Igor Sikorsky Flies the First Practical Helicopter
A single main rotor and a tail rotor solve vertical flight, and every helicopter since copies the layout
Quick facts
- First tethered flight
- September 14, 1939
- First free flight
- May 13, 1940
- Location
- Stratford, Connecticut
- Successor aircraft
- VS-316/R-4, first mass-produced helicopter (1941 contract)
What happened
On September 14, 1939, engineer Igor Sikorsky piloted his VS-300 on its first tethered flight at the Vought-Sikorsky plant in Stratford, Connecticut, hovering for about 10 seconds while under cable restraint. Sikorsky continued refining the design over the following months, and on May 13, 1940, he flew the VS-300 free of its tether for the first time. The aircraft used a single main lifting rotor with a separate vertical tail rotor to counteract torque, a configuration that solved the control problems that had defeated earlier helicopter experiments.
Why it matters
The VS-300's single main rotor and tail rotor layout became the standard configuration used by the overwhelming majority of helicopters built afterward, including the VS-316, later designated the R-4, which became the world's first mass-produced helicopter following a 1941 U.S. Army Air Corps contract. Sikorsky's design work effectively founded the helicopter industry as a distinct branch of aviation, separate from fixed-wing aircraft, within a single research program.
How we know
The VS-300's flight dates, configuration, and design lineage are documented by the Igor I. Sikorsky Historical Archives and by the American Society of Mechanical Engineers, which designated the VS-300 a National Historic Engineering Landmark in 1984.
Sources
- Igor I. Sikorsky Historical Archives. VS-300: The First Practical Helicopter · Primary source (author-declared)sikorskyarchives.com · Cited as a "primary" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
- American Society of Mechanical Engineers. Sikorsky VS-300 Helicopter · General sourceasme.org · Cited as a "reference" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
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