The Best of Bob Pease | PDF | Distortion | Amplifier
So when you travel one horizontal mile, the vertical ascent is 0.040000 mile, and the amount of track needed is - 1/cos (arctan 4%) or about 1.00079968 miles When you need to spiral up to ascend a vertical distance that is exactly 1 mile x cos ( arctan 4%) - the amount of track needed is exactly 25.0000000 miles, to get UP to Point X.