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The effects of some common surface irregularities on wing drag / by Manley J. Hood.
Connect to full text Available online
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- Book
- Government document
- Author/Creator:
- Hood, Manley J., author.
- Series:
- Technical note (United States. National Advisory Committee for Aeronautics) ; 695.
- Technical note / National Advisory Committee for Aeronautics ; No. 695
- Language:
- English
- Subjects (All):
- Airplanes--Wings.
- Airplanes.
- Drag (Aerodynamics).
- Wind tunnel testing.
- Physical Description:
- 1 online resource (19 pages, 14 unnumbered pages) : illustrations.
- Place of Publication:
- Washington, [D.C.] : National Advisory Committee for Aeronautics, 1939.
- Summary:
- The N.A.C.A. has conducted tests to provide more complete data than were previously available for estimating the effects of common surface irregularities on wing drag. The irregularities investigated included: brazier-head and countersunk rivets, spot welds, several types of sheet-metal joints, and surface roughness. Tests were also conducted to determine the over-all effect of manufacturing irregularities incidental to riveted aluminum alloy and to spot-welded stainless-steel construction. The tests were made in the 8-foot high-speed wind tunnel at Reynolds numbers up to 18,000,000.
- The results show that any of the surface irregularities investigated may increase wing drag enough to have important adverse effects on high-speed performance and economy.
- A method of estimating increases in wing drag caused by brazier-head rivets and lapped joints under conditions outside the range of the tests is suggested. Estimated drag increases due to rivets and lapped joints on a wing of 20-foot chord flying at 250 miles per hour are shown.
- Notes:
- Description based on online resource, PDF version; title from title page (TRAIL, viewed October 29, 2021).
- "March 1939."
- "Langley Memorial Aeronautical Laboratory."
- No Federal Depository Library Program (FDLP) item number.
- Includes bibliographical references (page 19).
- Electronic reproduction. Denton, Texas : University of North Texas, 2011. Electronic reproduction from print master produced by University of North Texas.
- Other Format:
- Print version: Hood, Manley J. The Effects of some common surface irregularities on wing drag
- OCLC:
- 1154792954
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