TYPE: Tandem-seat kitbuilt.

PROGRAMME: Modernised kitbuilt version of 1937 Piper J3. Sport Trainer first flew 12 March 1975.

CURRENT VERSIONS: Sport Trainer: Basic two-seat design. Quoted build time of 1,200 hours; conforms to FAA 51 per cent rule.
Description applies to Sport Trainer.
Acro Trainer: Differs from standard version by having strengthened fuselage, shortened wings (8.23 m; 27 ft 0 in), modified lift struts, improved wing fittings and rib spacing, and new leading-edge.
Observer: Replica of Piper L-4 military liaison aircraft.
Super Sport: Structural modifications to accept engines of up to 112 kW (150 hp), making it suitable for glider towing, bush operations, or as floatplane.

CUSTOMERS: 4,193 sets of plans and kits sold by mid-2001.

COSTS: Plans: US$69.50; kit US$17,000 (2003).

DESIGN FEATURES: High-wing cabin monoplane with braced wings and tailplane.

FLYING CONTROLS: Conventional and manual. Horn-balanced rudder.

STRUCTURE: Fuselage and empennage of welded 4130 chrome molybdenum steel tube with fabric covering; wooden wing with light alloy leading-edge and fabric covering.

LANDING GEAR: Tailwheel type; fixed. Welded steel tube side Vs and half-axles. Bungee shock-absorbers. Speed fairings.

POWER PLANT: Can be powered by any flat-four Teledyne Continental, Franklin or Textron Lycoming engine between 48.5 and 93 kW (65 and 125 hp). Standard fuel capacity 45.4 litres (12.0 US gallons; 10.0 Imp gallons); auxiliary fuel capacity 98.4 litres (26.0 US gallons; 21.7 Imp gallons).

ACCOMMODATION: Two persons in tandem. Horizontally split door on starboard side.