Echo
Role Ultralight trike
National origin France
Manufacturer Cosmos ULM
Status In production

The Cosmos Echo is a French single-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][2]

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: 5,500 m (18,000 ft)
  • Rate of climb: 4.1 m/s (800 ft/min)

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
  2. 1 2 3 4 5 6 Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 142. BAI Communications. ISBN 0-9636409-4-1
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