Avia B-534-IV, Czechoslovak users, part two.

The Avia B-534-IV demonstrated an excellent performance at a flying exhibition in Switzerland in 1937. The German Bf.109 won the categories of best climbing and diving and the German competitor pilot, handling a Henschel Hs.123 pushed his biplane to claim the second post, so the Avia B-534-IV got the next three places. It did even manage to outflight other fighters taking part, including the Bf.109 even if it was 11 Km/h slower than this one.

As Czechoslovakia was occupied in March 1939, this airplane couldn't be used in combat by it's native nation. By that date, high performance monoplane fighters such like the German Bf.109, the British Hawker Hurricane or Supermarine Spitfire or the American Curtiss P-36 were raising the bar for fighter/interceptor standards and biplanes were started to be obsolete.

Sources:
1. https://en.wikipedia.org/wiki/Avia_B-534
2. Salamander Books - The Complete Book of Fighters