Timing of turns less than rate 1

[hvogt]

Hello PSP1224

that's an interesting question. If you follow PANS-OPS down under your bank angle at high speeds would be 25 degrees. So the question would be: How long does a turn at 25 degrees take?

Since the time for a turn at a given bank angle is a linear function of speed the answer is quite simple (by my reckoning).

time [seconds] = TAS [knots] * 0.7

If you were flying with 300 kts TAS you would hence need 210 seconds for a three-sixty.

This is however just an approximation. Firstly, TAS is pretty useless in flight mechanics since what you really need is translatory speed against the earth's surface. Secondly the factor 0.7 is just an approximation.