| Development began in 1946 with the Helicopter Engineering and Research Corporation (HERC) in Philadelphia, headed by D.K. Jovanovich and F. Kozloski, where a small 2-seat prototype (N9000H) was built with the designation JOV-3. This aircraft, powered by a 125hp Lycoming O-290, was flown successfully in 1948. footages from National Aerospace Library credit The Royal Aeronautical Society | Historical helicopters videos ➡ |
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