The RWD-18 was a four/five seat STOL

STOL

STOL is an acronym for short take-off and landing, a term used to describe aircraft with very short runway requirements.-Definitions:There is no one accepted definition of STOL and many different definitions have been used by different authorities and nations at various times and for a myriad of...

 (Short Take-Off and Landing) utility aircraft designed and built in Poland

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 from 1936.

Development

DWL studied a small twin-engined STOL utility aircraft as a private venture due to the lack of official support, hoping to kindle new markets in multi-engined, utility and business aircraft.
The RWD-18s safe handling characteristics and STOL capability were derived from the full span leading edge slats, which were operated by servo suction from a leading edge mounted venturi tube, and the fixed tri-cycle undercarriage. Construction was to have been mixed with wooden cantilever high wings having anhedral on the inner sections, fitted with full span powered leading edge slats and trailing edge flaps. The fuselage was a welded steel tube framework faired with wooden formers, covered with plywood and fabric, fitted out with a dual control cockpit and a bench seat in the cabin for two or three. At the rear of the fuselage a cantilever twin finned wooden tail unit was fitted to improve low-speed yaw control and stability. The spatted undercarriage legs were cantilevered from the engine nacelles and the fuselage under the nose with the main wheels fitted with 'Bendix' pneumatic brake units and the nosewheel steerable from the rudder bar. Any engine of around 150 hp could be fitted, but the prototype was fitted with 150hp Cirrus Major

Cirrus Major

-See also:*ADC Cirrus-Bibliography:** Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6....

 four-cylinder inverted in-line engines fitted in nacelles at the junctions of the inner and outer wings.
An RWD-9

RWD-9

The RWD 9 was a Polish sports plane of 1934, constructed by the RWD team.-Development:The aircraft was a further development of the RWD 6 - the winner of the IIIrd Challenge de Tourisme International Challenge 1932 international tourist aircraft contest...

 was converted to the RWD-20, by fitting a tri-cycle undercarriage, to speed the development of the RWD-18s, with extensive trials carried out including rough and ploughed field landings, take-offs and taxiing. Flight trials were scheduled to be carried out in December 1939 but the incomplete prototype was destroyed in an air raid during the German invasion of 1939.

Specifications (RWD-18 estimated)

See also

External links

• http://rwd-dwl.net/samoloty/rwd_18/index.htm
• http://en.wikipedia.org/wiki/RWD_(aircraft_manufacturer)
• http://rwd-dwl.net/pracownicy/duleba/index.htm