willedoo Posted October 11, 2012 Posted October 11, 2012 A very smokey attempted engine start on a Mi-1 helicopter undergoing restoration. The engine is a 575 HP seven cylinder radial Ivchenko Al-26 (M-26). It has an interesting lineage going back to the Wright Cyclone 9, license built in the Soviet Union as the Shvetsov M-25. This engine was improved as the Shvetsov ASh-62 (M-62), in the same 9 cylinder configuration and later developed into the 14 cylinder twin row ASh-82 (M-82). The M-82 powered many different aircraft, including the famous Lavochkin La-5 and La-7. The Al-26 is one, 7 cylinder row of the M-82 adapted to helicopter use. It was still being built in the 1960's in Poland as the PZL-3S. Apparently one Air Tractor was built with this engine as the AT-401A. [ATTACH=full]1394[/ATTACH] Cheers, Willie.
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