The Preceptor STOL King is an American STOL amateur-built aircraft that was designed and produced by Preceptor Aircraft, of Rutherfordton, North Carolina. When it was available the aircraft was supplied as plans or as a kit for amateur construction.^[1][2][3]

Design and development

The STOL King features a strut-braced high-wing, a two-seats-in-tandem enclosed cockpit that is 32.5 in (83 cm) wide, fixed conventional landing gear and a single engine in tractor configuration.^[1][2][3]

The aircraft fuselage is made from welded steel tubing, with the wings of aluminum structure, with its flying surfaces covered in doped aircraft fabric. Its 31.5 ft (9.6 m) span wing has an area of 158.2 sq ft (14.70 m²) and is fitted with flaps and leading edge slots. The wing is supported by "V"-struts and jury struts and can be folded for ground transportation or storage. Acceptable installed power is 75 to 150 hp (56 to 112 kW). Engines used include the 75 hp (56 kW) Volkswagen air-cooled engine, the 108 to 116 hp (81 to 87 kW) Lycoming O-235 and the 150 hp (112 kW) Lycoming O-320 four-stroke powerplants.^[1][2][3]

The aircraft has a stall speed of 15 mph (24 km/h).^[1][2][3]

Operational history

Six examples had been completed and flown by December 2011.^[3]

Specifications (STOL King)

Data from Bayerl and Kitplanes^[1][3]

General characteristics

• Crew: one
• Capacity: one passenger
• Length: 23.8 ft (7.3 m)
• Wingspan: 31 ft 6 in (9.60 m)
• Wing area: 158.2 sq ft (14.70 m²)
• Empty weight: 631 lb (286 kg)
• Gross weight: 1,235 lb (560 kg)
• Fuel capacity: 20 U.S. gallons (76 L; 17 imp gal)
• Powerplant: 1 × Lycoming O-320 four cylinder, air-cooled, four stroke aircraft engine, 150 hp (110 kW)
• Propellers: 2-bladed wooden

Performance

• Maximum speed: 120 mph (200 km/h, 110 kn)
• Cruise speed: 99 mph (160 km/h, 86 kn)
• Stall speed: 15 mph (24 km/h, 13 kn)
• Range: 320 mi (510 km, 280 nmi)
• Rate of climb: 1,200 ft/min (6.1 m/s)
• Wing loading: 7.8 lb/sq ft (38.1 kg/m²)