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A windchest is a component of a pipe organ on which the pipes sit. As the organist plays the instrument, the keys, stops, and windchest work together as a mechanism (called an 'action') to direct pressurized air (called 'wind') into the pipes, thus creating sound. Windchest design has varied considerably over the course of organ building ...
Electro-pneumatic action. The electro-pneumatic action is a control system by the mean of air pressure for pipe organs, whereby air pressure, controlled by an electric current and operated by the keys of an organ console, opens and closes valves within wind chests, allowing the pipes to speak. This system also allows the console to be ...
The pipe organ is a musical instrument that produces sound by driving pressurised air (called wind) through the organ pipes selected from a keyboard. Because each pipe produces a single pitch, the pipes are provided in sets called ranks, each of which has a common timbre, volume, and construction throughout the keyboard compass.
"Tubular-pneumatic action" refers to an apparatus used in many pipe organs built during the late 19th and early 20th centuries. The term "tubular" refers to the extensive use of lead tubing to connect the organ's console to the valves that control the delivery of "wind" (air under pressure) to the organ's pipes. Many such organs are extant 100 ...
They provided the organ with a new electrical, detached console. The wind pressure was lowered, new stops installed, the manual compass extended, the pipe work revoiced in a romantic style and the key- and stop-actions made electro-pneumatic. Fortunately, the old wind-chests and the Hinsz console were preserved. [8]
The organ's wind supply is the most powerful ever used in a pipe organ. The DC motors for the original eight blowers had a total power of 394 horsepower (294 kW). These were replaced with AC motors in the early 1990s, which have a total of 600 horsepower (450 kW) and their seven blowers pump 36,400 cubic feet (1,030 m 3) of wind per minute. The ...
The Barker lever is a pneumatic system which multiplies the force of a finger on the key of a tracker pipe organ. It employs the wind pressure of the organ to inflate small bellows called "pneumatics" to overcome the resistance of the pallets (valves) in the organ's wind-chest. This lever allowed for the development of larger, more powerful ...
The second console is on the lower gallery and it duplicates the fourth manual of the main console. The organ has 124 stops, which sound from 6,718 pipes arranged on 26 wind chests. The longest pipe is about 10 metres long, the shortest one is only 13 mm. [3] Pipe diameters are from 50 cm to 4 mm. The materials used in the pipes include pine ...
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