Sorry, your original post had rotor diameter listed as 27.5cm
If it is rotor radius that is 27.5 cm I retract my previous post.
Using your latest post I agree with your calculations that give the CF as approximately 87.17 N
(I prefer to work with angular rate which is ~ 251 rad/s
CF accn = angular rate ^2 * radius
CF accn ~ 17434 m/s^2)