RWD-9

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RWD-9
Walter Bora a RWD-9 (1934) .jpg
RWD-9 with Walter Bora engine
Type: Sports and touring aircraft
Design country:

Poland 1919Second Polish Republic Poland

Manufacturer:

RWD

First flight:

4th December 1933

Commissioning:

1934

Number of pieces:

8th

The Polish RWD-9 is a light civil aircraft of the 1930s. The abbreviation RWD stands for the design team Rogalski, Wigura and Drzewiecki.

development

Jerzy Drzewiecki planning the RWD-9
With folded-up wings on a European tour of 1934

The RWD-9 was designed in 1933 for participation in the European tour of 1934 and as a successor to the RWD-6 , which won 1st place at the event last year . However, it turned out that the construction of the wing was too weak, which is why one of the three built examples had an accident during the first test flights due to a broken wing. Almost a month after the competition, on September 11, 1932, a second RWD-6 crashed on the way from Warsaw to Prague, also after breaking the wing, tragically killing the victorious pilot Franciszek Ż Wirko and the member of the RWD construction group Stanisław Wigura came. The construction of the RWD-9, which was co-financed by the event organizers and a memorial committee for the two aircraft involved in the accident, therefore concentrated on strengthening the structure, which was also equipped with slats , slotted flaps and spoilers in accordance with the competition requirements to improve the short take-off properties . In order to achieve a high score in the technical assessment, the wing was designed to be foldable on the side of the fuselage. In addition to these aspects, the RWD-9 differed from its predecessor mainly in the increase in the number of seats from two to four. Originally the new Škoda GR-760 from Czech production was to be used as the drive ; However, since there were delays in its development, the prototype was initially equipped with a B-6S Buccaneer with 198 kW (269 hp) and the Škoda engine was retrofitted later. In addition, an airframe was made for static tests . The flight tests began on December 4, 1933 and was successfully completed. A total of eight copies were made of the RWD-9, equipped in equal parts with either the GR-760 or the also Czech Walter Bora with 162 kW (220 PS) and, depending on their engine, as RWD-9S (for Škoda) or RWD-9W (for Walter ) were designated.

Participation in the European tour was a great success for the RWD-9. Four out of six participating pilots came in the final ranking with their aircraft among the top ten; Jerzy Bajan and Stanisław Płonczyński took first and second place respectively. The RWD-9 was also victorious in the technical competition and took first to third place.

At the end of 1938, the prototype of the RWD-9 was equipped with a rigid nose wheel landing gear for test purposes and tested with an in-line engine Walter Major (97 kW (132 PS)) under the designation RWD-20 .

Military users

Spain Second RepublicSecond Spanish Republic Spain
Spanish Republican Air Force
Spain 1938Spain Spain
Spanish Air Force - after the Civil War

Technical specifications

Three-sided view
Parameter Data
crew 2
Passengers 2
length 7.60 m
span 11.64 m
height 2.03 m
Wing area 16.00 m²
Wing extension 8.5
payload 370 kg
Empty mass 560 kg
Max. Takeoff mass 790 kg
Cruising speed 255 km / h
Top speed 281 km / h near the ground
Service ceiling 7000 m
Range 800 km
Engines an air-cooled radial engine Škoda GR-760 with 213 kW (290 PS)

literature

  • Václav Němeček: Airplanes . Civil aircraft from the years 1903–1957. Dausien, Hanau 1991, ISBN 3-7684-0125-1 , p. 154/155 .
  • Peter All-Fernandez (ed.): Aircraft from A to Z . Aamsa Quail-Consolidated P2Y. tape I . Bernard & Graefe, Koblenz 1987, ISBN 3-7637-5904-2 , p. 255/256 .

Web links

Commons : RWD-9  - collection of images, videos and audio files