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Avia B 34

 

avia-b34


The B 34, designed by Ing Frantisek Novotny, owed nothing to previous Avia single-seat fighters, and was an all-metal fabric-covered single-bay biplane powered by a 740hp Hispano-Suiza 12Nbr 12-cylinder liquid-cooled engine. Flown for the first time in 1932 by Vaclav Koci, the B 34 initially proved disappointing and the prototype was promptly returned to the factory for modifications, re-emerging as the B 34/1 with a new propeller, a redesigned engine cowling in which the face of the underslung radiator bath was cut back, and redesigned vertical tail surfaces. With these changes flight testing was resumed, and a production batch of 12 B 34 fighters was ordered for the Czechoslovak air arm.

 

Avia-B34-02
First prototype B-34 - Ing František Novotny and test pilot Cpt Vladimir Cerny

 

The production B 34 embodied further redesign of the vertical tail surfaces, which were enlarged, and other changes by comparison with the prototype, including narrower-chord interplane bracing struts and the discarding of the streamlined mainwheel fairings. Power was provided by an Avia (Skoda) Vr 30 (licence-built HS 12Nbr) rated at 760hp for take-off, and armament comprised two 7.7mm fuselage-mounted Mk 28 machine guns.

 

B-34 Prototype
Engine: 1 x 650hp Avia Vr 36
Wingspan: 9.40 m / 31 ft 10 in
Length: 7.25 m / 24 ft 9 in
Max. speed: 315 km/h / 196 mph
Rate of climb: 12 m/s
Range: 600 km / 373 miles
Armament: 2 x 7.7mm
Crew: 1

 

B-34
Engine: 1 x 760hp Skoda Vr 30
Wingspan: 9.40 m / 31 ft 10 in
Length: 7.25 m / 24 ft 9 in
Height: 3.10 m / 10 ft 2 in
Wing area: 23.90 sq.m / 257.26 sq ft
Max take-off weight: 1730 kg / 3814 lb
Empty weight: 1305 kg / 2877 lb
Max. speed: 315 km/h / 196 mph
Cruise speed: 298 km/h / 185 mph
Ceiling: 8200 m / 26900 ft
Rate of climb: 610 m/min / 2000 ft/min
Range: 600 km / 373 miles
Armament: 2 x 7.7mm
Crew: 1

 

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