Cosmos Bison

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Bison
Role Ultralight trike
National origin France
Manufacturer Cosmos ULM
StatusIn production
Variants Cosmos Phase II

The Cosmos Bison, also called the Cosmos Bidulm, is a French two-seat, ultralight trike that is produced by Cosmos ULM. The aircraft is only supplied as a completed aircraft and is not available as a kit. [1]

Contents

Design and development

The Bison was designed to comply with the European Fédération Aéronautique Internationale microlight classification. It features a cable-braced hang glider-style high-wing, weight-shift controls, a two-seats-in-tandem open cockpit, tricycle landing gear and a single engine in pusher configuration. [1]

The aircraft wing is made from bolted-together aluminum tubing and covered in Dacron sailcloth. A number of different wings are available for the Bison. The wing is supported by a single tube-type kingpost and uses an "A" frame control bar. Optional equipment includes a cockpit fairing and wheel pants. Engines used are the 37 kW (50 hp) Rotax 503 and 30 kW (40 hp) Rotax 447 twin cylinder, two-stroke powerplants. The landing gear is cable-braced, which allows a folding design for ground transport or storage. [1]

The Bison was later developed into the Cosmos Phase II, by adding larger seats, new landing gear shock absorbers and a redesigned engine mount to reduce vibration. In 2012 the Bison remained in production alongside the Phase II and Phase III, offering a simpler, lighter and less expensive two seater than the newer models. [1]

Specifications (Bison)

Data from Bertrand [1]

General characteristics

Performance

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References

  1. 1 2 3 4 5 Bertrand, Noel; Rene Coulon; et al: World Directory of Leisure Aviation 2003-04, page 97. Pagefast Ltd, Lancaster OK, 2003. ISSN 1368-485X
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