Beneš-Mráz Be-50 Beta-Minor

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Be-50 Beta-Minor
B-50 Beta Minor (OK-EAA).jpg
Be-50 Beta-Minor
Role Sports plane
Manufacturer Beneš-Mráz
Designer Pavel Beneš and Jaroslav Mráz
First flight 1935

The Beneš-Mráz Be-50 Beta-Minor was a light airplane manufactured in Czechoslovakia shortly before World War II.

Design and development[edit]

First flown in 1935, it was a low-wing cantilever monoplane of wooden construction, with tandem open cockpits and fixed tailwheel undercarriage. The aircraft proved popular with Czechoslovakia's aeroclubs and was successful in international competitions. In 1937, the designers created a modernised version, the Be-51, which featured a reduced wingspan and fully enclosed cockpits. A final variant, the Be-52 Beta-Major retained the Be-50's open cockpits but featured improved aerodynamics and a more powerful Walter Major engine.

Operational history[edit]

Like other Czechoslovakian aircraft, all available machines were impressed into Air Force service at the outbreak of war. Several Be-51s survived to be used by the Luftwaffe as liaison aircraft and trainers during the occupation.[1]


Be-50 Beta-Minor
Be-51 Beta-Minor
Be-52 Beta-Major


 Independent State of Croatia

Specifications (Be-51 Beta-Minor)[edit]

Data from [2]

General characteristics

  • Crew: 2
  • Length: 7.76 m (25 ft 6 in)
  • Wingspan: 11.44 m (37 ft 6 in)
  • Height: 2.05 m (6 ft 9 in)
  • Wing area: 15.3 m2 (165 sq ft)
  • Empty weight: 480 kg (1,058 lb)
  • Max takeoff weight: 760 kg (1,676 lb)
  • Powerplant: 1 × Walter Minor 4-cyl. inverted air-cooled in-line piston engine, 71 kW (95 hp) for take-off
  • Propellers: 2-bladed fixed pitch propeller


  • Maximum speed: 205 km/h (127 mph; 111 kn) at sea level
  • Cruise speed: 180 km/h (112 mph; 97 kn)
  • Range: 800 km (497 mi; 432 nmi)
  • Service ceiling: 5,000 m (16,000 ft)
  • Time to altitude: 1,000 m (3,300 ft) in 6 minutes


  1. ^ Ketley, Barry, and Rolfe, Mark. Luftwaffe Fledglings 1935–1945: Luftwaffe Training Units and their Aircraft (Aldershot, GB: Hikoki Publications, 1996), p.11.
  2. ^ Green, William (2010). Aircraft of the Third Reich (1st ed.). London: Aerospace Publishing Limited. p. 105. ISBN 978 1 900732 06 2. 


  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 152. 
  • World Aircraft Information Files. London: Bright Star Publishing. pp. File 890 Sheet 25. 
  • Němeček, V. (1968). Československá letadla. Praha: Naše Vojsko.
  • Green, William (2010). Aircraft of the Third Reich (1st ed.). London: Aerospace Publishing Limited. p. 105. ISBN 978 1 900732 06 2.