Its structure comprised a wooden frame covered with heat-shrunk Solarfilm model aircraft film.
[1] The resulting aircraft, at 230 lb (104 kg), proved too heavy for human-powered flight and so To converted it to solar power.
A nose-mounted pod powerplant was installed consisting of four 1 hp (1 kW) permanent magnet 36 V DC, 12 A Bosch electric motors, powered by a 65 lb (29 kg) Nickel-cadmium battery pack of 24 cells with a total capacity of 25 AH, connected in series to give a maximum (open-circuit) output voltage of approximately 29 V. The motors drive a 63 in (160 cm) two-bladed propeller via a 3:1 bicycle-chain reduction gear.
At the hands of pilot Ken Stewart, a successful flight took place on 13 June 1979, covering just under 0.75 mi (1.2 km).
[1][2] A planned flight across the English Channel was abandoned when it was found that the aircraft did not meet its endurance targets.