How to use this calculator
- Enter Va. Use the published or candidate maneuvering speed.
- Enter stall speed. Use the matching 1g stall speed and configuration.
- Read implied n. The calculator squares the Va/Vs speed ratio.
- Compare to approved data. Use the result as a consistency check only.
How it works
This page reverses Va = Vs x sqrt(n) into n = (Va / Vs)^2.
Pair it with maneuvering speed, stall speed from Va and corner speed.
Worked example
Verified against the live calculator
A 105 kt Va and 54 kt stall speed imply n = (105 / 54)^2 = 3.78 g.
Frequently asked questions
How do you find load factor from Va?
Use n = (Va / Vs)^2, where Va is maneuvering speed and Vs is the relevant 1g stall speed.
Is this the certified limit load factor?
No. It is an implied value from two entered speeds. The approved aircraft data controls.
What if Va is less than stall speed?
The implied ratio is below 1 g, which is usually a sign that one of the entered speeds is not the right configuration or unit.
Why is this useful?
It is a consistency check when a published Va and a stall speed need to be compared with the square-root relation.
Method & assumptions
- Assumes the entered Va and Vs use the same aircraft configuration and weight basis.
- Does not certify a limit load factor or replace POH/AFM limitations.