Avia B135

During the summer of 1939, ing. Novotný and his team initiated considerable re-design and refiment of the B.35, and a new prototype, the B-135, was completed late in the year. The fuselage of the B-135 was essentially similar to that of the B.35.3, the HS 12 Ycrs engine and armament of one 20 mm cannon and two 7,7 mm machine guns were retained, as was the hydraulically-recractable main undercarriage members of the B.35.3 prototype, but a controllable-pitchairscrew was introduced, the rudder was enlarged, and an entirely new wing of all-metal construction was fitted. The B-135 prototype was demonstrated to a Bulgarian mission in 1940, and the Bulgarian gouverment placed an order 12 production aircraft and also acquired a manufacturing licence for the fighter, although this never taken up. B-135 flown in Bulgaria as trainer to 1944 year