliders and Sailplanes of the world]
[Pas de plan 3 vues connu]


Vernon OLDERSHAW, Bakersfield (California, USA)2
Nombre total de constructions2
Infos techniquesEmpennage en V.
Histoire résuméeA 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.

The original 0-3 single-seat sailplane was designed and built by Mr Vernon W. Oldershaw of Bakersfield, California, in 15 months for a cost of $4,000, and it made its first flight in June 1967. He then began to develop a retractable powerplant installation which was added to a second 0-3 completed in 1975, the engine being used primarily for take-off and climb to soaring height. It is a 31 hp Yamaha Snowmobile SW433 two-stroke 'flat twin' driving a two-blade fixed-pitch wooden pusher propeller, the pylon mounted propeller retracting forwards into the fuselage behind closed doors to lie over the engine, which is behind the cockpit. There is a single aluminium fuel tank in the fuselage of 2.5 US gallons capacity. The 0-3 is of all-wood construction with cantilever shoulder wings and a V-tail; the wings have a spruce spar and plywood ribs and skins, with wooden ailerons and air brakes on the trailing edges. The ellipitcal-section fuselage is built up from plywood bulkheads, the front portion from the nose to the wing trailing edge having a glassfibre outer shell and the remainder being plywood-covered. The tail surfaces, which are slightly swept back, are
of similar construction to the wings. There is a retractable rubber-sprung monowheel and a tail skid. The pilot sits under a one-piece flush-fitting cockpit canopy.
Liens personnalités Pas de personnalité associée.
Exemplaires existants
Immatriculé : N26888 (En exposition), localisation : Southwest Soaring Museum, Moriarty (New Mexico, USA)
Compléments docs


Liens WEBSite : SailplaneDirectory.com . Oldershaw. (2010-03-21)
Site : Sailplane Directory . O-3 ; note + 2 photos + specs. (2015-12-01 CL)
LivresGliders & Sailplanes of the world
par HARDY, Michael (1982) [p. 161. Note + photo + specs].


Pas de plan ou kit référencé.
Fiche n° 978 [Dernière mise à jour : 2015-12-01]