PZL S-1

PZL S-1
Role Trainer and liaison aircraft
Manufacturer PZL-Mielec
First flight 15 November 1945
Retired 1946
Status prototype
Primary user Polish Air Force
Number built 1

The PZL S-1 was a Polish trainer and liaison aircraft of 1945, which remained a prototype. It was the second aircraft built in Poland after World War II.

Design and development

The aircraft was designed by engineer Eugeniusz Stankiewicz, being a teacher in the Aviation School in Zamość. Works started in late 1944, soon after the liberation of eastern Poland, when central and western parts were still occupied by the Germans. The design of a trainer and liaison plane was approved by the Polish military Aviation Command, and Stankiewicz completed documentation in an aircraft factory PZL-Mielec in Mielec (the factory was destroyed by the Germans and at that time existed as repair works only).

There, a prototype was built, utilizing parts of the Soviet Polikarpov Po-2, like an engine with a propeller, wheels and seats, also a construction of a fuselage was similar to the Po-2. The plane, named S-1 (for Stankiewicz), was very simple. It was flown on 15 November 1945, by the Soviet pilot Piotr Kondratyenko. It was the second Polish-designed plane, that flew after the war (the first was LWD Szpak). Further aircraft were not produced.

The prototype crashed on 14 May 1946 in Warsaw in a bad weather, however its pilot, who was Stankiewicz himself, survived.[1]

Description

Wooden construction braced high-wing (parasol wing) monoplane, conventional in layout. Fuselage built of a frame, plywood and canvas covered. Rectangular wing with rounded tips, two-spar. Crew of two, sitting in tandem, in open cockpits with windshields. Fixed conventional landing gear, with a rear skid. Radial engine M-11D in front, with a Townend ring, two-blade wooden propeller (2.4 m diameter). Fuel tanks 126 L.

Operators

 Poland

Specifications

Data from PZL S-X konstrukcje E. Stankiewicza oznaczone symbolem "S" : PZL S-1[2]

General characteristics

  • Crew: 2
  • Length: 8.5 m (27 ft 11 in)
  • Wingspan: 13 m (42 ft 8 in)
  • Height: 3.2 m (10 ft 6 in)
  • Wing area: 20 m2 (220 sq ft)
  • Empty weight: 700 kg (1,543 lb)
  • Gross weight: 950 kg (2,094 lb)
  • Powerplant: 1 × Shvetsov M-11D 5-cylinder air-cooled radial piston engine, 93 kW (125 hp)
  • Propellers: 2-bladed fixed-pitch propeller

Performance

  • Maximum speed: 180 km/h (110 mph, 97 kn)
  • Stall speed: 55 km/h (34 mph, 30 kn)
  • Range: 600 km (370 mi, 320 nmi)
  • Service ceiling: 3,800 m (12,500 ft)
  • Rate of climb: 3 m/s (590 ft/min)
  • Wing loading: 60 kg/m2 (12 lb/sq ft)

See also

Related development

References

  1. ^ Andrzej Morgala. Polskie samoloty wojskowe. 1945-1980
  2. ^ "PZL S-X konstrukcje E. Stankiewicza oznaczone symbolem "S":PZL S-1". Poser (in Polish). Warsaw. 16 May 2003. Archived from the original on 16 May 2003. Retrieved 20 May 2019.

Further reading

  • Babiejczuk, Janusz; Grzegorzewski, Jerzy (1973). Polski przemysł lotniczy 1945–1973 (in Polish). Warsaw.{{cite book}}: CS1 maint: location missing publisher (link)
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