How to use this calculator
- Enter stall speeds. Use positive and negative 1g stall speeds or conservative estimates.
- Enter limit loads. Use approved positive and negative limit load factors.
- Enter Vne. Use the never-exceed speed as the right-side marker.
- Read corner speeds. Review the simplified positive and negative envelope.
How it works
The simplified stall curves use n = (V / Vs)^2, capped by the entered positive and negative limit loads.
Pair it with maneuvering speed, accelerated stall and stall speed.
Worked example
Verified against the live calculator
With a 50 kt positive stall speed and 3.8 g limit load, the positive corner speed is 50 x sqrt(3.8) = 97.5 kt.
Frequently asked questions
What is a V-n diagram?
A V-n diagram plots aircraft speed against load factor, showing stall boundaries and structural limit loads.
What is corner speed?
Corner speed is the speed where the stall boundary reaches the limit load factor. For the positive side it is often associated with Va arithmetic.
Is this a certified V-n diagram?
No. It is a simplified educational envelope from entered stall speeds, limit loads and Vne.
Why enter negative stall speed separately?
Negative-lift stall behavior can differ from positive-lift stall behavior, so the calculator does not assume they are the same.
Method & assumptions
- Uses simplified parabolic stall boundaries capped by entered limit loads.
- Does not model gust envelopes, maneuvering category details, compressibility, structural design data or certified aircraft limitations.