TWA 6 8 10 12 14 16 20 52 5.2 6.2 6.8 7.1 7.3 7.4 7.5 60 5.6 6.7 7.1 7.4 7.5 7.6 7.8 75 6.0 7.0 7.4 7.7 7.9 8.0 8.2 90 6.1 7.1 7.5 7.8 8.0 8.2 8.5 110 6.0 7.0 7.5 7.9 8.2 8.5 8.8 120 5.6 6.8 7.4 7.8 8.2 8.5 9.1 135 4.8 6.0 6.9 7.5 7.9 8.3 9.0 150 4.0 5.1 6.1 6.9 7.4 7.8 8.5