First flight of Vertol 107-II prototype
Tuesday, October 25, 1960
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Description
Source: "The American Helicopter: An Overview of Helicopter Developments in America 1908-1999", Hirschberg, Michael, Published in July 2000, Page 50.
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Description
Source: "The American Helicopter: An Overview of Helicopter Developments in America 1908-1999", Hirschberg, Michael, Published in July 2000, Page 50.
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