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Janowski J-1 Don Quixote

janowskij1

J-1

The prototype Don Quixote designed and built by MR. Janowski in 1974 was powered by a 23-hp two-stroke Saturn engine, also designed by Janowski. Developing 23 hp from 500 cc, the J-1 features a fully enclosed cockpit with access via a lift-up windscreen. The J-1's construction uses traditional materials.
Single-seat single-engined high-wing monoplane with conventional three-axis control. Wing has unswept leading and trailing edges, and constant chord; conventional tail. Pitch control by elevator on tail; yaw control by fin mounted rudder; roll control by ailerons. Wing braced from below by struts; wing profile Clark Y; double-surface. Undercarriage has three wheels in taildragger formation. Fuselage, totally enclosed. Engine mounted above wing driving pusher propeller.

However, several problems were inherent in the two-stroke engine, so the more readily available Volkswagen engine was settled on. The heavier engine called for strengthening the airplane’s structure. To over the widest range of homebuilders in various countries, it was decided that the Don Quixote would make use of conven-tional wood an fabric along with more modern polyurethane foam and epoxy/fiberglass . The J-1 B can withstand loading of + 4G and - 2.3, but in the foam  / fiberglass version of the plane, + 6.3 and -3.3 are possible. Construction of the plane follows conventional building rules, with spruce wood, birch plywood and flat sheets of plexiglass as basic materials.

J-1
Length overall 16.0ft, 4.88m.
Height overall 4.6ft, 1.40m.
Wing span: 24.9ft, 7.60m.
Constant chord 3.2 ft, 0.99 m.
Sweepback 0 deg.
Total wing area 81 sq.ft, 7.5 sq.m.
Wing aspect ratio 7.74.
Engine: Saturn, 25 hp.
Max take-off weight 595 lb, 270 kg.
Max wing loading 7.37 lb/sq.ft, 36.0kg/sq.m.
Max power loading 23.8 lb/hp, 10.8 kg/hp.
Max level speed 81mph, 130kph.
Cruising speed 68mph, 110 kph.
Stalling speed 37 mph, 60 kph.
Max climb rate at sea level 590ft/min, 3.0m/s.
Range at average cruising speed 171 mile, 275 km.

J-1B
Engine 25-50 hp.
Wingspan: 24 ft 7.25in.
Wing Chord: 3 ft 3 in.
Length: 16 ft 4.75 in.
Height: 4 ft 5.75 in.
Empty Weight: 286 lbs.
Maximum Weight: 551 lbs.
Maximum Speed, Level Flight: 103 mph.
Cruise speed: 75 mph.
Stall speed: 41 mph.
Take-off Run: 328 ft.
Landing Roll: 164 ft.
Fuel Capacity: 4.4 Imp gal.
Nominal Range: 248 miles.

Engine: Volkswagen, 23 hp
Top speed 84 mph.
Cruise 77 mph.
Stall 39 mph.
Climb rate 244 fpm.
Ceiling 6820 ft.
Range 310 mile
Takeoff run 761 ft.
Land-ing run (50ft) 1256 ft

 


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