RWD 7

{{Short description|Polish sports plane of 1931}} {{Infobox aircraft |name =RWD 7 |image =RWD 7 - Drzewiecki Wedrychowski.jpg |caption =Jerzy Drzewiecki and Jerzy Wędrychowski by the RWD 7 |type =Sports plane |manufacturer =Warsaw University of Technology workshops |designer = RWD team |first_flight =July 1931 |introduction =1931 |retired =1938 |status = |primary_user =Polish civilian aviation |more_users = |produced = |number_built =1 |unit cost = |variants = }} 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.<ref name=Glass/>

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).<ref name=Glass/> 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.<ref name=Glass/>

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).<ref name=Glass/>

==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 sat 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.<ref name=Glass/>

==Specifications== {{Aircraft specs |ref=Polskie konstrukcje lotnicze 1893–1939<ref name=Glass>{{cite book|last1=Glass|first1=Andrzej|title=Polskie konstrukcje lotnicze 1893–1939|date=1977|publisher=WKiŁ|location=Warsaw|language=Polish |pages=298–299}}</ref> |prime units?=met  |crew=1 |capacity=1 / {{cvt|194|kg|0}} |length m=9.8 |length note= |span m=6.3 |span note= |height m=2 |height note= |wing area sqm=13.6 |wing area note= |aspect ratio= |airfoil= |empty weight kg=246 |empty weight note= |gross weight kg=440 |gross weight note= |max takeoff weight kg= |max takeoff weight note= |fuel capacity= |more general=  |eng1 number=1 |eng1 name=Armstrong Siddeley Genet II |eng1 type=5-cylinder air-cooled radial piston engine |eng1 hp=75 |eng1 note=

|prop blade number=2 |prop name=fixed-pitch propeller |prop dia m= |prop dia note=  |max speed kmh=186 |max speed note= |cruise speed kmh= |cruise speed note= |stall speed kmh=65 |stall speed note= |never exceed speed kmh= |never exceed speed note= |range km=260 |range note= |ferry range km= |ferry range note= |endurance= |ceiling m=6000 |ceiling note= |g limits= |roll rate= |climb rate ms= |climb rate note= |time to altitude= |wing loading kg/m2=32 |wing loading note= |fuel consumption kg/km= |power/mass={{cvt|0.23|kW/kg}} |more performance= *'''Take-off run:''' {{cvt|18|-|30|m|0}} |avionics= }}

==See also== {{Aircontent| |related= *RWD 1 *RWD 2 *RWD 3 *RWD 4 |similar aircraft= |lists= |see also= }}

==References== {{commons category|RWD 7}} {{reflist}}   {{RWD aircraft}}

RWD 07 RWD 07 Category:Single-engined tractor aircraft Category:High-wing aircraft Category:Aircraft first flown in 1931