PWS-6: Difference between revisions

{|{{Infobox Aircraftaircraft Beginbegin

|image =File:Pws6.jpg

}}{{Infobox Aircraftaircraft Typetype

|first flight = [[1930 in aviation|1930]]

|}

The '''PWS-6''', was a [[Poland|Polish]] [[liaison aircraft]], developed in 1930 by the [[PWS (aircraft manufacturer)|PWS]] (''Podlaska Wytwórnia Samolotów'' – [[Podlasie]] Aircraft Factory), that remained a prototype.

The PWS-6 was a successor of an earlier liaison aircraft design, the [[PWS-5]], which was not accepted for mass production. The designers, Aleksander Grzędzielewski and Augustyn Bobek-Zdaniewski, utilized the experience they had gained on [[PWS-11]] and [[PWS-12]] trainers, and as a result the new plane had improved aerodynamics, an oval shaped fuselage section and rounded wingtips. The layout of wings and their bracing were similar to the PWS-5, as was the engine and fixed [[Landing gear|undercarriage]], while the front of the fuselage and the [[empennage]] was similar to a final variant of the PWS-12. It was the first Polish aircraft fitted with [[Leading edge slats|slats]].<ref name=glass>Glass (1977), pp. 182–183.</ref>

The design was produced in 1929–1930 and a scale-model of the aircraft was tested in the wind-tunnel. The prototype was built on the factory's own initiative and first flew in late 1930 in [[Biała Podlaska]], piloted (pilotby Franciszek Rutkowski). In 1931 it was tested in the Aviation Technical Research Institute (ITBL) in Warsaw. It was evaluated as much better than the PWS-5, with better performance, good handling and a short landing. However, the aircraft was not produced, because the Polish Air Force had just ordered a production of the [[Lublin R-XIII]] aircraft.<ref name=glass/>

The two-man crew sat in [[tandem]] in open cockpits. The rear observer's cockpit could be fitted with a ring machine gun mounting in case of serial production. The plane had a fixed, split axle [[conventional landing gear]], with a rear skid. The fuel tank was located in the fuselage, in front of the cab. It had a maximum capacity of 210 lL, but the normal capacity was 190 lL.<ref name=glass/>

The engine was a 9 -cylinder [[Wright R-790|Skoda-Wright Whirlwind J-5]] air-cooled [[radial engine]], built under licence in the Polish Skoda Works. Its nominal power was 220 &nbsp;hp, the take-off power was 240 &nbsp;hp. The engine had a [[Townend ring]]. The propeller was a wooden Szomański two-blade with a fixed pitch, although later a metal Ratier propeller with an adjustable-pitch was also tried.<ref name=cynk>Cynk (1971).</ref> Cruise fuel consumption was 45–50 lL/h.<ref name=glass/>

|length mainnote= 6.98 m

|lengthspan altm=229.9 ft6

|span mainnote=9.6 m

|height mainnote=2.95 m

|wing area mainnote=25.00 m²

|airfoil=Bobek-Zdaniewski No.7

|empty weight mainkg= 800 kg

|empty weight altnote= 1,800 lb

|loadedgross weight mainkg= 1175 kg

|loadedgross weight altnote=2,590 lb

|usefulmax loadtakeoff main= 375weight kg=

*{{cite book |last= Cynk|first=Jerzy Jerzy|authorlinktitle= |coauthors= |title=Polish Aircraft 1893–1939|year= 1971|publisher= Putnam & Company|location= London|isbn= 978-0-370-00085-5|languageurl-access=English registration|isbnurl=9780370000855 https://archive.org/details/polishaircraft1800cynk}}

*{{cite book |last= Glass|first=Andrzej |authorlink= |coauthors= |title=Polskie konstrukcje lotnicze 1893–1939 [Polish aviation designs 1893–1939]|year= 1977|publisher= WKiŁ|location= Warsaw |issn=|pages=182–183|language=Polish|isbn=pl|oclc=213774512}}