Technical data
Type PTA-1
Function Military observation
Year 1911
Crew 1
Engines 1*50hp Gnome
Length -
Wingspan 14.0/10.0m
Wing area 55m2
Empty weight 300kg
Loaded weight 500kg
Wing Load (kg/m2) 9.1
Power load (kg/hp) 10
Maximum Speed 80km/h

PTA-1, V.A.Lebedev

30k photo from "History of aircraft construction in the USSR", Vol.1 p.88

Modification of the Farman-IV, designed with easy assembly/disassembly in mind under Major Engineering Department requirements. Aircraft differed from Farman-IV by aerodynamic fairing, covering pilot's seat.

'Folding' aircraft was finished on January 26, 1911 and was demonstrated on St.Petersburg exposition. It performed not worser than the prototype. One of two built PTA-1 was equipped with inflatable pontoons under the lower wing for emergency landing on water surface.

Idea of a 'folding biplane' was far of practicality. Assembly (and adjustment of all those wires!) in field conditions required more than two hours. They were quite bulky for transportation too. At the same time monoplane was much smaller, and some 'folding monoplanes' could be assembled as fast as in 11 minutes.



References:
  • "History of aircraft construction in the USSR", Vol.1 p.87-88;

  • Modified September 24, 1997 Back to
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