TeST TST-14 Bonus

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.[1][2][3]

TST-14 Bonus
Role Glider and Motor glider
National origin Czech Republic
Manufacturer TeST Gliders
Introduction 2001
Status In production
Variants TeST TST-14J BonusJet

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.[1][3]

The TST-14 is constructed from composite materials, with the forward-swept wing a ribless composite sandwich structure. Each wing weighs 40 kg (88 lb) 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 50 hp (37 kW) Rotax 503UL 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.[1][4][5]

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 with the US Federal Aviation Administration as a Special Light Sport Aircraft glider or in the Experimental - racing/exhibition category.[2][5][6]

Variants
TST-14 Bonus
Pure glider version, with a gross weight of 472.5 kg (1,042 lb)[3]
TST-14M
Main production motor glider version, powered by a 50 hp (37 kW) Rotax 503UL two-stroke powerlant[1]

Specifications (TST-14M)

Data from Sailplane Directory and company website[1][4][5]

General characteristics

  • Crew: one
  • Capacity: one passenger
  • Length: 8.24 m (27 ft 0 in)
  • Wingspan: 17 m (55 ft 9 in)
  • Wing area: 12.01 m2 (129.3 sq ft)
  • Aspect ratio: 24:1
  • Empty weight: 280 kg (617 lb)
  • Gross weight: 450 kg (992 lb)
  • Fuel capacity: 36 litres (7.9 imp gal; 9.5 US gal)
  • Powerplant: 1 × Rotax 503UL two-stroke, twin cylinder inline aero engine, 37 kW (50 hp)
  • Propellers: 2-bladed wooden

Performance

  • Stall speed: 65 km/h (40 mph, 35 kn)
  • Never exceed speed: 205 km/h (127 mph, 111 kn)
  • g limits: +5.2/-2.6
  • Maximum glide ratio: 40:1 at 115 km/h (71 mph; 62 kn)
  • Rate of climb: 2.5 m/s (490 ft/min)
  • Rate of sink: 0.65 m/s (128 ft/min) at 85 km/h (53 mph; 46 kn)
gollark: The gollark method™ could plausibly just do a rolling average.
gollark: Doesn't it update every second?
gollark: And `switchcraft.tps()` just uses the HTTP API internally.
gollark: Obviously it's subject to noise.
gollark: Apparently `sleep` works based on ticks and not real time, so you can calculate the discrepancy between ticks and real time to see roughly what TPS is.

See also

References
  1. Activate Media (2006). "TST-14M Bonus TeST, spol. s r.o." Archived from the original on 2 September 2012. Retrieved 28 August 2011.
  2. TeST Gliders (n.d.). "TST-14 Bonus". Retrieved 28 August 2011.
  3. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 137. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  4. TeST Gliders (n.d.). "TST-14 Specifications". Retrieved 28 August 2011.
  5. TeST Gliders (n.d.). "FAQ". Retrieved 28 August 2011.
  6. TeST Gliders (10 Dec 2001). "TST-14 Type Design". Retrieved 28 August 2011.
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