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PWS-1
The PWS-1 was a Polish two-seat fighter and reconnaissance aircraft, constructed by Podlaska Wytwórnia Samolotów (PWS) in 1927, which remained a prototype.
==Design and development==
The PWS-1 was the first design of the Podlaska Wytwórnia Samolotów (Podlasie Aircraft Factory), and the second aircraft designed and built in Poland, after the CWL WZ-X. It was conceived as a single-engine high-wing two-seat fighter, a main purpose of which was the escorting of bombers. Design work was carried in 1926 by Zbysław Ciołkosz and Aleksander Grzędzielski, under direction of Stanisław Cywiński.
After static tests, the prototype first flew on 25 April 1927 in Biała Podlaska. Tests revealed poor manoeuvrability, its speed was also low due to a thick wing, despite STOL capability.
In 1928 the aircraft was reworked, receiving a new, lighter, straight wing of thinner profile and duralumin construction instead of a wooden, slightly swept one. It also received an enormous vertical stabilizer of rectangular shape with rounded top. After modifications it was flown in early 1929, under a designation PWS-1bis. Its performance improved, but because of its relatively low speed compared to other fighters, its primary role was changed to reconnaissance. Development was however discontinued, because it had little payload, and in a meantime Poland had bought large numbers of better Breguet 19 and Potez 25 reconnaissance and bomber aircraft.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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