TWA 6 8 10 12 14 16 20 52 4.9 5.8 6.3 6.6 6.7 6.8 6.9 60 5.2 6.1 6.6 6.8 7.0 7.1 7.2 75 5.5 6.4 6.8 7.1 7.3 7.4 7.6 90 5.7 6.6 7.0 7.2 7.4 7.6 7.9 110 5.6 6.5 7.0 7.4 7.7 7.9 8.2 120 5.3 6.3 6.9 7.3 7.6 7.9 8.4 135 4.7 5.7 6.5 7.0 7.4 7.7 8.3 150 3.9 4.9 5.8 6.5 6.9 7.3 8.0