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NACA-TR-695
Determination of ground effect from tests of a glider in towed flight
Year: 1940
Abstract: Report presents the results of an investigation made to find the effect of ground on the aerodynamic characteristics of a Franklin PS-2 glider. The lift, the drag, and the angle of attack of the glider in towed flight were determined at several heights from 0.14 to 1.19 span lengths and at various speeds for each height. Two wing arrangements were tested: the plain wing, and the wing with a nearly full-span 30-percent-chord split flap deflected 45 degrees. The experimental results for the plain wing were in good agreement with theoretical values calculated by the method of Wieselsberger for both the angle of attack and the drag coefficient at a height of 0.21 span length; Tani's refinements of the theory had a practically negligible effect on the computed values in this case.
Subject: AERODYNAMIC
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:41:07Z | |
| date available | 2017-09-04T17:41:07Z | |
| date copyright | 01/01/1940 | |
| date issued | 1940 | |
| identifier other | DWWUYDAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/164049 | |
| description abstract | Report presents the results of an investigation made to find the effect of ground on the aerodynamic characteristics of a Franklin PS-2 glider. The lift, the drag, and the angle of attack of the glider in towed flight were determined at several heights from 0.14 to 1.19 span lengths and at various speeds for each height. Two wing arrangements were tested: the plain wing, and the wing with a nearly full-span 30-percent-chord split flap deflected 45 degrees. The experimental results for the plain wing were in good agreement with theoretical values calculated by the method of Wieselsberger for both the angle of attack and the drag coefficient at a height of 0.21 span length; Tani's refinements of the theory had a practically negligible effect on the computed values in this case. | |
| language | English | |
| title | NACA-TR-695 | num |
| title | Determination of ground effect from tests of a glider in towed flight | en |
| type | standard | |
| page | 13 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1940 | |
| contenttype | fulltext | |
| subject keywords | AERODYNAMIC | |
| subject keywords | AERODYNAMICS | |
| subject keywords | ANGLE | |
| subject keywords | ATTACK | |
| subject keywords | BODIES | |
| subject keywords | CHARACTERISTICS | |
| subject keywords | COEFFICIENTS | |
| subject keywords | DRAG | |
| subject keywords | EFFECT | |
| subject keywords | FLAPS | |
| subject keywords | GLIDERS | |
| subject keywords | GROUND | |
| subject keywords | LIFT | |
| subject keywords | SPLIT | |
| subject keywords | TESTS | |
| subject keywords | TOWED | |
| subject keywords | WING | |
| subject keywords | WINGS |