Aircraft Stall Speed in Banked Turns & Flap Configurations
Calculate accelerated stall speed (KIAS), G-load factor, and minimum maneuvering speed in steep turns.
Input Parameters
e.g. 50 KIAS for C172 clean, 55 KIAS for PA28
Standard steep turns are 45° or 60°
Calculation Results
Visual Growth Breakdown
Formula & How Aircraft Stall Speed in Banked Turns & Flap Configurations Works
In a banked turn, the lift vector tilts, requiring increased angle of attack to maintain altitude. The resulting load factor ($n = 1/\cos\theta$) increases total wing loading, causing stall speed to increase by the square root of the load factor ($V_S' = V_S \sqrt{n}$). At 60° bank, load factor is 2.0G and stall speed increases by 41.4%.
- Enter Clean Straight-and-Level Stall Speed Vs1 (KIAS) (KIAS): Input your target parameter value.
- Enter Bank Angle in Turn (Degrees) (deg): Input your target parameter value.
- Enter Wing Flap Configuration: Input your target parameter value.
- Enter Current Aircraft Weight (kg) (kg): Input your target parameter value.
- Enter Maximum Takeoff Weight MTOW (kg) (kg): Input your target parameter value.
- Apply Formula: Calculate using
Load Factor n = 1 ÷ cos(θ) | Accelerated Stall Speed V_s' = V_s × √n = V_s × √(1 ÷ cos(θ)). - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)
Why does stall speed increase in a steep turn?
Because total lift must support both aircraft weight and the centrifugal force in a turn ($L = W / \cos\theta$), the wing must generate more lift at the same airspeed by operating at a higher angle of attack, bringing the aircraft closer to its critical stall angle of attack.
Authoritative Standards & Verified Reference Citations
Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:
CASR Part 91 general operating and flight rules, Part 121 fuel reserves, and flight crew licensing standards.
Aviation weather services, standard atmosphere (ISA) profiles, METAR/TAF aerodrome weather reports.
Aeronautical Information Publication (AIP), En Route Supplement Australia (ERSA), and airspace procedures.
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