TWA 6 8 10 12 14 16 20 52 5.2 6.1 6.6 6.9 7.1 7.2 7.3 60 5.6 6.5 6.9 7.2 7.3 7.4 7.6 75 5.9 6.7 7.2 7.5 7.7 7.8 8.0 90 6.0 6.9 7.3 7.6 7.8 8.0 8.4 110 5.9 6.8 7.3 7.7 8.1 8.3 8.6 120 5.5 6.6 7.2 7.6 8.0 8.4 8.9 135 4.8 5.9 6.7 7.3 7.7 8.1 8.8 150 4.0 5.0 6.0 6.7 7.2 7.6 8.4