The prototype J.T.1 Monoplane first flew on 4 July 1959. Plans are available and by early 1991 about 800 sets had been sold. Approximately 110 plans-built Monoplanes have flown. Wood kits are available in Canada and the USA.

TYPE: Single-seat fully aerobatic homebuilt.

AIRFRAME: All-wood structure, with fabric covering part of wings, elevators and rudder, the remainder plywood covered. Wing section RAF48. Non-retractable tailwheel landing gear standard.

POWER PLANT: One 30 kW (40 hp) Volkswagen 1,500 cc modified motorcar engine. Other engines fitted by constructors include a 30 kW (40 hp) Aeronca E 113, 48.5 kW (65 hp) Teledyne Continental A65, 48.5 kW (65 hp) Textron Lycoming, and a 53.7 kW (72 hp) McCulloch. Aircraft with the 48.5 kW (65 hp) engines have a 10 cm (4 in) longer nose and 25 cm (10 in) longer rear fuselage to maintain the correct CG position. Fuel capacity 32 litres (8.4 US gallons; 7 Imp gallons).

DIMENSIONS, EXTERNAL:

  • Wing span: 6.40 m (21 ft 0 in)
  • Length overall: 4.57 m (15 ft 0 in)
  • Height over tail: 1.47 m (4 ft 10 in)
  • Propeller diameter: 1.14 m (3 ft 9 in)

AREA:

  • Wings, gross: 7.06 m² (76.0 sq ft)

WEIGHTS:

  • Weight empty: 195 kg (430 lb)
  • Baggage capacity: 4.5 kg (10 lb)
  • Max T-O weight: 299 kg (660 lb)

PERFORMANCE:

  • Max level speed at S/L: 100 knots (185 km/h; 115 mph)
  • Econ cruising speed: 87 knots (161 km/h; 100 mph)
  • Stalling speed, power off:
    • flaps up: 35 knots (65 km/h; 40 mph)
    • flaps down: 31 knots (57 km/h; 35 mph)
  • Max rate of climb at S/L: 305 m (1,000 ft)/min
  • Service ceiling: 4,115 m (13,500 ft)
  • T-O to 15 m (50 ft): 107 m (350 ft)
  • Landing from 15 m (50 ft): 229 m (750 ft)
  • Range: 252 nm (466 km; 290 miles)
  • Endurance: 3 h
  • g limits: ±6