The TeST TST-14 Bonus is a
Czech high-wing,
T-tailed, two-seats-in-
tandem glider and
motor glider, designed and produced by
TeST Gliders
TeST Gliders is a manufacturer of ultralight sailplanes and motorgliders based in Brno, Czech Republic.Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', pages 305 and 362. BAI Communications, July 1998. Downey, Julia: ''1999 Kit Air ...
.
[Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', page 137. WDLA UK, Lancaster UK, 2011. ]
Design and development
The TST-14 motor glider was designed for private owner and flying school use and as such features wing tip wheels that allow independent taxiing and take-off.
The TST-14 is constructed from composite materials, with the
forward-swept wing
A forward-swept wing is an aircraft wing configuration in which the quarter-chord line of the wing has a forward sweep. Typically, the leading edge also sweeps forward.
Characteristics
The forward-swept configuration has a number of character ...
a ribless composite sandwich structure. Each wing weighs and has a single
spar made with a
carbon fibre composite flange plate and a
polyurethane foam/
fibreglass composite web plate. Glidepath control is by upper surface
air brakes made from
aluminium. The motor glider version is powered by a retractable
Rotax 503UL
The Rotax 503 is a , inline 2-cylinder, two-stroke aircraft engine, built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft.Raisner, William: ''LEAF catlog'', pages 6-105. Leading Edge Airfoils, 1995.
As of 2011 the Rot ...
two-stroke powerlant. Extension and retraction of the engine is fully automatic, controlled with two cockpit-mounted buttons and actuated by two electric servo motors. The
landing gear consists of dual
fuselage-mounted tandem mainwheels and
wing tip-mounted wheels.
The aircraft was
type certified to the
Joint Aviation Authorities JAR 22 standard for gliders on 10 Dec 2001. The TST-14 was not certified in the
United States as the company explains, "due to the expense involved". The aircraft can be
registered
Registered may refer to:
* Registered mail, letters, packets or other postal documents considered valuable and in need of a chain of custody
* Registered trademark symbol, symbol ® that provides notice that the preceding is a trademark or service ...
with the US
Federal Aviation Administration as a
Special Light Sport Aircraft glider or in the ''Experimental - racing/exhibition'' category.
Variants
;TST-14 Bonus
:Pure glider version, with a gross weight of
;TST-14M
:Main production motor glider version, powered by a
Rotax 503UL
The Rotax 503 is a , inline 2-cylinder, two-stroke aircraft engine, built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft.Raisner, William: ''LEAF catlog'', pages 6-105. Leading Edge Airfoils, 1995.
As of 2011 the Rot ...
two-stroke powerlant
Specifications (TST-14M)
See also
References
External links
*
Photo of TST-14 in flightPhoto of TST-14M showing engine installation
{{TeST Gliders
TST-14
Motor gliders
2000s Czech sailplanes
Light-sport aircraft
High-wing aircraft
T-tail aircraft