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NASA-TN-D-552
Studies of the Retardation Force Developed on an Aircraft Tire Rolling in Slush or Wate
Year: 1960
Abstract: A series of unbraked (freely rolling) taxi tests were conducted at the Langley landing-loads track with a 32 x 8.8, type 7, 22-ply-rating ribbed-tread aircraft tire to obtain data on tire retardation forces developed during rolling in both slush and water. The forward speeds of the tests ranged from 59 to 104 knots. Tire inflation pressures of 350 and 115 pounds per square inch were used. Results indicated a parabolic increase of retardation force with increasing forward velocity for both slush- and water-covered runway surfaces. The retardation force was found to increase approximately linearly with increasing water depth. Drag coefficients appropriate to the equations used are presented. Calculations made to determine the effect of slush on the take-off distance of a jet transport are in agreement with data obtained from an actual take-off in slush for this airplane. This is an interim report which deals with the effect of slush on the acceleration and the ground-run distance of airplanes during take-off.
Subject: ACCELERATION (PHYSICS)
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:38:09Z | |
| date available | 2017-09-04T17:38:09Z | |
| date copyright | 01/01/1960 | |
| date issued | 1960 | |
| identifier other | DPBBFEAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/161083 | |
| description abstract | A series of unbraked (freely rolling) taxi tests were conducted at the Langley landing-loads track with a 32 x 8.8, type 7, 22-ply-rating ribbed-tread aircraft tire to obtain data on tire retardation forces developed during rolling in both slush and water. The forward speeds of the tests ranged from 59 to 104 knots. Tire inflation pressures of 350 and 115 pounds per square inch were used. Results indicated a parabolic increase of retardation force with increasing forward velocity for both slush- and water-covered runway surfaces. The retardation force was found to increase approximately linearly with increasing water depth. Drag coefficients appropriate to the equations used are presented. Calculations made to determine the effect of slush on the take-off distance of a jet transport are in agreement with data obtained from an actual take-off in slush for this airplane. This is an interim report which deals with the effect of slush on the acceleration and the ground-run distance of airplanes during take-off. | |
| language | English | |
| title | NASA-TN-D-552 | num |
| title | Studies of the Retardation Force Developed on an Aircraft Tire Rolling in Slush or Wate | en |
| type | standard | |
| page | 38 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1960 | |
| contenttype | fulltext | |
| subject keywords | ACCELERATION (PHYSICS) | |
| subject keywords | AERODYNAMIC COEFFICIENTS | |
| subject keywords | AERODYNAMIC DRAG | |
| subject keywords | AIRCRAFT TIRES | |
| subject keywords | JET AIRCRAFT | |
| subject keywords | RETARDING | |
| subject keywords | RUNWAYS | |
| subject keywords | SLUSH | |
| subject keywords | TAKEOFF | |
| subject keywords | WATER |