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Calcimator

Hydroplaning Speed Calculator

Calculate dynamic, viscous, and reverted rubber hydroplaning speeds from tire pressure. Critical for wet runway operations.

Inputs

PSI

C172: 42 PSI, C182: 55 PSI, B737: 200 PSI, B777: 220 PSI

Results

Dynamic Hydroplaning Speed

66.7 kt

Risk Assessment

Low

Spin-Down Speed46.7 kt
Viscous Hydroplaning Speed57.1 kt

Dynamic Hydroplaning Speed

66.7 kt

Risk Assessment

Low

How to Use This Calculator
  1. Enter your main tire pressure from the POH or tire placard.
  2. Optionally enter your expected ground speed for risk assessment.
  3. If your speed exceeds the dynamic threshold on a wet runway, exercise extreme caution.
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