Prony brake definition is a friction brake or absorption dynamometer in which the pull on the flywheel friction blocks is measured by a spring balance or weighted lever. It is to attempt to stop the engine using a brake on the flywheel and measure the weight which an arm attached to the brake will support, as it tries to rotate with the flywheel. Prony brake definition of prony brake by merriamwebster. Prony brake dynamometer it works on the principle of converting power into heat by dry friction. The degree of retarding action is dictated by the force with which this frictional contact is applied. I like the prony brake, its kind of where the term brake horsepower originated. On this channel you can get education and knowledge for general issues and topics. It is the simplest form of absorption type dynamometer. Construction and working of prony brake dynamometer video lecture from chapter brakes and dynamometers in theory of machine for.
Construction and working of prony brake dynamometer theory of. It consists of two wooden blocks around a pulley fixed to the shaft of an engine, whose power is required to be measured. Senior design project report design of dynamometer for. A dynamometer is a device used to measure the frictional resistance or frictional torque. Construction and working of prony brake dynamometer, tom.
A prony brake see figure develops mechanical friction on the periphery of a rotating pulley by means of brake blocks that are. This frictional resistance or frictional torque is obtained by applying a brake, hence dynamometer is a brake with a device of measuring the frictional resistance or frictional torque. He then goes on to research methods of measuring the motors output where he discovers the prony brake which leads to the rope brake dynamometer. A shaft transmitting power from an ic engine is made of steel with e 200 gpa, and has a diameter of d0. Pony brake is one of the simplest dynamometers for measuring power output brake power.