| Description: | Free-flight tests have been made to determine the zero-lift drag of several configurations of the XAAM-N-2 pilotless aircraft. Base-pressure measurements were also obtained for some of the configurations. The results show that increasing the wing-thickness ratio from 4 to 6 percent increased the wing drag by about 100 percent at M = 1.3 and by about 30 percent at M = 1.8. Increasing the nose fineness ratio from 5.00 to 6.25 reduced the drag coefficient of the wingless models a maximum of about 0.030 (10 percent) at M = 2.0. A corresponding change in nose shape for the winged models decreased the drag coefficient by about 0.05 in the Mach number range from 1.1 to 1.4; at Mach numbers greater than 1.6 no measurable reduction in drag coefficient was obtained. The drag of the present Sparrow fuselage is less than that of a parabolic fuselage which could contain the same equipment. |
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| Creator(s): | |
| Creation Date: | March 16, 1950 |
| Partner(s): |
UNT Libraries Government Documents Department
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| Collection(s): |
National Advisory Committee for Aeronautics Collection
Technical Report Archive and Image Library
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| Usage: |
Total Uses: 75
Past 30 days: 3
Yesterday: 0
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| Original Creation Date: | March 16, 1950 | |
| Description: | Free-flight tests have been made to determine the zero-lift drag of several configurations of the XAAM-N-2 pilotless aircraft. Base-pressure measurements were also obtained for some of the configurations. The results show that increasing the wing-thickness ratio from 4 to 6 percent increased the wing drag by about 100 percent at M = 1.3 and by about 30 percent at M = 1.8. Increasing the nose fineness ratio from 5.00 to 6.25 reduced the drag coefficient of the wingless models a maximum of about 0.030 (10 percent) at M = 2.0. A corresponding change in nose shape for the winged models decreased the drag coefficient by about 0.05 in the Mach number range from 1.1 to 1.4; at Mach numbers greater than 1.6 no measurable reduction in drag coefficient was obtained. The drag of the present Sparrow fuselage is less than that of a parabolic fuselage which could contain the same equipment. |
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| Keyword(s): | aircraft design, testing and performance | |
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| Serial Title: | NACA Research Memorandums | |
| Partner: |
UNT Libraries Government Documents Department
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| Collection: |
National Advisory Committee for Aeronautics Collection
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| Collection: |
Technical Report Archive and Image Library
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| Resource Type: | Report | |
| Format: | Text | |
| Rights: |
Access:
Public
License:
Public Domain
Statement:
No Copyright, Unclassified, Unlimited, Publicly available
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