TWA 6 8 10 12 14 16 20 52 4.5 5.2 5.7 6.2 6.4 6.6 6.8 60 4.8 5.5 6.2 6.7 6.9 7.0 7.2 75 5.1 6.0 6.6 7.0 7.3 7.5 7.7 90 5.4 6.5 7.0 7.3 7.5 7.6 7.9 110 5.4 6.4 7.1 7.5 7.8 8.1 8.4 120 5.1 6.2 6.9 7.5 7.8 8.1 8.6 135 4.6 5.6 6.5 7.1 7.6 7.9 8.6 150 3.9 4.9 5.7 6.5 7.1 7.5 8.2