TYPE: Side-by-side ultralight kitbuilt.
PROGRAMME: Prototype first flight 16 June 1980, designed by Bob Walters. Available as kit or as plans.
CURRENT VERSIONS: Dragonfly Mark I: Original configuration, with non-retractable mainwheels at tips of foreplane. EAA Oshkosh Outstanding Design, 1980.
Dragonfly Mark II: In parallel production, for operation from unprepared strips and narrow taxiways. Main landing gear in short non-retractable cantilever units under wings, with individual hydraulic toe brakes, and increased foreplane and elevator areas; wheel track 2.44 m (8 ft).
Dragonfly Mark III: Flight tested in 1985; non-retractable, narrow-track tricycle landing gear with steerable nosewheel and cantilever mainwheel legs attached to fuselage. Mark III Millenium displayed at EAA AirVenture, Oshkosh, July 2001 (N204AS, then unflown) as conversion of earlier aircraft. Recommended engines: 59.7 kW (80 hp) Jabiru 2200 flat-four or 89 kW (120 hp) Jabiru 3300 flat-six.
CUSTOMERS: More than 100 kits delivered, together with 2,000 sets of plans; some 70 kitbuilt and more than 430 plans-built aircraft flying.
COSTS: Standard kit, including Jabiru 2200 engine, US$38,500 (2003).
DESIGN FEATURES: Unconventional shoulder-wing monoplane with equal-span foreplane; latter also mounting landing gear in one of two alternative locations.
Quoted build time 1,000 hours, or 500 hours for quick-build kit.
Wing section Eppler 1213. Foreplane GU25 section. Thickness/chord ratio 15 per cent; dihedral 3° no incidence or sweepback. Foreplane t/c 17 per cent; anhedral 3° on Mk I or dihedral on Mk II; incidence -1°; no sweepback.
FLYING CONTROLS: Manual. Ailerons on inboard trailing-edge of wing; near full-span elevators on foreplane; horn-balanced rudder. Flettner tab on each foreplane.
STRUCTURE: Composites wing, foreplane and tail unit structures of styrene foam, glass fibre, carbon fibre and epoxy. Semi-monocoque fuselage, formed (not carved) from 12.5 mm (½ in) thick urethane foam, with strips of 18 mm (¾ in) foam bonded along edges to allow large-radius external corners. Fuselage covered with glass fibre inside and out.
LANDING GEAR: See Current Versions. Brakes fitted.
POWER PLANT: Mks I and II have one 44.5 kW (60 hp) 1,835 cc modified Volkswagen motorcar engine; 1,600 cc engine, rated at 33.5 kW (45 hp), optional. Fuel capacity 56.8 litres (15.0 US gallons; 12.5 Imp gallons).