| 释义 |
- Design and development
- Operational history
- Variants
- Specifications (890USKh crop-sprayer, Rotax 912 ULS engine)
- References
| name=Aviatika-MAI-890 | image=Aviatika-MAI 890U.jpg | caption=Aviatika-MAI 890U }}{{Infobox Aircraft Type | type=1 or 2 seat ultralight | national origin=Russia | manufacturer=RSK 'MiG' | designer= | first flight=July 1987 | introduced=1991 | retired= | status=In production (2015) | primary user= | more users= | produced= | number built=More than 300 by 2006 | program cost= | unit cost= MAI-890U with Rotax 912 ULS (2008):
€34,250 | developed from= | variants with their own articles=
}} |
The Aviatika-MAI-890 is a pod-and-boom, pusher configuration biplane ultralight designed and built by the Moscow Aviation Institute (MAI) in Russia in the 1980s. As well as being a sport and training aircraft, significant numbers have been used for agricultural spraying. It remained in production in 2015. Design and developmentThe MAI-890 design originated and was developed by the Experimental Aircraft design section, known as OSKBES, of the School of Aeronautics at the MAI. From about 1990 the MAI design bureau became part of the Aviatika joint-stock company to facilitate aircraft production, so that for much of the 1990s the 890 was an Aviatika product. In 1998 MAI acquired the production rights from Aviatika and marketed it as the Aviatika-MAI-890. The starting point was the open cockpit, short span Junior which appeared in 1987 and developed into the full-span, enclosed seat prototype MAI-89 in 1989. The production prototype, designated MAI-890, followed the next year and production began in 1991. Since then two seat and agricultural versions have been produced. The MAI-890 has a structure of mixed aluminium, titanium and steel alloys and is fabric covered. It is an unequal span biplane with a straight lower wing of constant chord and some dihedral, which carries full span ailerons. The upper wing has greater span, some sweep but no dihedral, with constant chord over much of its span but with taper on the outer panels. It is a single bay biplane with one, slender interplane strut on each side assisted by flying wires; at its centre, the upper wing is fixed to the underwing engine mounting. Enclosed single or side-by-side seating is positioned ahead of the lower wing leading edge. A slender boom from the bottom of the fuselage pod carries the empennage; all tail surfaces are straight edged and strongly tapered and have generous control areas, with ground-adjustable trim tabs on the elevators. All current MAI-890 are powered by Rotax engines mounted in pusher configuration, the type depending on the aircraft variant and option. It has a short-legged, fixed tricycle undercarriage with cantilever main legs attached the boom behind the cabin. Operational historyMore than 300 aircraft were reported sold by 2006, about 60 of them agricultural variants, about 30 exported to South Africa.[ 26 MAI-89s and -890s appeared in the civil aircraft registers of European countries outside Russia in mid-2010.[8]] VariantsData from Jane's All the World's Aircraft 2011/12- Junior
- Open cockpit single seater with short span (5.68 m; 18 ft 7.5 in); maximum take-off weight (MTOW) 282 kg (617 lb). First flew July 1987.
- MAI-89
- longer span (8.11 m; 26 ft 7.5 in); MTOW 340 kg (750 lb). Flown 1989.
- MAI-890
- Production version, flown 1990 and produced from 1991 with interruption in mid-1990s but with a 2002 statement that production continued. Single seater.
- MAI-890U
- Two side-by-side seats. First flown August 1991 with 48 kW (64 hp) Rotax 582 UL engine; standard engine, first flown 16 September 1992, is the Rotax 912 UL. MTOW 540 kg (1,190 lb). Floatplane version tested 2000.
- Aviatika-MAI-890SKh Farmer
- Single seat, MAI-890 based, Rotax 912 ULS or Rotax 582 powered crop-spraying version, with a spraybar aft of the lower wing s fed from a tank below the engine.
- Aviatika-MAI-890USKh
- Two seat, MAI-890U based crop-spraying version.
- Aviatika-MAI-890S
- South African designation of prototype converted to Rotax 912 ULS; in Russian terms a MAI-890.
- 980U Mai
- South African name for MAI-890U.
- 980CSH Mai
- South African name for agricultural version.
Specifications (890USKh crop-sprayer, Rotax 912 ULS engine) {{Aircraft specs
|ref=Jane's All the World's Aircraft 2011/12
|prime units?=met
|genhide=
|crew=2
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|length m=5.32
|length note=including long nose mounted pitot
|upper span m=8.11
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|lower span in=
|lower span note=
|height m=2.25
|height note=to fin tip
|wing area sqm=14.29
|wing area note=gross
|aspect ratio=
|airfoil=
|empty weight kg=350
|empty weight note=
|gross weight kg=
|gross weight lb=
|gross weight note=
|max takeoff weight kg=540
|max takeoff weight note=
|fuel capacity=50 L (13.2 US gal; 11.0 Imp gal)
|more general=
|eng1 number=1
|eng1 name=Rotax 912 ULS
|eng1 type=air- and liquid-cooled flat-four
|eng1 kw=73.5
|eng1 note=
|power original=
|more power=
|prop blade number=2
|prop name=VV-98E-11
|prop dia m=
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|perfhide=
|max speed kmh=110
|max speed note=
|cruise speed kmh=100
|cruise speed note=maximum
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|never exceed speed kmh=
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|range km=
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|endurance=2 h 53 mim
|ceiling m=
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|ceiling note=
|g limits=+5/-2.5
|roll rate=
|climb rate ms=2.1
|climb rate note=maximum at sea lvel
|time to altitude=
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- Take-off run: 90 m (295 ft)
- Landing run: 150 m (495 ft)
|avionics=
}}{{aircontent
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}}References1. ^Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition, page 113. BAI Communications, 15 July 1998. {{ISBN|0-9636409-4-1}}
2. ^Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 71. Flying Pages Europe SARL, 2015. {{ISSN|1368-485X}}
3. ^1 {{cite book |title=European registers handbook 2010 |last= Partington |first=Dave |coauthors= |edition= |year=2010|publisher= Air Britain (Historians) Ltd|location= |isbn=978-0-85130-425-0|page=}}
}}{{OSKBES aircraft}} 5 : Biplanes|Agricultural aircraft 1990–1999|Soviet civil utility aircraft 1980–1989|Single-engined pusher aircraft|Aircraft first flown in 1987 |