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The Effect of Spoiler Deflection On Airplane Braking Performance

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Presentation on theme: "The Effect of Spoiler Deflection On Airplane Braking Performance"— Presentation transcript:

1 The Effect of Spoiler Deflection On Airplane Braking Performance
John J. O’Callaghan 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 Friction (Braking) Force
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 Friction (Braking) Force
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. O’Callaghan National Resource Specialist – Aircraft Performance Office of Research and Engineering

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