Like a four wheel vehicle, a two wheel vehicle will also be subjected to gyroscopic and centrifugal couple when it takes a turn on a curved path. Let us consider a two wheel vehicle, (say, a scooter or a motor bicycle) taking a...
Tag - Mechanical
Consider any four wheel automobile (say, car) having wheels A, B, C and D, taking a turn towards left on a curved path, as shown in Fig (a). The wheels A and C are inner wheels, whereas B and D are outer wheels. While the vehicle...
Before discussing the gyroscopic effect on naval ships, first let us brief the terminology used in connection with the naval ship. Ship Terminology The front, top, and side views of a naval ship are shown in fig (a), (b) and (c)...
We already know that the angular acceleration is the rate of change of angular velocity. It is a vector quantity and can be represented both in magnitude and direction with the help of right hand screw rule. A body rotating in a...
The spring controlled governor of the Wilson Hartnell type is shown in Fig. In this governor, the bell crank levers are pivoted at the ends of two arms which rotate with the spindle. The vertical arms of the bell crank lever...
Governor Arrangement This is the most common type of governor. In the centrifugal type governors, rotation of the crank shaft is taken to a vertical spindle through suitable gears. It consists of two balls of equal mass, which...
Function of Governor The function of a governor is to automatically maintain the speed of an engine within specified limits whenever there is a variation of load. If the load on the engine increases, its speed decreases. So it...
So far, we have discussed the free vibrations of systems where a system once disturbed from its equilibrium position executes vibration indefinitely because of its elastic properties. In actual practice, this system will come to...
Consider a uniform shaft of negligible mass rigidly fixed at its upper end and carrying a disc at its lower end, as shown in Fig. If the disc is given a twist about its vertical axis and then released, it will start twisting and...
Critical or whirling or whipping speed is the speed at which the shaft tends to vibrate violently in the transverse direction. In other words, the speed at which resonance occurs are known as the critical speed. At critical...
