Question $3$

$[9]$

A motorcycle with a three$-$cylinder engine requires an oil$-$powered multiple$-$disk clutch. The power demand is $100kW$ at $9000rpm.$ The preliminary design layout indicates that the maximum diameter of the clutch disks should not exceed $250mm.$ An oil's friction coefficient is $0,062,$ and the maximum permissible pressure is $1,6$MPa. Determine :

a$)$ Radii for the disks.

$[4]$

b$)$ Number of disks required.

$[3]$

c$)$ The clamping force.

$[2]$