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EEL ULF 2

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Wingspan
  
11 m

EEL ULF 2 EEL ULF2 Untitled Aviation Photo 2263137 Airlinersnet

Manufacturer
  
Entwicklung und Erprobung von Leichtflugzeugen

The EEL ULF 2 is a West German low-wing, conventional landing gear, single-seat motor glider that was designed by Dieter Reich and is provided in the form of plans by Entwicklung und Erprobung von Leichtflugzeugen (English: Development and Testing of Light Aircraft) for amateur construction.

Contents

EEL ULF 2 EEL ULF2 Ultralight Motorglider Untitled Aviation Photo

Design and development

EEL ULF 2 httpsuploadwikimediaorgwikipediade448EEL

The prototype was built in 1993 by Anton Quanz with Horst Fischer building the engine installation and electrical system. The ULF 2 first flew in October 1993.

EEL ULF 2 ULF 2 Technical Data

The ULF 2 is predominantly constructed from northern pine or Douglas fir, with spruce and birch plywood and covered with doped aircraft fabric. The engine cowling, wing tips and fairings are made from fibreglass. The 11 m (36.1 ft) span wing features a Wortmann FX 63-137 airfoil and top surface spoilers. The aircraft mounts a ballistic parachute full-aircraft recovery system. The landing gear is conventional with a steerable tailwheel. The 54 cm (21 in) wide cockpit features a pilot seat inclined at a 33° angle.

EEL ULF 2 ULF2 Light Aircraft DB amp Sales

The recommended engine is from a Citroen Visa automobile, which consumes 4.0 l/hr (1.06 US gallon per hour) and produces 24 kW (32 hp). The engine retains its automobile muffler and catalytic converter, runs on unleaded auto fuel, stored in a fuselage-mounted aluminium fuel tank with a capacity of 33 litres (7.3 imp gal; 8.7 US gal). The propeller is powered via a belt reduction drive. The muffler system allows the aircraft to comply with the ICAO Annex 16, Chapt. 10 noise requirements of 55 dB(A).

The aircraft's wings fold on gimbal joints for storage or ground transportation in a trailer.

The ULF 2 received its Certificate of Airworthiness in February 1995. As a result of his design work Reich received the OUV Hans-Becker-Prize in June 1997. The plans consists of 29 sheets of blueprints, a 50-page construction manual and a 20-page flight manual, available in both English and German. The plans cost €350 and a completed aircraft is estimated to cost €8000.

The aircraft has very benign stall characteristics, resulting in a controllable slow speed mush condition.

Operational history

The first ULF 2 completed by a customer was flown in 1999 and a total of 15 have been finished and flown.

Specifications (ULF 2)

Data from World Directory of Leisure Aviation 2003-04 and company website

General characteristics

  • Crew: one
  • Wingspan: 11 m (36 ft 1 in)
  • Wing area: 13.9 m2 (150 sq ft)
  • Aspect ratio: 8.7:1
  • Airfoil: Wortmann FX 63-137
  • Empty weight: 210 kg (463 lb)
  • Gross weight: 323 kg (712 lb)
  • Fuel capacity: 33 litres (7.3 imp gal; 8.7 US gal)
  • Powerplant: 1 × Citroen Visa two cylinder, four stroke, horizontally opposed automobile engine with belt reduction drive, 24 kW (32 hp)
  • Propellers: 2-bladed wooden

    • Performance

  • Cruising speed: 120 km/h (75 mph; 65 kn)
  • Stall speed: 50 km/h (31 mph; 27 kn)
  • Never exceed speed: 140 km/h (87 mph; 76 kn)
  • g limits: +6/-3
  • Maximum glide ratio: 14:1
  • Rate of climb: 3.0 m/s (590 ft/min)
  • Rate of sink: 1.1 m/s (220 ft/min)

    • References

    EEL ULF 2 Wikipedia
    (Text) CC BY-SA