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heloman30

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## Homework Statement

I'm working on this to further my understanding of parts used in an aircraft braking system.

Using known weight, and constant acceleration determine braking moment for a tricycle gear airplane with two main landing gear brakes.

Mass- 12,292 kg

Acceleration: -1.4 m/s^2

Tire radius: 0.4445m

Brake Key Radius: 0.1016 (10 keys)

Is it possible to determine brake moment at wheel- to- brake keys (a specified radius inside the wheel) using the above information? This would be similar to determining the braking moment on a car wheel lug during deceleration.

## Homework Equations

F=ma

## The Attempt at a Solution

The aircraft has a deceleration force of 17,264.6 N, how do I use this information to determine braking moment, at a specified radius, ignoring wind, rolling resistance ect?

Googling I found the following equation: T = (BFw)(R)/ r

Where

T = Torque (Nm)

BFw= Brake Force wheel

R = Static laden wheel radius

r= Speed Ratio between wheel and brake

Is it correct to divide the linear force in half, for two wheel brakes, and use the result for BFw?

If so I come up with

T=16793.3 Nm converted= 12,385.36 Ft lbs

BFw= 8632.3

R= 0.4445m

r= 0.22857 (35" inch tire diameter to 8 inch "brake key" diameter )

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