Austrian Airlines Flight 901 Austrian Airlines Flight 901 Austrian Airlines Flight 901 was a flight from Vienna, Austria to Moscow, USSR (now Russia) via Warsaw, Poland. On the night of 26 September 1960 the aircraft operating the flight, a Vickers Viscount, crashed near Moscow while on its approach to land, killing 31 of the 37 passengers and crew on board. The aircraft was a Vickers Viscount 837 four-engined turboprop airliner registered "OE-LAF". The aircraft had first flown on 10 February 1960 and had been delivered new to Austrian Airlines about two weeks later, seven months before the crash. The aircraft departed Warsaw with six
Turboprop jet cruising speeds for most missions. The Bear would serve as their most successful long-range combat and surveillance aircraft and symbol of Soviet power projection throughout the end of the 20th century. The USA would incorporate contra-rotating turboprop engines, such as the ill-fated twin-turbine Allison T40 — essentially a twinned up pair of Allison T38 turboprop engines driving contra-rotating propellers — into a series of experimental aircraft during the 1950s, with aircraft powered with the T40, like the Convair R3Y Tradewind flying boat never entering U.S. Navy service. The first American turboprop engine was the General Electric XT31, first used