Wheel-ground Rolling Friction Coefficient During Take-off

FAR 23 and FAR 25

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Concrete or Asphalt

0.02

Hard Turf

0.04

Short Grass

0.05

Long Grass

0.10

Soft Ground

0.10 - 0.30

Military Runway Condition

Dry:

Rolling

0.025

Brakes

0.30

Anti-Skid

0.38

Wet:

Rolling

0.05

Brakes

0.14

Anti-Skid

0.20

Snow:

Rolling

0.09

Brakes

0.10

Anti-Skid

0.15

Ice:

Rolling

0.05

Brakes

0.07

Anti-Skid

0.09