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Gigax Microstar


Single-seat single-engined high-wing monoplane with conventional three-axis control. Wing has unswept leading and trailing edges, and constant chord; cruciform tail. Pitch control by elevator on tail; yaw control by fin-mounted rudder; roll control by spoilers; control inputs through stick for pitch/roll and pedals for yaw. Wing braced from above by kingpost and cables, from below by cables; wing profile 80% double-surface. Undercarriage has three wheels in tricycle formation with additional tailskid; no suspension on nosewheel and steel-spring suspension on main wheels. Push-right go-right nosewheel steering connected to yaw control. No brakes. Aluminium-tube framework, without pod. Engine mounted at wing height driving tractor propeller. Leading edges of the wing are stiffened with polyester under the Dacron covering.

Designed and built by Hans Gigax, the Microstar, which made its first flight at the beginning of 1981 and was shown by Hans at the annual homebuilders' meet at Brienne-le-Chateau in France. The machine went on sale in 1982 from ASW, which has ceased to produce aircraft in Switzerland at the beginning of 1983. The Microstar was directly involved in a fatal accident in West Germany in 1982 which led the maker to stiffen its empennage by two additional tubes.

Having acquired the licence to build and sell the single-seater Microstar as designed by Hans Gigax, the ASW company embarked in 1982 on the production of several examples as the Microstar Mark I. The distribution seems to have been very small, but at least one Microstar was exported to France, bought by the French agent of the Swiss parent company.

Length overall 17.1ft, 5.20m.
Wing span 33.6ft, 10.20m.
Constant chord 4.4ft, 1.32 m.
Sweepback 0 deg.
Total wing area 145 sq.ft, 13.4 sq.m.
Wing aspect ratio 7.8/1.
Engine: Konig SC430, 24 hp at 4200 rpm.
Propeller diameter 43 inch, 1.09 m.
No reduction.
Max static thrust 132 lb, 60 kg.
Power per unit area 0.17 hp/sq.ft, 1.8 hp/sq.m.
Fuel capacity 5.3 US gal, 4.4 Imp gal, 20.0.
Empty weight 154lb, 70kg.
Max take-off weight 441 lb, 200 kg.
Payload: 287 lb, 130 kg.
Max wing loading: 3.05 lb/sq.ft, 14.9 kg/sq.m.
Max power loading 18.4 lb/hp, 8.3kg/hp.
Load factors: +6.0, -3.0 ultimate.
Max level speed 50 mph, 80 kph.
Never exceed speed 68 mph, 110 kph.
Max cruising speed 44 mph, 70 kph.
Economic cruising speed 24mph, 40kph.
Stalling speed 17 mph, 28 kph.
Max climb rate at sea level 250ft/min, 1.5m/s.
Take-off distance 65ft, 20m.
Landing distance 50ft, 15 m.
Service ceiling 11,480 ft, 3500 m.

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