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NACA-TN-3307
An investigation of a wing-propeller configuration employing large-chord plain flaps and large-diameter propellers for low-speed flight and vertical take-off
Year: 1954
Abstract: An investigation of the effectiveness of a wing equipped with large-chord plain flaps and auxiliary vanes in rotating the thrust vector of two large-diameter propellers through the large angles required for vertical take-off and low-speed flight has been conducted in the Langley 300 MPH 7- by 10-foot tunnel. The semispan model used was equipped with a 60-percent chord flap, a 30-percent-chord flap, and two large-diameter overlapping propellers.
Under static-thrust conditions, a maximum upward rotation of the effective thrust vector of 45° was obtained with the 60-percent-chord flap deflected 30° and the 30-percent-chord flap deflected 50°. With the addition of two auxiliary vanes, the upward deflection of the thrust vector was increased to 67°. With this configuration, vertical take-off could be made with a take-off attitude of 23° and at airplane weights up to 95 percent of the thrust. A method is presented for calculating the lift due to flap deflection and slipstream for small flap deflections if the lift due to flap deflection and slipstream for small flap deflections if the lift due to flap deflection at zero thrust and the lift due to flap deflection at zero forward speed are known.
Under static-thrust conditions, a maximum upward rotation of the effective thrust vector of 45° was obtained with the 60-percent-chord flap deflected 30° and the 30-percent-chord flap deflected 50°. With the addition of two auxiliary vanes, the upward deflection of the thrust vector was increased to 67°. With this configuration, vertical take-off could be made with a take-off attitude of 23° and at airplane weights up to 95 percent of the thrust. A method is presented for calculating the lift due to flap deflection and slipstream for small flap deflections if the lift due to flap deflection and slipstream for small flap deflections if the lift due to flap deflection at zero thrust and the lift due to flap deflection at zero forward speed are known.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:50:28Z | |
| date available | 2017-09-04T16:50:28Z | |
| date copyright | 01/01/1954 | |
| date issued | 1954 | |
| identifier other | BUNUYDAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/114058 | |
| description abstract | An investigation of the effectiveness of a wing equipped with large-chord plain flaps and auxiliary vanes in rotating the thrust vector of two large-diameter propellers through the large angles required for vertical take-off and low-speed flight has been conducted in the Langley 300 MPH 7- by 10-foot tunnel. The semispan model used was equipped with a 60-percent chord flap, a 30-percent-chord flap, and two large-diameter overlapping propellers. Under static-thrust conditions, a maximum upward rotation of the effective thrust vector of 45° was obtained with the 60-percent-chord flap deflected 30° and the 30-percent-chord flap deflected 50°. With the addition of two auxiliary vanes, the upward deflection of the thrust vector was increased to 67°. With this configuration, vertical take-off could be made with a take-off attitude of 23° and at airplane weights up to 95 percent of the thrust. A method is presented for calculating the lift due to flap deflection and slipstream for small flap deflections if the lift due to flap deflection and slipstream for small flap deflections if the lift due to flap deflection at zero thrust and the lift due to flap deflection at zero forward speed are known. | |
| language | English | |
| title | NACA-TN-3307 | num |
| title | An investigation of a wing-propeller configuration employing large-chord plain flaps and large-diameter propellers for low-speed flight and vertical take-off | en |
| type | standard | |
| page | 95 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1954 | |
| contenttype | fulltext |