Putilov Stal-5

Stal-5
Role	Transport
National origin	USSR
Designer	A.I. Putilov
First flight	late 1935 (1/4scale model)

The Stal-5 (Stal – steel) was a transport aircraft designed in the USSR from 1933.

Development

In 1933 Putilov started the design of a flying wing 18 passenger transport with the intention of achieving very high levels of efficiency. The broad rectangular centre-section housed the cabin and a fully glazed cockpit on the centre-line, with long and shallow fins at its extremities and a large elevator at the trailing edge. The tapered outer wings carried the slotted flaps and ailerons. The structure was to be entirely formed from Enerzh-6 stainless steel tubing and rolled sections covered with Bakelite impregnated ply (similar to Delta-wood) on the centre-section and fabric elsewhere. Structural test specimens were tested, including a complete wing spar, and a 1/4scale model powered by two 45hp Salmson engines was built and flown by V.V. Karpov and Ya.G. Paul in 1935. The results of the scale model test flights were not encouraging, displaying poor handling and stability, after adjustments failed to yield better results further work was abandoned.

Variants

• KhB - (Khimichyevskii Boyevik – chemical fighter) A Chemical warfare variant was planned but was abandoned along with the Stal-5.

Specifications (Stal-5)

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

General characteristics

• Crew: 2
• Capacity: 18
• Length: 12.5 m (41 ft in)
• Wingspan: 23.0 m (75 ft 5-1/2 in)
• Wing area: 120 m² (1,292 ft²)
• Empty weight: 1,672 kg (3,686 lb)
• Gross weight: 8,000 kg (17,640 lb)
• Powerplant: 2 × M-34F, 611.4 kW (820 hp) each

Performance

See also

Aircraft of comparable role, configuration and era

• Burnelli UB-14
• Kalinin K-12
  

Related lists

• List of aircraft
  

References

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

External links

• http://www.ussr-airspace.com/index.php?main_page=product_info&cPath=28_39_38_105&products_id=1031