SDB Karat
{{Short description|Russian ultralight trike}}
{{Use dmy dates|date=January 2022}}
{{Use American English|date=January 2022}}
| {{Infobox aircraft begin
| name=Karat | image= | caption= }}{{Infobox aircraft type | type=Ultralight trike | national origin=Russia | manufacturer=SDB | designer= | first flight= | introduced= | retired= | status= Production completed | primary user= | more users= | produced= | number built= | developed from= | variants with their own articles= }} |
The SDB Karat is a Russian ultralight trike that was designed and produced by SDB of Moscow. The aircraft was supplied as a complete ready-to-fly-aircraft.Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 220. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
SDB was an enterprise of the Moscow State Technical University of Civil Aviation. The SDB website has been removed from the internet and the enterprise seems to have gone out of business, ending production of the Karat.Internet Archive, [https://web.archive.org/web/*/http://www.sdbmstu.agava.ru Archives for www.sdbmstu.agava.ru], dated 29 August 2013, retrieved 29 August 2013
Design and development
The Karat is a nanotrike that was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of {{convert|254|lb|kg|0|abbr=on}}. The aircraft has a standard empty weight of {{convert|201|lb|kg|0|abbr=on}}. It features a cable-braced hang glider-style high-wing, weight-shift controls, a single-seat open cockpit without a cockpit fairing, tricycle landing gear and a single engine in pusher configuration.
The aircraft is made from bolted-together aluminum tubing, with its single or double surface wing covered in Dacron sailcloth. It was designed to be light enough to accept any hang glider wing with a high enough gross weight. A typical wing used would have a {{convert|9.8|m|ft|1|abbr=on}} span, be supported by a single tube-type kingpost and use an "A" frame weight-shift control bar. The standard powerplant is a single cylinder, air-cooled, two-stroke, {{convert|28|hp|kW|0|abbr=on}} Hirth F33 engine. The aircraft has an empty weight of {{convert|91|kg|lb|0|abbr=on}} and a gross weight of {{convert|220|kg|lb|0|abbr=on}}, giving a useful load of {{convert|129|kg|lb|0|abbr=on}}. With full fuel of {{convert|30|L}} the payload is {{convert|107|kg|lb|0|abbr=on}}.
When it was available the trike was sold as a fuselage frame and engine, with the customer providing the hang glider wing.
Specifications (Karat)
{{Aircraft specs
|prime units?=met
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|crew=one
|capacity=
|length m=
|length ft=
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|length note=
|span m=9.8
|span ft=
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|height ft=
|height in=
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|wing area sqm=10.0
|wing area sqft=
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|airfoil=
|empty weight kg=91
|empty weight lb=
|empty weight note=
|gross weight kg=220
|gross weight lb=
|gross weight note=
|fuel capacity={{convert|30|L}}
|more general=
|eng1 number=1
|eng1 name=Hirth F33
|eng1 type=single cylinder, air-cooled, two stroke aircraft engine
|eng1 kw=
|eng1 hp=28
|prop blade number=2
|prop name=wooden
|prop dia m=
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|max speed kmh=125
|max speed mph=
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|cruise speed kmh=90
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|stall speed kmh=45
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|climb rate ms=2.1
|climb rate ftmin=
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|wing loading kg/m2=22.0
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}}
References
{{reflist}}
External links
- [https://web.archive.org/web/*/http://www.sdbmstu.agava.ru Company website archives] on Archive.org
- [https://web.archive.org/web/20131217235501/http://www.appulma.org/images/karat_sdb.jpg Photo of the SDB Karat]
Category:2000s Russian sport aircraft
Category:2000s Russian ultralight aircraft