Theory of Machines - MADE EASY Study Material for GATE, ESE and SES Exams

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Gyroscopic Effect on Aeroplanes

Let us analyse the effect of gyroscopic couple acting on the body of aeroplane for various conditions. Let the propeller

A radial cam with reciprocating roller follower is shown in Fig. (above). The following nomenclature is used in reference to

It is a device to connect two shafts whose axes are neither coaxial nor parallel but intersect at a point.

A mechanism built in such a manner that a particular point in it is constrained to trace a straight line

A pantograph is a four-bar linkage used to produce paths exactly similar to the ones traced out by a point

For a slider-crank mechanism, a simpler method to construct constant velocity and acceleration polygon on the configuration diagram itself has

When one of the turning pairs of a four-bar chain is replaced by a sliding pair, it becomes a single

In Fig. if AB is the input link, the force applied to the output, CD, is transmitted through the coupler

There are some examples of paradoxes which disobey the Gruebler’s criterion due to their unique geometry. The designer needs to

Free Vibrations: Elastic vibrations in which there are no friction and external forces after the initial release of the body. Forced

Centrifugal governors: Its action depends on the change of speed and centrifugal effect produced by the masses, known as governor

When a series of gears are connected in such a way that two or more gears rotate about an axis

Static Balancing A system of rotating masses is said to be in static balance if the combined mass centre of

Parallel Shafts Spur Gears: They have straight teeth parallel to the axes and thus are not subjected to axial thrust

According to Shape Wedge and flat cams: A wedge cam has a translational motion. The follower can either translate or

In Klein’s construction, the velocity and the acceleration diagrams are made on the configuration diagram itself. The line that represents

The Coriolis component is positive if the link AR rotates clockwise and slider moves radially outwards or if the link

Instantaneous centre of rotation or virtual centre. Let a plane body ‘P’ having non-linear motion relative to another plane body

Grashof’s law s + l ≤ p + q Here, s = Shortest link, l = Longest linkp, q =