RUNWAY SLUSH EFFECTS ON THE TAKEOFF OF A JET TRANSPORT

In recognition of reduced takeoff and braking performance of aircraft on slush-covered runways of limited length, operational tests were conducted on a commercial jet transport aircraft under a controlled slush environment. The magnitude of slush drag forces was considerably greater than that predic...

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Bibliographic Details
Main Authors: SOMMERS,Daniel E, Marcy,John F, Klueg,Eugene P, Conley,Don W
Format: Report
Language:English
Subjects:
ATMOSPHERIC PRECIPITATION
CONVAIR 880 AIRCRAFT
DRAG
HAZARDS
JET TRANSPORT AIRCRAFT
LANDING GEAR
PERFORMANCE(ENGINEERING)
REDUCTION
RUNWAYS
SPRAYS
TAKEOFF
VEHICLE BRAKES
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Summary:In recognition of reduced takeoff and braking performance of aircraft on slush-covered runways of limited length, operational tests were conducted on a commercial jet transport aircraft under a controlled slush environment. The magnitude of slush drag forces was considerably greater than that predicted by earlier tests and theoretical approaches. Aquaplaning of the aircraft at high velocities caused a significant reduction in slush drag. Slush spray impingement against the aircraft and landing wheels was a significant factor in producing additional slush drag to that caused by the tires. Considering wheel size, a proportionately larger slush drag force was produced by the nosewheels than that produced by the main wheels. Considerable slippage in slush was experienced by the nosewheels and forward main wheels with little slippage on the aft main wheels. Considerable slush accumulated in recessed areas of the aircraft and presented a possible operational hazard. (Author)