Bartini Stal-7

The Bartini Stal -7 ( also: Steel -7, Russian Сталь -7) was a Soviet airliner of the 1930s. In contrast to other types of stock with the " Stal " constructions, the load-bearing structure made ​​of stainless steel in place of the then usual aluminum.

History

The aircraft was designed by Robert Bartini, one emigrated to the Soviet Union Italian Communists, as a parallel draft of the Tupolev PS -35. This was preceded by 1935, a call for the creation of a modern transport aircraft for the Soviet civil air fleet. In the same year began in NII GWF the design work. The guy was designed as a cantilever mid-wing monoplane. The design consisted of steel alloys with a smooth aluminum skin. The wing received as a special feature a fold down, which should protect the cabin from floor contact during belly landings. The main wheels of the spur -wheel drive drove into the rear engine nacelles of the two M-100 engines. The Stal -7 should be able to carry eight passengers.

In 1937, flight testing, which was successfully completed. In the series Stal -7 did not anyway, as the PS -35 was probably rejected because of insufficient passenger capacity. The only copy came in the Aeroflot used. On August 28, 1939, flew with the crew N. P. Schebanow, W. A. Matveev and N. A. Baikusow with an average speed of 404.94 km / h on the 5058 -kilometer route Moscow - Sverdlovsk - Sevastopol - Moscow set a world record for this class of aircraft.

Vladimir Jermolajew, an employee Robert Bartinis, took over from the Stal -7 the gull wing and created by redesign of the fuselage and the tail unit, the built in about 300 copies long-range bomber Jermolajew Jer -2.

Specifications

• Civilian aircraft type
• Twin-Engined Plane