Angle Speed 0 100.00% 90 5 99.62% 89.67 10 98.48% 88.63 15 96.59% 86.93 20 93.97% 84.57 25 90.63% 81.57 30 86.60% 77.94
That's a little too simplistic to be of use. Here's a table showing the indicated speed versus an actual of 90mph: