PROBLEMS ASSOCIATED WITH THE PRESENCE OF WATER, SLUSH, SNOW AND ICE ON RUNWAYS

• Main Author: Herb,H. R.
• Other Authors: ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (FRANCE)
• Format: Text
• Language: English
• Published: 1965
• Subjects: Aircraft; Terminal Flight Facilities; Snow; Ice and Permafrost; (*RUNWAYS; *ICE); (*AERODYNAMICS; SYMPOSIA); HYDRODYNAMICS; JET AIRCRAFT; VELOCITY; CONTAMINATION; AIR TRAFFIC; FLIGHT SPEEDS; SAFETY; V/STOL AIRCRAFT; Stol; Ice; permafrost
• Online Access: http://www.dtic.mil/docs/citations/AD0652162; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0652162

It has always been difficult to estimate exactly the influence of the runway condition on the take-off and landing distance of airplanes. This problem has been aggravated by the jets entering the air traffic, for fast jets have high wing loadings and, therefore, high take-off and landing speeds. At high ground speeds, the runway contamination changes the value of the tire-to-surface friction coefficient. The contamination may further increase the drag in consequence of the forces required for fluid displacement. Finally, the hydrodynamic forces acting on the wheels in slush or water can, at high speeds, lift the tires completely off the ground. All these conditions have been examined thoroughly in tests and calculations. The report gives a survey on the latest investigations and on the consequences for practical flying operation which follow these results and for which appropriate safety precautions must be taken. The Flight Mechanics Panel requested this Study and procured, through the Consultant Program, the services of Mr. H. Herb to conduct the Survey and write the Report. (Author) NATO furnished.