TWA 6 8 10 12 14 16 20 52 4.8 5.7 6.3 6.6 6.8 6.9 7.1 60 5.2 6.2 6.7 7.0 7.2 7.3 7.4 75 5.6 6.5 7.1 7.4 7.6 7.7 7.9 90 5.7 6.7 7.2 7.5 7.7 8.0 8.2 110 5.7 6.7 7.3 7.7 8.0 8.2 8.5 120 5.4 6.5 7.2 7.7 8.1 8.4 8.8 135 4.8 5.9 6.8 7.3 7.8 8.2 8.9 150 4.0 5.1 6.0 6.7 7.3 7.7 8.5