Item Details

Wind-Tunnel Studies of Effects of Construction Methods, Design Details, and Canopy Slots on the Aerodynamic Characteristics of Small-Scale All-Flexible Parawings

Paul G. Fournier and William C. Sleeman, Jr.
Format
Book; Government Document; Online; EBook
Published
Washington, D.C. : National Aeronautics and Space Administration : [For sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151], 1970.
Language
English
Variant Title
NASA TN D-5974
Series
NASA Technical Note
SuDoc Number
NAS 1.14:D-5974
Summary
A low- speed wind-tunnel investigation was conducted to determine the effects of canopy construction methods, design details, and canopy slots on the static longitudinal aerodynamic characteristics of all-flexible parawings. Construction details such as type of nonporous canopy fabric, glued or sewed seams, tape reinforcement, or cloth-weave orientation had little effect on maximum lift-drag ratios and resultant-force coefficients. The maximum lift-drag ratios varied from 2.2 to 2.5 for the various single-keel unslotted parawings, and from 2.2 to 2.4 for the slotted canopy parawings. Incremental reductions in the lengths of all the suspension lines caused corresponding reductions in the resultantforce coefficients and maximum lift-drag ratios. The available range for modulation of resultant-force coefficient and lift-drag ratio by shortening the control lines was very limited.
Description
91 p. : ill. ; 27 cm.
Mode of access: Internet.
Notes
Includes bibliographical references (p. 18).
Series Statement
NASA technical note ; D-5974
Logo for No Copyright - United StatesNo Copyright - United States
Technical Details

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    a| Wind-tunnel studies of effects of construction methods, design details, and canopy slots on the aerodynamic characteristics of small-scale all-flexible parawings / c| Paul G. Fournier and William C. Sleeman, Jr.
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    a| NASA TN D-5974
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    a| Washington, D.C. : b| National Aeronautics and Space Administration : b| [For sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151], c| 1970.
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    a| 91 p. : b| ill. ; c| 27 cm.
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    a| NASA technical note ; v| D-5974
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    a| Includes bibliographical references (p. 18).
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    a| A low- speed wind-tunnel investigation was conducted to determine the effects of canopy construction methods, design details, and canopy slots on the static longitudinal aerodynamic characteristics of all-flexible parawings. Construction details such as type of nonporous canopy fabric, glued or sewed seams, tape reinforcement, or cloth-weave orientation had little effect on maximum lift-drag ratios and resultant-force coefficients. The maximum lift-drag ratios varied from 2.2 to 2.5 for the various single-keel unslotted parawings, and from 2.2 to 2.4 for the slotted canopy parawings. Incremental reductions in the lengths of all the suspension lines caused corresponding reductions in the resultantforce coefficients and maximum lift-drag ratios. The available range for modulation of resultant-force coefficient and lift-drag ratio by shortening the control lines was very limited.
    538
      
      
    a| Mode of access: Internet.
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    a| Wind tunnels x| Aerodynamics.
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    a| Airplanes x| Parawings.
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    a| Sleeman, William C.
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    a| Langley Research Center.
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