Matches in DBpedia 2014 for { <http://dbpedia.org/resource/De_Prony_brake> ?p ?o. }
Showing items 1 to 33 of
33
with 100 items per page.
- De_Prony_brake abstract "The de Prony Brake is a simple device invented by Gaspard de Prony to measure the torque produced by an engine. The term "brake horsepower" is one measurement of power derived from this method of measuring torque. (Power is calculated by multiplying torque by rotational speed.)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 belt through friction. The friction is increased by tightening the belt until the frequency of rotation of the shaft is reduced. In practice more engine power can then be applied until the limit of the engine is reached.In its simplest form an engine is connected to a rotating drum by means of an output shaft. A friction band is wrapped around half the drum's circumference and each end attached to a separate spring balance. A substantial pre-load is then applied to the ends of the band, so that each spring balance has an initial and identical reading. 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. The difference between the two readings multiplied by the radius of the driven drum is equal to the torque. If the engine speed is measured with a tachometer, the brake horsepower is easily calculated.An alternate mechanism is to clamp a lever to the shaft and measure using a single balance. The torque is then related to the lever length, shaft diameter and measured force.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.Power output in SI units may be calculated as follows:Rotary power (in newton-meters per second, N·m/s) = 2π × lever length (in meters, m) × rotational speed (in revolutions per second) × measured force (in newtons, N).Or in English units:Rotary power (in pound-feet per second, lb·ft/s) = 2π × lever length (in feet, ft) × rotational speed (in revolutions per second) × measured force (in pounds, lbs).".
- De_Prony_brake thumbnail Winnipeg_Tractor_Contests_1910._Prony_Brake_Dynamometers.jpg?width=300.
- De_Prony_brake wikiPageID "4293467".
- De_Prony_brake wikiPageRevisionID "596389689".
- De_Prony_brake hasPhotoCollection De_Prony_brake.
- De_Prony_brake subject Category:Dynamometers.
- De_Prony_brake type Artifact100021939.
- De_Prony_brake type Device103183080.
- De_Prony_brake type Dynamometer103260733.
- De_Prony_brake type Dynamometers.
- De_Prony_brake type Instrument103574816.
- De_Prony_brake type Instrumentality103575240.
- De_Prony_brake type MeasuringInstrument103733925.
- De_Prony_brake type Object100002684.
- De_Prony_brake type PhysicalEntity100001930.
- De_Prony_brake type Whole100003553.
- De_Prony_brake comment "The de Prony Brake is a simple device invented by Gaspard de Prony to measure the torque produced by an engine. The term "brake horsepower" is one measurement of power derived from this method of measuring torque. (Power is calculated by multiplying torque by rotational speed.)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 belt through friction.".
- De_Prony_brake label "De Prony brake".
- De_Prony_brake label "Frein de Prony".
- De_Prony_brake label "Freio de de Prony".
- De_Prony_brake label "Freno Prony".
- De_Prony_brake label "Pronyscher Zaum".
- De_Prony_brake sameAs Pronyscher_Zaum.
- De_Prony_brake sameAs Freno_Prony.
- De_Prony_brake sameAs Frein_de_Prony.
- De_Prony_brake sameAs Freio_de_de_Prony.
- De_Prony_brake sameAs m.0bvk34.
- De_Prony_brake sameAs Q577817.
- De_Prony_brake sameAs Q577817.
- De_Prony_brake sameAs De_Prony_brake.
- De_Prony_brake wasDerivedFrom De_Prony_brake?oldid=596389689.
- De_Prony_brake depiction Winnipeg_Tractor_Contests_1910._Prony_Brake_Dynamometers.jpg.
- De_Prony_brake isPrimaryTopicOf De_Prony_brake.
