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词条 EEL ULF 2
释义

  1. Design and development

  2. Operational history

  3. Specifications (ULF 2)

  4. See also

  5. References

  6. External links

name=ULF 2 image= caption=

}}{{Infobox Aircraft Type

 type=Motor glider national origin=West Germany manufacturer=Entwicklung und Erprobung von Leichtflugzeugen (EEL) designer=Dieter Reich first flight=October 1993 introduced= retired= status= primary user= more users= produced= number built=15 program cost= unit cost= €8000 (estimated completion cost) developed from= variants with their own articles=
}}

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 ({{lang-en|Development and Testing of Light Aircraft}}) for amateur construction.[1][2]

Design and development

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.[2]

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 {{convert|11|m|ft|1|abbr=on}} 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 {{convert|54|cm|in|0|abbr=on}} wide cockpit features a pilot seat inclined at a 33° angle.[1][2][3]

The recommended engine is from a Citroen Visa automobile, which consumes 4.0 l/hr (1.06 US gallon per hour) and produces {{convert|24|kW|hp|0|abbr=on}}. 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 {{convert|33|l}}. 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).[1][2][3]

The aircraft's wings fold on gimbal joints for storage or ground transportation in a trailer.[2]

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.[2][4]

The aircraft has very benign stall characteristics, resulting in a controllable slow speed mush condition.[2]

Operational history

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

Specifications (ULF 2)

{{Aircraft specs
|ref=World Directory of Leisure Aviation 2003-04 and company website[1][3]
|prime units?=met


|genhide=
|crew=one
|capacity=
|length m=
|length ft=
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|length note=
|span m=11
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|height m=
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|height in=
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|wing area sqm=13.9
|wing area sqft=
|wing area note=
|aspect ratio=8.7:1
|airfoil=Wortmann FX 63-137
|empty weight kg=210
|empty weight lb=
|empty weight note=
|gross weight kg=323
|gross weight lb=
|gross weight note=
|fuel capacity={{convert|33|l}}
|more general=


|eng1 number=1
|eng1 name=Citroen Visa
|eng1 type=two cylinder, four stroke, horizontally opposed automobile engine with belt reduction drive
|eng1 kw=24
|eng1 hp=
|prop blade number=2
|prop name=wooden
|prop dia m=
|prop dia ft=
|prop dia in=
|prop note=


|perfhide=
|max speed kmh=
|max speed mph=
|max speed kts=
|max speed note=
|cruise speed kmh=120
|cruise speed mph=
|cruise speed kts=
|cruise speed note=
|stall speed kmh=50
|stall speed mph=
|stall speed kts=
|stall speed note=
|never exceed speed kmh=140
|never exceed speed mph=
|never exceed speed kts=
|never exceed speed note=
|range km=
|range miles=
|range nmi=
|range note=
|endurance=
|ceiling m=
|ceiling ft=
|ceiling note=
|g limits=+6/-3
|roll rate=
|glide ratio=14:1
|climb rate ms=3.0
|climb rate ftmin=
|climb rate note=
|sink rate ms=1.1
|sink rate ftmin=
|sink rate note=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=
|wing loading note=
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|avionics=
}}

See also

{{aircontent
|see also=
  • List of gliders

|related=
|similar aircraft=
  • US Aviation Cumulus

|lists=
}}

References

1. ^1 2 3 Bertrand, Noel; Rene Coulon; et al: World Directory of Leisure Aviation 2003-04, page 136. Pagefast Ltd, Lancaster OK, 2003. ISSN 1368-485X
2. ^1 2 3 4 5 6 7 {{Cite web|url = http://www.eel.de/english/ulf-2_description.htm|title = ULF 2 Description|accessdate = 14 October 2011|last = Entwicklung und Erprobung von Leichtflugzeugen|authorlink = |year = n.d.}}
3. ^1 2 {{Cite web|url = http://www.eel.de/english/ulf-2_techdata_en.htm|title = ULF 2 Technical Data|accessdate = 14 October 2011|last = Entwicklung und Erprobung von Leichtflugzeugen|authorlink = |year = n.d.}}
4. ^{{Cite web|url = http://www.eel.de/english/order.htm|title = Order Info|accessdate = 14 October 2011|last = Entwicklung und Erprobung von Leichtflugzeugen|authorlink = |year = n.d.}}

External links

  • {{Official website|http://www.eel.de/english/ulf-2_description.htm}}
{{EEL aircraft}}

3 : German sailplanes 1990–1999|Homebuilt aircraft|Entwicklung und Erprobung von Leichtflugzeugen aircraft
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