variable speed unit

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• Variable speed of light — The variable speed of light (VSL) concept states that the speed of light in a vacuum, usually denoted by c , may not be constant in some cases. In most situations in condensed matter physics when light is traveling through a medium, it… …   Wikipedia

• Variable speed air compressor — A Variable Speed Drive (VSD) Air Compressor [ [http://www.quincycompressor.com/qgv.html Variable Speed Drive Compressor] ] is an air compressor that takes advantage of Variable Speed Drive technology. This type of compressor uses a special drive… …   Wikipedia

• constant-speed unit — An engine driven unit used for variable pitch propellers. A CSU automatically permits adjustment of the pitch for varying the speed and power. This allows the propeller to operate more efficiently at any selected combination of RPM, manifold… …   Aviation dictionary

• Variable air volume — (VAV) is a technique for controlling the capacity of a heating, ventilating, and/or air conditioning (HVAC) system. The simplest VAV system incorporates one supply duct that, when in cooling mode, distributes approximately convert|55|F supply air …   Wikipedia

• Speed of light — The speed of light in the vacuum of free space is an important physical constant usually denoted by the letter c . [NIST and BIPM practice is to use c 0 for the speed of light in vacuum in accord with international standard ISO 31 5. See… …   Wikipedia

• Variable-frequency drive — A variable frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor.cite book | first=Sylvester J. |… …   Wikipedia

• Speed limit — For a discussion of the maximum speed possible in the universe, see speed of light and special relativity. A road speed limit is the maximum speed allowed by law for road vehicles. Speed limits are commonly set and enforced by the legislative… …   Wikipedia

• Variable-message sign — Sign over Interstate 94 in Saint Paul, Minnesota, advising of a road blockage during a winter storm …   Wikipedia

• Variable displacement — is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large, multi cylinder engines. Many automobile manufacturers have… …   Wikipedia

• Variable velocity — Velocity Ve*loc i*ty, n.; pl. {Velocities}. [L. velocitas, from velox, ocis, swift, quick; perhaps akin to v?lare to fly (see {Volatile}): cf. F. v[ e]locit[ e].] [1913 Webster] 1. Quickness of motion; swiftness; speed; celerity; rapidity; as,… …   The Collaborative International Dictionary of English

• Variable Specific Impulse Magnetoplasma Rocket — Artist s impression of several VASIMR engines propelling a craft through space The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is an electro magnetic thruster for spacecraft propulsion. It uses radio waves to ionize and heat a… …   Wikipedia