A_centrifugal_clutch_has_four_shoes._When_the_clutch_is_at_rest,_each_shoe_is_pulled_against_a_stop_by_a_spring_so_that_it_leaves_a_radial_clearance_of_7.5_mm_between_the_shoe_and_the_rim._The_pull_exerted_by_the_spring_is_then_600_N._The_mass_centre_of_the_shoe_is_120_mm_from_the_axis_of_the_clutch._If_the_internal_diameter_of_the_rim_is_350_mm,_the_mass_of_each_shoe_is_5_kg,_the_stiffness_of_each_spring_is_60_N/mm_and_the_coefficient_of_friction_between_the_shoe_and_the_rim_is_0.2;_find_the_speed_of_the_centrifugal_clutch,_if_the_power_transmitted_is_40.168_kW.

A_centrifugal_clutch_has_four_shoes._When_the_clutch_is_at_rest,_each_

1.	A_centrifugal_clutch_has_four_shoes._When_the_clutch_is_at_rest,_each_shoe_is_pulled_against_a_stop_by_a_spring_so_that_it_leaves_a_radial_clearance_of_7.5_mm_between_the_shoe_and_the_rim._The_pull_exerted_by_the_spring_is_then_600_N._The_mass_centre_of_the_shoe_is_120_mm_from_the_axis_of_the_clutch._If_the_internal_diameter_of_the_rim_is_350_mm,_the_mass_of_each_shoe_is_5_kg,_the_stiffness_of_each_spring_is_60_N/mm_and_the_coefficient_of_friction_between_the_shoe_and_the_rim_is_0.2;_find_the_speed_of_the_centrifugal_clutch,_if_the_power_transmitted_is_40.168_kW.
A.	83.779 r.p.m.
B.	800 r.p.m.
C.	104.66 r.p.m.
D.	1000 r.p.m.
Answer» C. 104.66 r.p.m.

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A centrifugal clutch is to transmit 35 kW at 1500 r.p.m. There are four shoes. The speed at which the engagement begins is 0.7 times the running speed. The inside radius of the pulley rim is 120 mm and the centre of gravity of the shoe lies at 80 mm from the centre of the spider. Coefficient of friction may be taken as 0.35. Determine intensity of pressure exerted on the shoes if the angle subtended by the shoes at the centre of the spider is 60° and the width of the shoes is 105.52 mm.
A centrifugal clutch has four shoes. When the clutch is at rest, each shoe is pulled against a stop by a spring so that it leaves a radial clearance of 7.5 mm between the shoe and the rim. The pull exerted by the spring is then 600 N. The mass centre of the shoe is 120 mm from the axis of the clutch. If the internal diameter of the rim is 350 mm, the mass of each shoe is 5 kg, the stiffness of each spring is 60 N/mm and the coefficient of friction between the shoe and the rim is 0.2; find the speed of the centrifugal clutch, if the power transmitted is 40.168 kW.
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