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Problem#2 16-3 In the figure for Prob. 16-1, the inside rim diameter is 11 in and...
The figure shows an internal rim type brake having an inside rim diameter of 12 in and a dimension R = 5 in
The figure shows an internal rim type brake having an inside rim diameter of 12 in and a dimension R = 5 in. The shoes have a face width of 1.5 in and are both actuated by a force of 500 lbf. The mean coefficient of friction is 0.28. a) Find the maximum pressure and indicate the shoe on which it occurs b) Estimate the braking torque effected by each shoe, and find the total braking torque c) Estimate the resulting hinge-pin reaction
The double internal long shoe drum brake as shown in Figure 3 has a shoe outer diameter 420 mm and shoe width of 65 mm
Figure 3: Double internal long shoe drum brake The double internal long shoe drum brake as shown in Figure 3 has a shoe outer diameter 420 mm and shoe width of 65 mm. Each shoe is actuated by a force of 4500N. The coefficient of friction for the brake lining is 0.30. Find the magnitude of the maximum pressure and the braking torque.
The brake, shown in figure below, is 300 mm in diameter and is actuated by a mechanism that exerts the same force F on each shoe
The brake, shown in figure below, is 300 mm in diameter and is actuated by a mechanism that exerts the same force F on each shoe. The shoes are identical an have a face width of 30 mm. The lining is a of ceramic type having a coefficient friction of 0.35 and a pressure limitation of 1.1 MPa. Find the following: (a) Actuating force F. (b) Braking torque capacity
A double external long shoe drum brake is illustrated inFigure 10.37 . The face width...
A double external long shoe drum brake is illustrated in
Figure 10.37 . The face width of the shoes is 50 mm and the maximum
permissible lining pressure is 1 MPa . If the coefficient of
friction is 0.32 determine the limiting actuating force and the
torque capacity .
The figure shows a 400-mmidiameter brake drum with four internally expanding shoes. Vach of the hinge...
The figure shows a 400-mmidiameter brake drum with four internally expanding shoes. Vach of the hinge pins 4 and 8 sapports a pair of shoes. The sctuating mechanism is to be aranged to produce the same force F on each shoe. The face width of the shoes is 75 mm The material unel permits a coefficient of friction of 0.24 and a maximum pressure of 100o kPa.) (a) Determine the actuating force. (b) Estimate the brake capacity (c) Notingg that...
Question 1 [25 marks] Figure 1 shows a brake drum 325 mm internal diameter, acted on...
Question 1 [25 marks] Figure 1 shows a brake drum 325 mm internal diameter, acted on by two brake shoes which are mounted on a pin A, and pushed apart by two hydraulically operated pistons at B, each exerting a force of P on the shoe on which it makes contact. The blocks are centred on the horizontal centre line as shown in the figure. The coefficient of friction is 0.25. Find the value of P to produce a brake...
3. A multiple disc clutch has an outside diameter of 165 mm and inside diameter of 84 mm. The clutch material permits a maximum pressure of 262 kPa and has a coefficient of friction of 0.3. Determine...
3. A multiple disc clutch has an outside diameter of 165 mm and inside diameter of 84 mm. The clutch material permits a maximum pressure of 262 kPa and has a coefficient of friction of 0.3. Determine (a) the actuating force, (b) the number of discs needed (c) actual maximum pressure, (d) Initially, the speed of driving side is 500 rpm and driven side is stationary. If the mass moments of inertia for driving side and driven side are 11-30...
Consider the pickup truck with the following specs: Vehicle dimensions and weight: Curb Weight Manual (lb.)-...
Consider the pickup truck with the following specs: Vehicle dimensions and weight: Curb Weight Manual (lb.)- 8290 Front/Rear Axle Weights (lb.)- 4890/3400 Center of Mass Height (in)- 49 Wheelbase (in.) 172.40 Track Front (in.) 88.50 Track Rear (in.) -84.50 6 Speed Manual Transmission: st 5.79 2nd 3.30 3rd 2.10 4th .30 5th 1.00 Tires 225/70R20 Maximum Payload (lb.) 6120 Standard Towing (lb.) - 6000 Maximum Towing (Ib.) - 24,500 Max. trailer tongue load (lb.) 2500 6th 0.72 Final drive 4.88...
