Rule of Thumb

STOPPING AN AIRPLANE

To determine the speed at which an aircraft begins to hydroplane, multiply the square root of the tire pressure by ...

To determine the speed at which an aircraft begins to hydroplane, multiply the square root of the tire pressure by 9. A light twin-engine plane with a tire pressure of 36 pounds will begin hydroplaning about 54 knots, which means that aerodynamic braking will be the major source of stopping power above that speed when there is standing water on the runway. — Bruce Landsberg, pilot and writer

07/20/17