Flight test investigation of rotorcraft wake vortices in forward flight.

Teager, Stephen A.; Biehl, Keith J.; Garodz, Leo J.; Tymczyszym, Joseph J.; Burnham, David C.; Federal Aviation Administration Technical Center (U.S.); United States. Department of Transportation. Federal Aviation Administration; Scientific and Engineering Solutions, Inc.

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

i

Flight test investigation of rotorcraft wake vortices in forward flight.

1996-02-01
By Teager, Stephen A. ; Biehl, Keith J. ; Garodz, Leo J. ; ...

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English

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Details:

Creators:

Teager, Stephen A. ; Biehl, Keith J. ; Garodz, Leo J. ; Tymczyszym, Joseph J. ; Burnham, David C.

Teager, Stephen A. ; Biehl, Keith J. ; Garodz, Leo J. ; Tymczyszym, Joseph J. ; Burnham, David C. Less -
Corporate Creators:

Federal Aviation Administration Technical Center (U.S.) ; United States. Department of Transportation. Federal Aviation Administration ; Scientific and Engineering Solutions, Inc.

Federal Aviation Administration Technical Center (U.S.) ; United States. Department of Transportation. Federal Aviation Administration ; Scientific and Engineering Solutions, Inc. Less -
Subject/TRT Terms:

[+]

Boundary Layer Separation Flight Tests Flow Hazards Helicopters Laser Doppler Velocimeters Rotary Wing Aircraft Tests Vortices Wakes Wake Votices
Publication/ Report Number:

DOT/FAA/CT-94/117
Resource Type:

Tech Report
Geographical Coverage:

Alabama ; New Jersey

Alabama ; New Jersey Less -
Corporate Publisher:

Federal Aviation Administration Technical Center (U.S.)
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.
Format:

PDF
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:d866cedf4f85f49ff7d50e5faf4b051951a311e8518f833ab3e6c3068a852f8f
Download URL:

https://rosap.ntl.bts.gov/view/dot/12234/dot_12234_DS1.pdf
File Type:

[PDF-17.53 MB]