Gunkorsky Posted November 5, 2002 Report Share Posted November 5, 2002 When first publicly unveiled in January 1954, the Sikorsky S-56 was introduced by its manufacturer as a "giant, twin-engine transport", that represents a "tremendous advance in the art of designing and building helicopters". In fact, the S-56 was the biggest, fastest and most powerful production helicopter in the free world until the introduction of Boeing Vertol's turbine-driven Chinook in 1961. I’d appreciate any information on this terrific helicopter! Quote Link to comment Share on other sites More sharing options...
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