The P.W.S.8 was a 1930

Polish Polish may refer to: * Anything from or related to Poland, a country in Europe * Polish language * Poles Poles,, ; singular masculine: ''Polak'', singular feminine: ''Polka'' or Polish people, are a West Slavic nation and ethnic group, w ...

sports plane, constructed by the '' Podlaska Wytwórnia Samolotów'' (PWS), that remained a prototype.

Design and development

The plane was designed in 1929 by Jarosław Naleszkiewicz in ''Podlaska Wytwórnia Samolotów'', on factory's initiative, to participate in the

Challenge 1930 The International Touring Competition in 1930 (french: Challenge International de Tourisme) was the second Fédération Aéronautique Internationale, FAI international touring aircraft contest, that took place between July 18 and August 8, 1930 in B ...

international touring aircraft contest (with P.W.S.50, P.W.S.51 and P.W.S.52). It was a wooden biplane, partly modelled after

de Havilland Gipsy Moth The de Havilland DH.60 Moth is a 1920s British two-seat touring and training aircraft that was developed into a series of aircraft by the de Havilland Aircraft Company. Development The DH.60 was developed from the larger DH.51 biplane. ...

.Glass, A. (1977), p.184-185 Its unique feature, taken from earlier PWS military aircraft, like P.W.S.5, were N-shaped struts between lower and upper wing and additional oblique transverse struts, stiffening the design, instead of wire braces (similar bracing to

Handley Page Gugnunc The Handley Page H.P.39 is a wooden biplane that was constructed in 1929. The aircraft was intended to compete in a competition proposed by the Daniel Guggenheim Fund for the Promotion of Aeronautics - the Guggenheim Safe Aircraft Competition ...

). The plane was first flown in 1929 or 1930 by F. Rutkowski, with

Armstrong Siddeley Genet The Armstrong Siddeley Genet was a five-cylinder, air-cooled, radial engine for aircraft use built in the UK, first run in 1926. It developed 80 hp at 2,200 rpm in its final form and was a popular light aircraft powerplant. Followin ...

80 hp radial engine. In spring of 1930 it was modified, with Walter Vega 85 hp radial engine, also a tailfin shape and some other details were changed. It was however too heavy for engines used (65 kg heavier, than designed). The plane was a counterpart of

PZL.5 The PZL-5 was a Polish two-seat touring and sports aircraft of 1930 constructed and produced by the PZL. Design and development The aircraft was designed in 1929 by an amateur designer Władysław Kozłowski. It was a wooden biplane, similar t ...

for a sportsplane and trainer, but was worse, and as a result, remained a prototype. Its major fault was low speed, especially in a view of competition purpose.

Operational history

The prototype, with markings SP-ADA, took part in the

international contest in July 1930, flown by Piotr Dudziński. He was disqualified for time infringement during a rally over Europe, but completed the rally off the contest.* Krzyżan, Marian. ''Międzynarodowe turnieje lotnicze 1929-1934'' nternational aviation competitions 1929-1934 Warsaw 1988, Later the plane was used for a short time by an Aviation Club of the PWS factory. Possibly it was broken up by 1931, because there is information about its engine being used in the repaired P.W.S.51.Glass, A. (1977), p.187

Description

The P.W.S.8 was a wooden construction braced biplane. A fuselage was rectangular in cross-section, with plywood skin, except for an engine section, which was duralumin sheet covered. The wings were rectangular three-section, two-spar, with rounded tips, canvas covered (plywood covered on a leading edge). The

ailerons An aileron (French for "little wing" or "fin") is a hinged flight control surface usually forming part of the trailing edge of each wing of a fixed-wing aircraft. Ailerons are used in pairs to control the aircraft in roll (or movement around ...

were on a lower wing, which had a smaller span of 9 m. The wings were folding rearwards (width with folded wings was 2.95 m). Crew of two, sitting in

tandem Tandem, or in tandem, is an arrangement in which a team of machines, animals or people are lined up one behind another, all facing in the same direction. The original use of the term in English was in ''tandem harness'', which is used for two ...

in open cockpits with windshields. Cockpits with dual controls (a front cockpit had removable steering stick). The third cab could be set up in a baggage compartment behind. The plane had 5-cylinder air-cooled radial engine Walter Vega in front, developing 85 hp nominal power and 90 hp take-off power. Two-blade wooden propeller Heine of a fixed pitch. Conventional fixed

landing gear Landing gear is the undercarriage of an aircraft or spacecraft that is used for takeoff or landing. For aircraft it is generally needed for both. It was also formerly called ''alighting gear'' by some manufacturers, such as the Glenn L. Martin ...

, with a rear skid. Fuel tank 125 L in upper central wing section (additional 60 L tank could be mounted in the fuselage front). Fuel consumption - 22 L/hour.

Specifications (P.W.S.8)

References

External links