The airplane was developed as the peak of Jaroslav Lonek’s construction skills in 1937. It could be used both for sporting competitions and as a quick courier aeroplane for transporting top managers from Bata’s Concerns. Even during test-flights, this aircraft had surprised with its high performance and modern look. However, it needed a good airport with long runways. And on account of its landing speed, 140 km per hour, (very high at that time) and of its high carrying capacity the aircraft could only be flown by skilled pilots.

Unfortunately, it was not allowed to take part in the last possible speed competition ahead of the outbreak of WWII. The great pilot Ján Ambrus arrived at the starting point late (not his own fault) and the French organizers from Circuit de l’Est were uncompromising. Due to the occupation of Czechoslovakia by National-Socialistic Germany, there was never any possibility for the assembly line production of the plane.

Technical data

Engine:  Walter Major 4
Power:  135 HP
Wingspan:  7 m
Length:  6,8 m
Empty weight:  460 kg
Take-off weight:  650 kg
Maximum speed:  350 kph
Service ceiling:  5 600 m
Range:  700 km


February 2009