Bell 533
Research helicopter built by Bell Helicopter / From Wikipedia, the free encyclopedia
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The Bell 533 was a research helicopter built by Bell Helicopter under contract with the United States Army during the 1960s, to explore the limits and conditions experienced by helicopter rotors at high airspeeds. The helicopter was a YH-40—a preproduction version of the UH-1 Iroquois—modified and tested in several helicopter and compound helicopter configurations. The Bell 533 was referred to as the High Performance Helicopter (HPH) by the Army, and reached a top speed of 274.6 knots (508.6 km/h; 316.0 mph) in 1969, before being retired.
Quick Facts Role, National origin ...
Bell 533 | |
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Bell 533 with engines and wings added | |
Role | Research helicopter |
National origin | United States |
Manufacturer | Bell Helicopter |
First flight | 10 August 1962 |
Status | On display, Fort Eustis, Virginia |
Primary user | United States Army |
Number built | 1 |
Developed from | YH-40 |
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