Constant speed drive for Boeing 727, made by Sundstrand Corporation
A constant speed drive (CSD) also known as a constant speed generator, is a type of transmission that takes an input shaft rotating at a wide range of speeds, delivering this power to an output shaft that rotates at a constant speed, despite the varying input. They are used to drive mechanisms, typically electrical generators, that require a constant input speed.
The term is most commonly applied to hydraulic transmissions found in the accessory drives of gas turbine engines, such as aircraft jet engines. On modern aircraft, the CSD is often combined with a generator into a single unit known as an integrated drive generator (IDG).
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also a speed-sensitive governor Generators, often one for engine systems and one for the aircraft ConstantSpeedDrive to maintain a constant frequency...
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writing/reading speeds. Original CD-ROM drives could read data at about 150 kB/s, 1× constant angular velocity (CAV), the same speed of compact disc players...
Scaled Composites. Concorde flew long distances at supersonic speeds. Sustained high speeds would be impossible with the high fuel consumption of afterburner...
a floppy or hard disk drive, or gramophone, which operates in CAV mode. In CAV mode, the spindle motor turns at a constantspeed, which makes the medium...
extracted to drive the compressor. The turbine exit gases still contain considerable energy that is converted in the propelling nozzle to a high speed jet. The...
the shaft output. The gas generator creates the hot expanding gases to drive the power section. Depending on the design, the engine accessories may be...
storage, constant linear velocity (CLV) is a qualifier for the rated speed of an optical disc drive, and may also be applied to the writing speed of recordable...
The stall cells rotate with the rotor blades, but at 50 to 70% of their speed, affecting subsequent airfoils around the rotor as each encounters the stall...
(starter-assisted restart) in order for the compressor to achieve sufficient rotational speed for successful ignition. For example, the Airbus A320 passenger jet has...
the propeller control lever. The constant-speed propeller is distinguished from the reciprocating engine constant-speed propeller by the control system...
the final drive of a car. Low pitch yields good low speed acceleration (and climb rate in an aircraft) while high pitch optimizes high speed performance...
provide air for combustion. Ramjets work most efficiently at supersonic speeds around Mach 3 (2,300 mph; 3,700 km/h) and can operate up to Mach 6 (4,600 mph;...
version was able to keep constant angle of attack but speed only during approach. When the possibility of maintaining of speed during entire flight was...
One version has three drive shafts instead of the usual one. This allows the three sets of blades to revolve at different speeds. An intermediate design...
model aircraft. The speed record for control-line pulsejet-powered model aircraft is greater than 200 miles per hour (322 km/h). The speed of a free-flying...
in contrast with other type of cartridge starter which acted directly to drive the engine piston down and so turn the rest of the engine over, such as...
applications. In detonative combustion, the flame front expands at supersonic speed. It is theoretically more efficient than conventional deflagrative combustion...
started manually by pulling a cable). After the Riedel unit has reached a speed of about 300 rpm, it automatically engages the compressor shaft of the turbojet...