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Penkala 1910 Biplane / Leptir
Cvjetkovic CA-10 Penkala
Slavoljub Penkala was interested in flight and decided to buld his own airplane, pretty much making it up as he went along. He patented it in late 1909 and the plane was ready for its first flight by June 1910. The funding came from Penkala’s own income from his pen and pencil factory, and a lot of the work and ideas also came from Dragutin Novak, who joined Penkala earlier the same year.
The Leptir (English: Butterfly)was a single engine, sesquiplane aircraft with conventional landing gear. The open girder fuselage provides an unusually long distance to the tail surfaces, compared to modern aircraft. The flat bottom surface of the fuselage was covered, forming a long thin triangular surface intended to provide lift, which was not functional in level flight. The aircraft was tail heavy with a center of gravity at 70 percent of wing chord.
The first flight occurred on 22 June 1910 with pilot Dragutin Novak. The 1910 Leptir II featured modifications to include skids. The aircraft was crashed several months later.
The CA-10 replica was built in 2010 and known as the Cvjetkovic CA-10 Penkala, bearing the registration of 9A-XCA. It was powered by an 80 hp (60 kW) Rotax 912 with the center of gravity moved forward for safety.
Cvjetkovic CA-10 Penkala
Penkala Biplane
Propeller: 2-blade
Wingspan: 11 m (36 ft 1 in)
Length: 11 m (36 ft 1 in)
Empty weight: 330 kg (728 lb)
Crew: 1

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