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Observations in flight of the region of stalled flow over the blades of an autogiro rotor / by F.J. Bailey, Jr. and F.B. Gustafson.
- Format:
- Book
- Government document
- Author/Creator:
- Bailey, F. J. Jr., author.
- Gusfafson, F. B., author.
- Series:
- Technical note (United States. National Advisory Committee for Aeronautics) ; 741.
- Technical note / National Advisory Committee for Aeronautics ; No. 741
- Language:
- English
- Subjects (All):
- Rotors (Autogiros)--Aerodynamics.
- Rotors (Autogiros).
- Air flow.
- Flow visualization.
- Physical Description:
- 1 online resource (12 pages, 7 unnumbered pages) : illustrations.
- Place of Publication:
- Washington, [D.C.] : National Advisory Committee for Aeronautics, 1939.
- Summary:
- The flow over the inner halves of the rotor blades on a Kellett YG-1B autogiro was investigated in flight by making camera records of the motion of silk streamers attached to the upper surfaces of the blades. These records were analyzed to determine the boundaries of the region within which the flow over the blade sections was stalled for various tip-speed ratios. For the sake of comparison, corresponding theoretical boundaries were obtained. Both the size of the stalled area and its rate of growth with increasing tip-speed ratio were found to be larger than the theory predicted, although experiment agreed with theory with regard to shape and general location of the stalled area. The stalled region may be an important factor in both the rotor lift-drag ratio and the blade flapping motion at the higher tip-speed ratios. The method of study used in this paper should be useful in further studies of the problem, including the reduction of the size of the region.
- Notes:
- Description based on online resource, title from title screen (viewed May 29, 2020).
- "December 1939."
- "Langley Memorial Aeronautical Laboratory."
- No Federal Depository Library Program (FDLP) item number.
- Includes bibliographical references (page 12).
- Electronic reproduction. Denton, Texas : University of North Texas, 2011. Electronic reproduction from print master produced by University of North Texas.
- Other Format:
- Print version: Bailey, F. J. Observations in flight of the region of stalled flow over the blades of an autogiro rotor
- OCLC:
- 1156324007
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