Formula for Radius of Turn

[underfire]

What is the context of the OP need for turn radius?

R= NM

Figure your true airspeed TAS, tailwind component TW, and FAA std bank angle of 18 degrees;

R= (V KTAS + V KTW)^2 * 0.0000449

Non-standard bank angle;

R= [(V KTAS + V KTW)^2 * (1.4589*10^-5)] / tan(desired bank angle)

Given a turn, what is your bank angle;

Bank Angle= tan^-1 {[(V KTAS + V KTW)^2 * (1.4589*10^-5)] / R}