electron, Fis, Fis ondas threshold frequency; – de utilizacion/ing meca operating veh smooth hraking freno m alto, ing meca hrake, meca drag, veh hrake; – de de pie m alto, veh foothrake; – de Prony m alto, veh Prony hrake; – del remolque. PROM — memoria programable de solo lectura. prony brake — a simple friction brake dynamometer. freno prony — un dinamometro para los frenos de friccion. Conducción por pulso y deslizamiento—técnica de conducción de un vehículo freno prony—un dinamómetro para los frenos de fricción simple. propane.
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Prony brake – Wikipedia
A friction band is wrapped around half the drum’s circumference and each end attached to a separate spring balance. Power is calculated by multiplying torque by rotational speed. The difference between the two readings multiplied by the radius of the driven drum is equal to the torque.
The term ” brake horsepower ” is one measurement of power derived from this method of measuring torque. In practice more engine power can then be applied until the limit of the engine is reached. From Wikipedia, the dw encyclopedia.
prony brake | WordReference Forums
When the engine is running, the frictional force between the drum and the band will increase the force reading on one balance and decrease it on the other. If the engine speed is measured with a tachometerthe brake horsepower is easily calculated.
The Prony Brake is a simple device invented by Gaspard de Prony to measure the torque produced by an engine. You can help Wikipedia by expanding it.
The torque is then related to the lever length, shaft diameter and measured force. An alternate mechanism is to clamp a lever to the shaft and measure using a single balance. This page was last edited on 23 Octoberat The device is generally used over a range of engine speeds to obtain power and torque curves for the engine, since there is a non-linear relationship between torque and engine speed for most engine types.
In its simplest form an engine is connected to a rotating drum by means of an output shaft. The friction is increased by tightening the belt until the frequency of rotation of the shaft is reduced.
Essentially the measurement is made by wrapping a cord or belt around the output shaft of the engine and measuring the force transferred to the prny through friction. Views Read Edit View history.
A substantial pre-load is then applied to the ends of the band, so that each spring balance has an initial and identical reading. This technology-related article is a stub. Power output in SI units may be calculated as follows:.