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Bank Angle, G-Force & Stall Speed Calculator

Calculate load factor G = 1/cos(θ), accelerated stall speed, and turn radius.

Input Parameters

Calculation Results

Load Factor (G-Force)
1.41 G
Accelerated Stall Speed
59.5kts
Stall Speed Increase
+9.5 kts (+18.9%)
Turn Radius
1,275 ft (389 m)
Rate of Turn
9.1 °/sec (3× Standard Rate)
Summary: At 45° bank angle, load factor is 1.41G. Stall speed increases from 50 kts to 59.5 kts.
Step-by-Step Calculation Solution
1.Load Factor G = 1 / cos(45°) = 1.414 G
2.Accelerated Stall Speed = Level Stall × √G = 50 × √1.41 = 59.5 kts
3.Turn Radius = V² / (g × tan(θ)) = 1275 ft (389 m)

Formula & How Bank Angle, G-Force & Stall Speed Calculator Works

Mathematical Formula
Load Factor G = 1 / cos(θ) | Stall Speed = Vs × √G

In a coordinated level turn, lift must increase to balance centrifugal force. At 60° bank, load factor is 2.0G and stall speed increases by 41.4% (√2).

How to Calculate Bank Angle, G-Force & Stall Speed Calculator (Step-by-Step)
  1. Enter Bank Angle (degrees °): Input your target parameter value.
  2. Enter Level Flight Stall Speed (kts): Input your target parameter value.
  3. Enter True Airspeed (TAS - kts): Input your target parameter value.
  4. Apply Formula: Calculate using Load Factor G = 1 / cos(θ) | Stall Speed = Vs × √G.
  5. Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)

What is the G-force at a 60 degree bank angle?

At a 60° bank angle in a level coordinated turn, the load factor is exactly 2.0 G.

How does bank angle affect stall speed?

Stall speed increases proportionally with the square root of the load factor: Vs(bank) = Vs(level) × √G.

Official Regulatory & Government Data Sources

Authoritative Standards & Verified Reference Citations

Independent & Verified

Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:

Australian Government Data Portal (data.gov.au)Government
Commonwealth of Australia

Open government data, scientific datums, and public sector mathematical reference datasets.

data.gov.au
National Measurement Institute (NMI)Government
Australian Department of Industry, Science and Resources

Australia's national authority on physical, chemical, and biological metric measurement standards.

www.industry.gov.au/national-measurement-institute

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