Flettner Fl 265

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Flettner Fl 265
Flettner Fl265 model.png
A model of the Fl 265
Role Experimental helicopter
Manufacturer Flettner
Designer Anton Flettner
First flight 1939
Primary user Luftwaffe
Number built 6

The Flettner Fl 265 was an experimental helicopter designed by Anton Flettner.

Design and development[edit]

This helicopter, developed in 1938 with the support of the German Navy, made it possible, for the first time, to transition from powered rotary-wing flight to autorotation and back again, making it the safest helicopter of its time. In contrast to the Fl 185, the Fl 265, believed to be the pioneering example of a synchropter, had two intermeshing rotors 12 m in diameter, powered by a 160 horsepower (120 kW) BMW-Bramo Sh 14 A radial engine in the nose of the fuselage, fitted with a fan to assist cooling. Six helicopters were constructed, but series production was curtailed in favour of the Flettner Fl 282.

Operators[edit]

 Germany

Specifications (Fl 265)[edit]

Data from [1]

General characteristics

  • Crew: 1
  • Length: 6.16 m (20 ft 3 in)
  • Height: 2.82 m (9 ft 3 in)
  • Empty weight: 800 kg (1,764 lb)
  • Max takeoff weight: 1,000 kg (2,205 lb)
  • Powerplant: 1 × Bramo Sh.14A 7-cyl. fan-assisted air-cooled radial piston engine, 119 kW (160 hp)
  • Main rotor diameter: 2× 12.3 m (40 ft 4 in)
  • Main rotor area: 237.6 m2 (2,558 sq ft) total area

Performance

  • Maximum speed: 140 km/h (87 mph; 76 kn) at sea level
  • Range: 300 km (186 mi; 162 nmi)
  • Service ceiling: 4,100 m (13,451 ft)

See also[edit]

Notes[edit]

  1. ^ Green, William (2010). Aircraft of the Third Reich. Vol.1 (1st ed.). London: Aerospace Publishing Limited. pp. 328 – 329. ISBN 978 1 900732 06 2. 

References[edit]

  • (German) Nowarra, Heinz J.: Die Deutsche Luftrüstung 1933-1945, Bernard & Graeffe Verlag, Koblenz 1993, ISBN 3-7637-5464-4
  • Green, William (2010). Aircraft of the Third Reich. Vol.1 (1st ed.). London: Aerospace Publishing Limited. pp. 328 – 329. ISBN 978 1 900732 06 2. 

External links[edit]


This article incorporates information from the revision as of 2008-02-08 of the equivalent article on the German Wikipedia.