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Landing Ground Roll

Approximate landing roll distance from touchdown speed and average deceleration.

Formula

s = \dfrac{V_{td}^2}{2a}

Variables

sGround roll distance

V_{td}Touchdown speed

aAverage deceleration

Example

Vtd 60 m/s, a = 3 m/s²: s = 3600/6 = 600 m

Did You Know?

Landing distance scales with the square of touchdown speed — 10% faster means 21% more runway.

landing distance performance

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