The Beneš-Mráz Be-150 Beta-Junior was a light aerobatic trainer and racing aircraft, designed and built in Czechoslovakia in the late 1930s.
Design and development.
With the success of the Beneš-Mráz Be-50 Beta-Minor Beneš decided to produce a smaller version with better performance for sport flying. A major incentive was the availability of five spare Walter Junior engines, which would imbue the Be-150 with much improved vertical performance compared to the Be-50.
Beneš shortened the fuselage and fitted the short-span wings of the Be-52, retaining the open cockpits and fixed, trousered, tailwheel undercarriage of the Be-50.
Operational history.
The Be-150 was first flown on 5 January 1937, but was rejected by the MNO (Czechoslovak Ministry of Defense) and the three production aircraft were used for general flying club use and for air racing.
Specifications (Be-150).
"Data from" General characteristics* Crew: 2* Aspect ratio: * Propellers: -bladed
Performance* Maximum speed: Mach * Endurance: * g limits: * Roll rate: * Maximum glide ratio: 
Armament
References.
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