title: Beneš-Mráz Be-50 Beta-Minor
text: # Beneš-Mráz Be-50 Beta-Minor
  
  The Beneš-Mráz Be-50 Beta-Minor was a light airplane manufactured in Czechoslovakia shortly before World War II.
  
  ## Design and development
  
  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
  
  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.
  
  In 2015, replica of Be-50 started operating. It crashed at airshow in August 2018, killing its pilot.
  
  ## Variants
  
  ### Be-50 Beta-Minor
  
      Tandem open cockpits and 12.66 m (41.5 ft) span wings.
  
  ### Be-51 Beta-Minor
  
      tandem seats in an enclosed cabin and 11.44 m (37.5 ft) span wings.
  
  ### Be-52 Beta-Major
  
      Strengthened and more powerful two-seat aerobatic trainer, with 10.66 m (35.0 ft) span wings.
  
  ### Be-56 Beta-Major
  
      Strengthened and more powerful single-seat aerobatic trainer, with 10.66 m (35.0 ft) span wings.
  
  ## Operators
  
  ### Independent State of Croatia
  
  * Air Force of the Independent State of Croatia
  
  ### Germany
  
  * Luftwaffe
  
  ### Slovakia
  
  * Slovak Air Force (1939–45)
  
  ## Specifications (Be-51 Beta-Minor)
  
  Data from
  
  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 $m^2$ (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
  
  Performance
  
  * Maximum speed: 205 km/h (127 mph, 111 kn) at sea level
  * Cruise speed: 180 km/h (110 mph, 97 kn)
  * Range: 800 km (500 mi, 430 nmi)
  * Service ceiling: 5,000 m (16,000 ft)
  * Time to altitude: 1,000 m (3,300 ft) in 6 minutes
  