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Warsaw University of Technology RWD 7




The RWD 7 was constructed by the RWD team of Stanisław Rogalski, Stanisław Wigura and Jerzy Drzewiecki in Warsaw. It was based upon their earlier designs, especially the RWD 2 and RWD 4. The RWD 7 was meant to be a record-beating plane, so it had a more powerful engine, while its mass was reduced. From its predecessors, it took the same fish-shaped fuselage without a direct view towards forward from the pilot's seat.

The RWD 7 was a wooden construction, conventional in layout, high-wing cantilever monoplane. The fuselage was rectangular in cross-section (narrowing in upper part), plywood-covered, apart from the engine section, which was aluminium sheet-covered. The wings were trapezoid, single-spar, single part, canvas and plywood covered. A crew of two was sitting in tandem, with a pilot in the rear cab. The crew cabs were open on upper sides, and had doors on the right side. The engine was 5-cylinder Armstrong Siddeley Genet II radial engine, 56 kW (75 hp) nominal power. Two-blade wooden propeller of a fixed pitch. The plane had a conventional landing gear, with a rear skid. A 30 l fuel tank was in central part of wing. A cruise fuel consumption was 18 l/hour.

The only RWD 7 built (registration SP-AGH) was flown in July 1931 by its designer Jerzy Drzewiecki. On August 12, 1931, Drzewiecki and Jerzy Wędrychowski established an international FAI speed record of 178 km/h (111 mph) in the light touring plane class, (below 280 kg / 616 lb empty weight). On September 30, 1932, Drzewiecki and Antoni Kocjan set a height record of 6,023 m (19,755 ft). The RWD 7 was used in Warsaw Aero Club, among others, for aerobatics, then in 1936 it was bought by a known aviator Zbigniew Babiński for touring flights and used until 1938.

The RWD 7 was known for its extremely short take-off run: with a single crew member only 18 m (59 ft), with two crew members, 30 m (98 ft).


Engine: 1 × Armstrong Siddeley Genet II, 75 hp (56 kW)
Length: 9.8 m (32 ft 2 in)
Wingspan: 6.3 m (20 ft 8 in)
Wing area: 13.60 sq.m (146 sq.ft)
Height: 2.0 m (6 ft 7 in)
Empty weight: 246 kg (541 lb)
Loaded weight: 440 kg (968 lb)
Useful load: 194 kg
Maximum speed: 186 km/h (116 mph)
Cruise speed: 160 km/h
Stall speed: 65 km/h
Range: 260 km (163 miles)
Service ceiling: 6,000 m (19,680 ft)
Rate of climb: 6.2 m/s (1,220 ft/min)
Wing loading: 32 kg/sq.m (6.6 lb/sq.ft)
Power/mass: 0.23 kW/kg
Take-off run: 18-30 m
Crew: 1
Capacity: 1







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