FRICTION EFFECTS OF RUNWAY GROOVES, RUNWAY 4R-22L JOHN F. KENNEDY INTERNATIONAL AIRPORT
Final rept. on Phase 2,
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY NJ
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Wet and dry runway friction tests were conducted on concrete Runway 4R-22L at John F. Kennedy International Airport, New York City, using a Fixed Slip Runway Friction Tester. These tests were conducted to determine if significant friction increases or decreases were generated as a result of transversely grooving the runway surface with 38-inch-wide, 45 deg., V-shaped grooves, having a 1 38-inch pitch. Data analysis indicates that at the test speeds of 50 and especially 60 mih, an appreciable increase in overall wet runway friction values due to grooving was obtained for these series of tests. In addition, the treatment of the runway surface by the cutting of uniformly spaced grooves markedly smoothed the resultant wet runway friction values. The chemical removal of rubber from the touchdown area of the 22 end of the ungrooved runway substantially improved the friction values of this end compared to those of the untreated 4 end.
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