Putilov Stal-3

Stal-3
Role	Transport
National origin	USSR
Designer	A.I. Putilov
First flight	1933
Number built	79
Developed from	Stal-2

The Stal-3 (Stal – steel) was a transport aircraft designed and built in the USSR from 1933.

Development

The Stal-3 was an enlarged development of the Stal-2, designed at OOS (Otdel Opytnogo Samolyetostroeniya - section for experimental aircraft construction), with a simplified structure which reduced manufacturing man-hours and structure weight, whilst increasing design load factor. The layout of the aircraft was very similar to the Stal-2, but featured bigger dimensions, slotted flaps, wide chord engine cowling, slotted ailerons, spatted wheels with brakes, or skis depending on season. Flight testing began in 1933 with acceptable results, leading to a production order for 79. The Stal-3 was an important aircraft with the GVF / Aeroflot till 1941, continuing to give service on utility duties with Aeroflot and the VVS.

Operators

 Mongolia

• Mongolian People's Aviation

 Soviet Union

• Aeroflot
• Soviet Air Force

Specifications (Stal-3)

Data from Gunston, Bill. "Encyclopaedia of Russian Aircraft 1875-1995". London:Osprey. 1995. ISBN 1-85532-405-9

General characteristics

• Crew: 1/2
• Capacity: 6/7
• Length: 10.68 m (35 ft 0-1/2 in)
• Wingspan: 17.02 m (55 ft 10 in)
• Wing area: 34.8 m² (364.6 ft²)
• Empty weight: 1,672 kg (3,686 lb)
• Gross weight: 2,817 kg (6,210 lb)
• Powerplant: 1 × M-22, 358 kW (480 hp)

Performance

• Range: 940 km (584 miles)
• Service ceiling: 5,340 m (17,250 ft)
• Rate of climb: 3.3333 m/s (656.2 ft/min)

See also

Aircraft of comparable role, configuration and era

• Ford-Stout 2AT
• Fokker F.VII
  

Related lists

• List of aircraft
  

References

• Gunston, Bill. “The Osprey Encyclopaedia of Russian Aircraft 1875 – 1995”. London, Osprey. 1995. ISBN 1-85532-405-9