How to use this calculator
- Enter TAS. Use true airspeed for geometry.
- Enter turn radius. Use the radius of the coordinated turn.
- Read load factor. The calculator converts V squared over R into bank and g load.
- Compare with limits. Use approved aircraft data for actual limits.
How it works
The radial acceleration is a_r = V^2 / R. Then bank = atan(a_r / g) and n = 1 / cos(bank).
Use it with turn radius, standard-rate turn and stall margin.
Worked example
Verified against the live calculator
At 100 kt TAS in a 1,500 ft radius turn, radial acceleration is about 0.59 g, bank is about 30.6 degrees and load factor is about 1.16 g.
Frequently asked questions
How is turn load factor found from radius?
The calculator finds lateral acceleration V^2/R, converts that to bank angle, then uses n = 1/cos(bank).
Should I use indicated or true airspeed?
Use true airspeed for geometric turn radius and turn rate arithmetic.
Is this the same as the turn radius calculator?
It is the reverse workflow: start with radius and speed, then solve load factor and bank.
Does this include wind?
No. It is still-air turn geometry using airspeed and radius.
Method & assumptions
- Assumes a coordinated level turn and uses true airspeed for geometry.
- Does not model wind drift, power limits, altitude loss, buffet, aircraft handling or operating limitations.