TeST TST-7 Junior
{{Short description|Czech motorglider}}
{{Use dmy dates|date=December 2022}}
{{Use British English|date=December 2022}}
| {{Infobox Aircraft Begin
| name=TST-7 Junior | image= | caption= }}{{Infobox Aircraft Type | type=Motor glider | national origin=Czech Republic | manufacturer=TeST | designer= | first flight= | introduced= | retired= | status=Production completed | primary user= | more users= | produced= | number built=5 (1998) | developed from= TeST TST-1 Alpin | variants with their own articles=TeST TST-9 Junior }} |
The TeST TST-7 Junior is a Czech shoulder-wing, single-seat motor glider that was designed and produced by TeST of Brno. When it was available the aircraft was supplied as plans, in kit form for amateur construction or as a complete ready-to-fly aircraft. Production is now complete and the aircraft is no longer available new.Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, page 306. BAI Communications, July 1998. {{ISBN|0-9636409-4-1}}Downey, Julia: 2001 Kit Aircraft Directory, Kitplanes, Volume 17, Number 12, December 2000, page 78. Kitplanes Acquisition Company. {{ISSN|0891-1851}}Downey, Julia: 1999 Kit Aircraft Directory, Kitplanes, Volume 15, Number 12, December 1998, page 72. Primedia Publications. {{ISSN|0891-1851}}
Design and development
The TST-7 Junior was a development of the TST-1 Alpine self-launching sailplane, with a design goal of producing an aircraft more suited for use as a touring motor glider with docile handling.
The TST-7 is built from wood, with some fibreglass parts. The {{convert|12.6|m|ft|1|abbr=on}} span, shoulder-mounted, slightly forward-swept wing employs a Wortmann FX 61-184 airfoil and has top-surface air brakes. The landing gear is of tricycle configuration, making ground handling the aircraft much easier than the monowheel gear used on the TST-1. The standard engine was initially the custom-built M 125 of {{convert|30|kW|hp|0|abbr=on}} and later the Rotax 447 of {{convert|30|kW|hp|0|abbr=on}}. The aircraft can accept engines of {{convert|30|to|37|kW|hp|0|abbr=on}}. The cabin width is {{convert|58|cm|in|0|abbr=on}}.{{Cite web|url = http://www.ae.illinois.edu/m-selig/ads/aircraft.html|title = The Incomplete Guide to Airfoil Usage|accessdate = 9 September 2011|last = Lednicer|first = David|authorlink = |year = 2010|archive-date = 20 April 2010|archive-url = https://web.archive.org/web/20100420012244/http://www.ae.illinois.edu/m-selig/ads/aircraft.html|url-status = dead}}
The aircraft was supplied as a standard kit rated at 400 hours for completion and that did not include the powerplant. An Express-Build kit was also available that could be completed in 250 hours. The factory also built some TST-7s as ready-to-fly models that were US$16,250 in 1998 with the M 125 engine and US$17,540 in 2000 with the Rotax powerplant. The plans cost US$350 in 2000.
Specifications (TST-7 Junior)
{{Aircraft specs
|prime units?=met
|genhide=
|crew=one
|capacity=
|length m=
|length ft=19.20
|length in=
|length note=
|span m=
|span ft=41.3
|span in=
|span note=
|height m=
|height ft=
|height in=
|height note=
|wing area sqm=
|wing area sqft=119.4
|wing area note=
|aspect ratio=
|airfoil=Wortmann FX 61-184
|empty weight kg=
|empty weight lb=395
|empty weight note=
|gross weight kg=
|gross weight lb=649
|gross weight note=
|fuel capacity={{convert|19|L}}
|more general=
|eng1 number=1
|eng1 name=M 125
|eng1 type=two stroke
|eng1 kw=30
|eng1 hp=
|prop blade number=2
|prop name=feathering
|prop dia m=
|prop dia ft=
|prop dia in=
|prop note=
|perfhide=
|max speed kmh=
|max speed mph=110
|max speed kts=
|max speed note=
|cruise speed kmh=
|cruise speed mph=75
|cruise speed kts=
|cruise speed note=
|stall speed kmh=
|stall speed mph=37
|stall speed kts=
|stall speed note=in the landing configuration
|never exceed speed kmh=
|never exceed speed mph=
|never exceed speed kts=
|never exceed speed note=
|range km=
|range miles=230
|range nmi=
|range note=
|endurance=
|ceiling m=
|ceiling ft=12000
|ceiling note=
|g limits=
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=900
|climb rate note=
|sink rate ms=
|sink rate ftmin=
|sink rate note=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=
|wing loading note=
|more performance=
|avionics=
}}
See also
References
{{reflist}}
External links
- [http://www.airliners.net/photo/TeST-TST-7-Junior/1812095/L/ Photo of TeST TST-7 Junior]
{{TeST Gliders}}