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Avia B.158

The Avia B.158, a prototype Czechoslovak twin-engined light bomber aircraft from the 1930s, saw only one unit constructed before being abandoned due to the German occupation of Czechoslovakia in March 1939.

Developed by Avia in 1935, the B.58 design featured a small twin-engined bomber with a fixed undercarriage, utilizing two 313 kW (420 hp) Avia Rk.17 radial engines.

In 1936, this particular design was discarded and substituted with a more sophisticated and potent variant known as the Avia B.158.

The Avia B.158 was specifically crafted to fulfill the demands set forth by the Czechoslovak Ministry of National Defence (MNO) for a high-performance medium bomber that could operate effectively both day and night.

This new design was intended to rival Aero Vodochody’s A.300.

Avia commenced the construction of a sole prototype of the B.158 in 1937.

This aircraft was a three-seat low-wing monoplane featuring inverted gull-wings, a retractable tail wheel undercarriage, and 634 kW (850 hp) Avia (Hispano-Suiza) 12Ydrs engines.

The maiden flight of the B-158 took place in the middle of 1938.

Additionally, a twin tail was installed on the aircraft to enhance the field of fire for the dorsal gun position.

Although the Aero A.300 showed better performance, production had not begun by the time Germany conquered Czechoslovakia.

The prototype B-158 was scrapped in 1940 after testing by the Luftwaffe at Rechlin.





12.00 m (39 ft 4 in)


16.00 m (52 ft 6 in)


5.20 m (17 ft 1 in) 

Wing area

43.00 m2 (462.8 sq ft)

Empty weight

4,300 kg (9,480 lb)

Gross weight

6,600 kg (14,551 lb)

Max take-off weight

7,260 kg (16,006 lb)


2 × Avia (Hispano-Suiza) 12Ydrs liquid-cooled V12 engine,

630 kW (850 hp) each


Maximum speed

435 km/h (270 mph, 235 kn)

Cruise speed

365 km/h (227 mph, 197 kn)


1,100 km (680 mi, 590 nmi)

Service ceiling

8,500 m (27,900 ft)

Rate of climb

7.00 m/s (1,378 ft/min)



3×7.92 mm vz.30 machine guns in nose, dorsal and ventral positions


1,000 kg (2,200 lb).


Czechoslovakian Air Force, 1918-1970, Aircam Aviation Special 05-Richard Ward, Zdenek Titz & Gordon C. Davies.

AVIA B-35 & B-135-MBI- M Bily, D Bernad & C Kucera.

Kbely Aviation Museum,


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