• Source: RWD 7

The RWD 7 was a Polish sports plane of 1931, constructed by the RWD team.




Development


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 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).




Description


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.




Specifications


Data from Polskie konstrukcje lotnicze 1893–1939General characteristics
Crew: 1
Capacity: 1 / 194 kg (428 lb)
Length: 9.8 m (32 ft 2 in)
Wingspan: 6.3 m (20 ft 8 in)
Height: 2 m (6 ft 7 in)
Wing area: 13.6 m2 (146 sq ft)
Empty weight: 246 kg (542 lb)
Gross weight: 440 kg (970 lb)
Powerplant: 1 × Armstrong Siddeley Genet II 5-cylinder air-cooled radial piston engine, 56 kW (75 hp)
Propellers: 2-bladed fixed-pitch propeller
Performance

Maximum speed: 186 km/h (116 mph, 100 kn)
Stall speed: 65 km/h (40 mph, 35 kn)
Range: 260 km (160 mi, 140 nmi)
Service ceiling: 6,000 m (20,000 ft)
Wing loading: 32 kg/m2 (6.6 lb/sq ft)
Power/mass: 0.23 kW/kg (0.14 hp/lb)
Take-off run: 18–30 m (59–98 ft)




See also



Related development

RWD 1
RWD 2
RWD 3
RWD 4




References

Kata Kunci Pencarian:

• RWD Molenbeek
• Toyota 86
• BMW Seri 3 (E36)
• Nissan Skyline GT-R
• Liga Pro Belgia
• Statuta Roma
• BMW Z4
• MG4 EV
• Royale Union Saint-Gilloise
• Hyundai Ioniq 5
• RWD 7
• RWD (aircraft manufacturer)
• RWD 5
• RWD 6
• RWD 8
• RWD 13
• RWD-14 Czapla
• R.W.D. Molenbeek (2015)
• Mercedes-Benz EQE
• RWD 1