On June 16, 1922 – 100 years ago today, Henry Berliner demonstrated a prototype helicopter to the U.S. Navy’s Bureau of Aeronautics in College Park, Maryland.
Background
Berliner was a native of Washington D.C. Emile Berliner, his father, was an inventor whose best-known invention was what is now known as a phonograph record. Henry Berliner was a technical genius in his own right and studied mechanical engineering at Cornell University for two years...