Wind-Tunnel Investigation of a Low-Drag Airfoil Section with a Double Slotted Flap

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Description

Tests were made of an 0.309-chord double-slotted flap on an NACA 65, 3-118, a equals 1.0 airfoil section to determine drag, lift, and pitching-moment characteristics for a range of flap deflections. Results indicate that combination of a low-drag airfoil and a double-slotted flap, of which the two parts moved as a single unit, gave higher maximum lift coefficients than have been obtained with plain, split, or slotted flaps on low-drag airfoils. Pitching moments were comparable to those obtained with other high-lift devices on conventional airfoils for similar lift coefficients.

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Bogdonoff, Seymour M. September 1, 1943.

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Tests were made of an 0.309-chord double-slotted flap on an NACA 65, 3-118, a equals 1.0 airfoil section to determine drag, lift, and pitching-moment characteristics for a range of flap deflections. Results indicate that combination of a low-drag airfoil and a double-slotted flap, of which the two parts moved as a single unit, gave higher maximum lift coefficients than have been obtained with plain, split, or slotted flaps on low-drag airfoils. Pitching moments were comparable to those obtained with other high-lift devices on conventional airfoils for similar lift coefficients.

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  • : 93R22083
  • URL: http://hdl.handle.net/2060/19930092793 External Link
  • Report No.: NACA-WR-L-697
  • Report No.: NACA-ACR-3I20
  • Center for AeroSpace Information Number: 19930092793
  • Archival Resource Key: ark:/67531/metadc61398

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National Advisory Committee for Aeronautics Collection

The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915 to undertake, promote, and institutionalize aeronautical research. On October 1, 1958 the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA).

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Creation Date

  • September 1, 1943

Added to The UNT Digital Library

  • Nov. 17, 2011, 5:13 p.m.

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  • Feb. 6, 2017, 1:26 p.m.

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Bogdonoff, Seymour M. Wind-Tunnel Investigation of a Low-Drag Airfoil Section with a Double Slotted Flap, report, September 1, 1943; (digital.library.unt.edu/ark:/67531/metadc61398/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.