[1][2] The TST-1 was the first motor glider in a long line of aircraft produced by the company.
The design goals included that it should be economical to build and operate as well as easy to fly, with outstanding soaring capabilities with the engine shut down.
The 12.6 m (41 ft) span wing employs a Wortmann FX 61-184 airfoil.
The engine is mounted in pusher configuration in a faired pod on a short non-retractable strut, above and behind the cockpit.
Prices in 1998 were US$325 for the plans, US$9,840 for the standard kit and US$15,250 for the completed aircraft.