The symmetric brake shown in the figure has a width of 30 mm with a mean friction coefficient of 0.25. Note that L 150 mm 1 = , L 200 mm 2 = , L 200 mm 3 = and radius of the drum is 150 mm. For an...
The symmetric brake shown in the figure has a width of
30 mm with a mean friction coefficient of 0.25.
Note that
L 150 mm 1
= , L 200 mm 2
= , L 200 mm 3
=
and radius of the drum is 150 mm. For an estimated
actuating force of F=500 N for each brake, determine:
a) The maximum pressure on each shoe
b) The total brake
torque capacity
c) Comment on the self – energizing behavior...
Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre...
Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre A long cylinder of dielectric material can guide light via total internal reflection. This idea dates back to the 1870s and forms the basis of the modern fibre optics communication technology. As long as the diameter of these fibres is large compared to the wavelength of the infalling light, its wave nature is negligible and we can use Geometric Optics to study the propagation...
A double external long shoe drum brake is illustrated in
Figure 10.37 . The face width of the shoes is 50 mm and the maximum
permissible lining pressure is 1 MPa . If the coefficient of
friction is 0.32 determine the limiting actuating force and the
torque capacity .
The figure shows a 400-mmidiameter brake drum with four internally expanding shoes. Vach of the hinge pins 4 and 8 sapports a pair of shoes. The sctuating mechanism is to be aranged to produce the same force F on each shoe. The face width of the shoes is 75 mm The material unel permits a coefficient of friction of 0.24 and a maximum pressure of 100o kPa.) (a) Determine the actuating force. (b) Estimate the brake capacity (c) Notingg that...
Question 1 [25 marks] Figure 1 shows a brake drum 325 mm internal diameter, acted on by two brake shoes which are mounted on a pin A, and pushed apart by two hydraulically operated pistons at B, each exerting a force of P on the shoe on which it makes contact. The blocks are centred on the horizontal centre line as shown in the figure. The coefficient of friction is 0.25. Find the value of P to produce a brake...
3. A multiple disc clutch has an outside diameter of 165 mm and inside diameter of 84 mm. The clutch material permits a maximum pressure of 262 kPa and has a coefficient of friction of 0.3. Determine (a) the actuating force, (b) the number of discs needed (c) actual maximum pressure, (d) Initially, the speed of driving side is 500 rpm and driven side is stationary. If the mass moments of inertia for driving side and driven side are 11-30...
Consider the pickup truck with the following specs: Vehicle dimensions and weight: Curb Weight Manual (lb.)- 8290 Front/Rear Axle Weights (lb.)- 4890/3400 Center of Mass Height (in)- 49 Wheelbase (in.) 172.40 Track Front (in.) 88.50 Track Rear (in.) -84.50 6 Speed Manual Transmission: st 5.79 2nd 3.30 3rd 2.10 4th .30 5th 1.00 Tires 225/70R20 Maximum Payload (lb.) 6120 Standard Towing (lb.) - 6000 Maximum Towing (Ib.) - 24,500 Max. trailer tongue load (lb.) 2500 6th 0.72 Final drive 4.88...
The symmetric brake shown in the figure has a width of
30 mm with a mean friction coefficient of 0.25.
Note that
L 150 mm 1
= , L 200 mm 2
= , L 200 mm 3
=
and radius of the drum is 150 mm. For an estimated
actuating force of F=500 N for each brake, determine:
a) The maximum pressure on each shoe
b) The total brake
torque capacity
c) Comment on the self – energizing behavior...
Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre A long cylinder of dielectric material can guide light via total internal reflection. This idea dates back to the 1870s and forms the basis of the modern fibre optics communication technology. As long as the diameter of these fibres is large compared to the wavelength of the infalling light, its wave nature is negligible and we can use Geometric Optics to study the propagation...
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