Cosmos Echo

The Cosmos Echo is a French single-seat, flying wing, 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][2]

Echo
Role Ultralight trike
National origin France
Manufacturer Cosmos ULM
Status In production
Unit cost
€11,538.00 (Echo Racer, 2012 price)

Design and development

The Echo was designed to comply with the European Fédération Aéronautique Internationale microlight classification and has been used in microlight competition flying. It features a cable-braced hang glider-style high-wing, weight-shift controls, a single-seat, open cockpit, tricycle landing gear and a single engine in pusher configuration.[1][2]

The aircraft wing is made from bolted-together aluminium tubing, with its double surface wing covered in Dacron sailcloth. A number of different wings can be fitted, including the Top 12.9. 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 twin cylinder, two-stroke and 30 kW (40 hp) Rotax 447 powerplants[1][2]

Variants
Echo 12
With the 37 kW (50 hp) Rotax 503 twin cylinder, two-stroke engine and the Top 12.9 wing.[1]
Echo Fun
With the 30 kW (40 hp) Rotax 447 twin cylinder, two-stroke engine.[2]
Echo Racer
With the 37 kW (50 hp) Rotax 503 twin cylinder, two-stroke engine.[2]

Specifications (Echo Racer)

Data from Bertrand and Purdy[1][2]

General characteristics

  • Crew: one
  • Wingspan: 9.87 m (32 ft 5 in)
  • Wing area: 12.9 m2 (139 sq ft)
  • Empty weight: 126 kg (278 lb)
  • Gross weight: 300 kg (661 lb)
  • Fuel capacity: 38 litres (8.4 imp gal; 10 US gal)
  • Powerplant: 1 × Rotax 503 twin cylinder, air-cooled two-stroke aircraft engine, 37 kW (50 hp)
  • Propellers: 3-bladed Powerfin composite

Performance

  • Maximum speed: 155 km/h (96 mph, 84 kn)
  • Cruise speed: 110 km/h (68 mph, 59 kn)
  • Stall speed: 40 km/h (25 mph, 22 kn)
  • Range: 523 km (325 mi, 282 nmi)
  • Service ceiling: 55,000 m (180,000 ft)
  • Rate of climb: 4.1 m/s (800 ft/min)

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References
  1. Bertrand, Noel; Rene Coulon; et al: World Directory of Leisure Aviation 2003-04, page 97. Pagefast Ltd, Lancaster OK, 2003. ISSN 1368-485X
  2. Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 142. BAI Communications. ISBN 0-9636409-4-1
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