How to use this calculator
- Enter 1g stall speed. Use the relevant aircraft configuration and weight.
- Enter load factor. Use the g load you want to screen.
- Read accelerated stall. Compare the resulting stall speed with the maneuver speed.
- Check bank equivalent. Use the equivalent bank only for coordinated level-turn context.
How it works
The relation is Vs_n = Vs x sqrt(n). For level coordinated turns, the equivalent bank is acos(1 / n).
Use this with load factor, maneuvering speed and stall speed by weight.
Worked example
Verified against the live calculator
A 50 kt 1g stall speed at 2 g becomes 50 x sqrt(2) = 70.7 kt.
Frequently asked questions
How do you calculate accelerated stall speed?
Accelerated stall speed is the 1g stall speed multiplied by the square root of load factor.
Is load factor the same as bank angle?
Not exactly. In a coordinated level turn, load factor is 1 / cos(bank angle), but other maneuvers can create load factor without the same bank angle.
Why does stall speed rise with load factor?
The wing must produce more lift at higher load factor, so it reaches maximum lift coefficient at a higher airspeed.
Can this replace aircraft limitations?
No. Use the POH/AFM, placards and approved training procedures for actual operation.
Method & assumptions
- Uses the square-root load-factor stall-speed relation.
- Does not model slips, turbulence, abrupt controls, configuration changes, CG or aircraft-specific limits.