| Title | Flight test investigation of rotorcraft wake vortices in forward flight. |
|---|---|
| Record ID | 56241 |
| Personal Name Creator |
Teager, Stephen A.; Biehl, Keith J.; Garodz, Leo J.; Tymczyszym, Joseph J.; Burnham, David C. |
| Source | 94p. in various pagings |
| Corporate Creator | Federal Aviation Administration Technical Center (U.S.); United States. Department of Transportation. Federal Aviation Administration; Scientific and Engineering Solutions, Inc. |
| Publisher | Federal Aviation Administration Technical Center (U.S.) |
| Publication Date | 19960200 |
| Language | English |
| Abstract | This report presents the results of helicopter flight test and wake vortex measurements which were designed to provide data necessary for the assessment of hazards to following aircraft. The tests described in this report were conducted using small probe airplanes and a Laser Doppler Velocimeter for wake vortex measurements during forward-flight helicopter operations. Four helicopters, having weight ranging from 7,600 to 70,000 pounds, were used in the test as the wake vortex generating aircraft. Wake vortex strength and decay characteristics as determined from the flight test results are discussed. In the absence of encounter measurements for the case of hover flight, it is recommended that small airplanes, at the same altitude and downwind of a hovering helicopter, maintain at lease 500 feet of separation. |
| Rosap ID | dot:12234 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/12234 |
| TRT Terms | Wakes; Flow; Vortices; Helicopters; Rotary wing aircraft; Laser doppler velocimeters; Tests; Flight tests; Boundary layer separation; Hazards |
| General Subjects | Wake votices |
| Classification | NTL - AVIATION - AVIATION; NTL - AVIATION - Aviation Safety/Airworthiness |
| Geographical Coverage |
Alabama; New Jersey |
| Report Number | DOT/FAA/CT-94/117 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/56000/56200/56241/DOT-FAA-CT-94-117_WithCorrectedFig4-14.pdf |
| Format | |
| Database | NTL Digital Repository |