The Effect of Spoiler Deflection

1
The Effect of Spoiler Deflection On Airplane
Braking Performance
John J. OCallaghan National Resource Specialist
Aircraft Performance Office of Research and
Engineering
2
Braking Forces on a Tire
wing
Direction of travel
Friction (Braking) Force
Ww Weight on wheels
Ww
3
Braking Forces on a Tire Spoilers Stowed
Wing lift reduces weight on wheels and braking
force
Lift
wing
Airplane Weight
Friction (Braking) Force
Direction of travel
Weight on Wheels Airplane Weight - Lift
4
Braking Forces on a Tire Spoilers Deployed
Spoilers reduce lift, increasing weight on wheels
and braking force
Lift
Spoiler
wing
Airplane Weight
Friction (Braking) Force
Direction of travel
Weight on Wheels Airplane Weight - Lift
5
Typical Values of the Friction Coefficient m
6
Effect of Spoilers on Weight on Wheels AA1420
7
Effect of Spoilers on Stopping Performance
8
The Effect of Spoiler Deflection On Airplane
Braking Performance
John J. OCallaghan National Resource Specialist
Aircraft Performance Office of Research and
Engineering