IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. In 1953, Hiller Helicopters developed ...
Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. In 1944, at the age of 19, Stanley Hiller, Jr. designed, built, and test flew the first helicopter with coaxial rotors ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results