Sikorsky S-69/XH-59 ABC
The S-69/XH-59 was a series of experimental aircraft to test and develop the Advancing Blade Concept (ABC)
Type Description
The S-69/XH-59 was a series of experimental aircraft to test and develop the Advancing Blade Concept (ABC)
Milestones Associated with the Sikorsky S-69/XH-59 ABC
July 26, 1973
S-69/XH-59A ABC (initial configuration):
First flight of the Sikorksy S-69/XH-59A ABC demonstrator
July 21, 1975
S-69/XH-59A ABC (initial configuration):
First flight of the second Sikorsky S-69/XH-59A ABC demonstrator
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