Stal

Stal means steel in many Slavic languages. Stål is a name of Swedish origin.

It may refer to:

Putilov Stal-3

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 the OOS (Otdel Opytnogo Samolyetostroeniya - section for experimental aircraft construction), with a simplified structure which reduced manufacturing man-hours and structural weight, whilst increasing the design load factor. The layout of the aircraft was very similar to the Stal-2, but featured larger dimensions, slotted flaps, a wide chord engine cowling, slotted ailerons, and 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 until 1941, continuing to give service on utility duties with Aeroflot and the Soviet Air Force.

Operators

Specifications (Stal-3)

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

Putilov Stal-2

The Stal-2 was a Russian mid-range passenger aircraft.

Development and design

The Stal-2 was designed by the OOS (Otdel Opytnogo Samolyetostroeniya - section for experimental aircraft construction), the part of the NII GVF (Nauchno-issledovatel'sky Institut Grazdahnskovo Vozdushnogo Flota - civil air fleet scientific research institute), and built at Tushino GAZ-81 (Gosudarstvenny Aviatsionnyy Zavod – Tushino state aviation factory). It was a high-wing braced monoplane with an enclosed cockpit and passenger cabin, constructed of Enerzh-6 stainless steel. Trial flights began in 1931, but due to the experimental technology being used in its design and construction, production did not begin until 1934. 111 were produced before being replaced in 1935 on the production line by the Stal-3. The prototype was powered by an imported Wright J-6, early production aircraft used Bessonov M-26 engines with the bulk of production using Nazarov MG-31 engines.
In 1934 the plane was shown at the 14th Paris Air Show.