A Porter governor has a minimum speed of 134 rpm and a range of speed of 21 rpm. All four arms of the governor are equal in length, and each is equal to 250 m. The ball mass and the central mass loaded on the sleeve are 5 kg and 15 kg, respectively. Calculate the angle between the two upper arms of the governor when the governor starts to lift and when the governor is at maximum.

A Porter governor has a minimum speed of 134 rpm and a range of speed of 21 rpm. All four arms of the governor are equal in length, and each is equal to 250 m. The ball mass and the central mass loaded on the sleeve are 5 kg and 15 kg, respectively. Calculate the angle between the two upper arms of the governor when the governor starts to lift and when the governor is at maximum.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Question 2 A Porter governor has a minimum speed of 134 rpm and a range of speed of 21 rpm. All four arms of the governor are equal in length, and each is equal to 250 m. The ball mass and the central mass loaded on the sleeve are 5 kg and 15 kg, respectively. Calculate the angle between the two upper arms of the governor when the governor starts to lift and when the governor is at maximum.
The agricultural machine is powered by an electric motor through a flat beltsystem. The machine requires 6 flat belts and 40 kW power to operate at aspeed of 350 rpm. The pulley diameter of the machine is 650 mm and the pulleyof the electric motor is 330 mm. The centre distance between the pulleys is1100 mm. The belt speed is not to exceed 30 m/s. Calculate the tensions in thebelt.
The arms of a Porter governor are each 250 mm long and pivoted on the governor axis. The mass of each ball is 5 kg and the mass of the central sleeve is 30 kg. The radius of rotation of the balls is 150 mm when the sleeve begins to rise and reaches to certain radius at maximum speed. The governor has radius that is 175 mm at mid position. The speed range of the governor is 38 rpm, and the increment in speeds is constant in the three positions. Find : (1) the friction of the load which existed at the sleeve, and (2) the governor radius at maximum speed. The friction is ignore in mid position only.
The system shown below is made up of two pulleys attached to the same shaft, with radii ri and re of 0.29 mm and 0.43 mm, respectively. The total mass of the pulley system is 14 kg and its turning radius is 0.26 mm from its center. The mass of block A is 9 kg and the mass of block B is 2 kg. If the coefficient of kinetic friction between block B and the floor is 0.2, find the angular acceleration of the pulley.
Ruler of the "Porter" model, with the upper and lower arms of 178 mm each, fixed by a hinge 38 mm away from the center of rotation. The rotating balls have a mass of 1.15 kg each, and the axial weight affecting the bushing is 20 kg. The ruling commotion began =154. Elevation at 280rpm - The joints are at an angle of 30 to the vertical. Assuming that the force of friction is constant, find the minimum and maximum rotational speed when mg The angle of inclination of the arms to the vertical is 45
A loaded governor of the Porter type has equal arms and links each 250 mm long. The mass of each ball is 2 kg and the central mass is 12 kg. When the ball radius is 150 mm, the valve is fully open and when the radius is 185 mm, the valve is closed. Find the maximum speed and the range of speed. If the maximum speed is to be increased 20% by an addition of mass to the central load, find what additional mass is required.
The uniform cylinder has a mass of 30.0kg and is rotating about a horizontal axis through O at 1200 rpm. The coefficient of kinetic friction between the cylinders and braking levers is 0.200. If the spring tension is 100 N, calculate the time required for the cylinder to stop spinning.
In a porter governor the mass of the central load is 18 kgand the mass of each ball is 2kg. the top arms (250+X) mm while the bottom arms are (300+X) mm long. The friction of the sleeve is 20 N. If the top arms make 45 deg with the axis of rotation in the equilibrium position, find the range of the speed of the governor in that position Note X is the student roll no. for example if the student roll no is A20 then X=20
Each spring of a Pickering governor of a gramophone is 8mm wide and 0.15 mm thick with a length of 50 mm. A mass of 50 g is attached to each leaf spring at the centre. The distance between the spindle axis and the centre of mass when the governor is at rest is 10 mm. The ratio of the governor speed to the turntable speed is 15. Determine the speed of the turntable for a sleeve lift of 0.5 mm. Take E = 200 GPa.
Each spring of a Pickering governor of a gramophone is 8mm wide and 0.15 mm thick with a length of 50 mm. A mass of 50 g is attached to each leaf spring at the centre. The distance between the spindle axis and the centre of mass when the governor is at rest is 10 mm. The ratio of the governor speed to the turntable speed is 15. Determine the speed of the turntable for a sleeve lift of 0.5 mm. Take E = 200 GPa. Select one: A. 57 rpm B. 37 rpm C. 47 rpm D. 77 rpm Clear my choice ◄ BSC105C Pre-recordedLecture Topic11 v1.2
012/ A Porter governor has links 150 mm lang and are allached to pivots at a radial distance of 30 mm from the vertical axis of the govermor. The mass of cach ball is 1.75 kg and the mass of the sleeve is 25 kg. The governor sleeve ready to rise at 300 rpm when the links are at 30 to the vertical. Assuming the friction force to be constant, find the value of the Inction force minimum and maximum speed of rotation when the inclination of the links is 45' to the vertical Page 14 of 15
4. A loaded governor of the Porter type has equal arms and links each 250 mm long. The mass of each ball is 2 kg and the central mass is 12 kg. When the ball radius is 150 mm, the valve is fully open and when the radius is 185 mm, the valve is closed. Find the maximum speed and the range of speed. If the maximum speed is to be increased 20% by an addition of mass to the central load, find what additional mass is required. [Ans. 193 r.p.m.; 16 r.p.m.; 6.14 kg]