swash plate

swash plate
i. A component of a helicopter control system to change the pitch of a rotor blade by an up-and-down motion. A swash plate has two sections. The upper section, or moving star, can tilt in any direction. It rotates at the same speed as the rotor, as do the rods and appendages above it. The lower section, or fixed star, can only tilt. The lower, or nonrotating, race is tilted by the cyclic control, and the upper, or rotating, race has arms that connect to the control horns on the rotor horns. The collective pitch control lever raises or lowers the entire swash plate assembly and changes the pitch of all the blades at the same time. On the other hand, movement of the cyclic pitch control is transmitted to the rotating blades through the swash plate.
ii. As it relates to variable output pumps, it is the plate that helps to alter the stroke of the piston and, in turn, the output of the pump. Normally, it is used in a high-pressure fuel pump.
Swash plate angle varies the stroke of the pump and its output.

Aviation dictionary. 2014.

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  • Swash plate — Swash Swash, n. [Cf. {Swash}, v. i., {Squash}, v. t.] (Arch.) An oval figure, whose moldings are oblique to the axis of the work. Moxon. [1913 Webster] {Swash plate} (Mach.), a revolving circular plate, set obliquely on its shaft, and acting as a …   The Collaborative International Dictionary of English

  • swash|plate — «SWOSH PLAYT, SWSH », noun. a rotating circular plate inclined to the plane of its revolution, which gives and receives reciprocal motion to and from other parts of the mechanism: »A swashplate or like system links the pistons to a central shaft… …   Useful english dictionary

  • swash plate — noun Etymology: from obsolete swash slanting, of unknown origin 1. : a revolving circular plate set obliquely on a shaft and acting as a cam to give a reciprocating motion to a rod in a direction parallel to the shaft 2. [swash (I) ] …   Useful english dictionary

  • swash plate — [1] A plate serving the purpose of a swash bulkhead, but not extending to the bottom of the tank. [2] A rotating disc or face plate on a shaft that is inclined at an oblique angle to the axis of rotation and either imparts reciprocating motion to …   Dictionary of automotive terms

  • swash plate — Mach. an inclined circular plate on a rotating shaft for transferring force and motion to or from parts reciprocating in a direction parallel to the axis of shaft rotation. Also, swashplate. * * * …   Universalium

  • swash plate — noun an inclined disc revolving on an axle and giving reciprocating motion to a part in contact with it …   English new terms dictionary

  • swash plate-wobble plate — Device used to change rotary motion to reciprocating motion. Used in some refrigeration compressors …   Dictionary of automotive terms

  • Swash — Swash, n. [Cf. {Swash}, v. i., {Squash}, v. t.] (Arch.) An oval figure, whose moldings are oblique to the axis of the work. Moxon. [1913 Webster] {Swash plate} (Mach.), a revolving circular plate, set obliquely on its shaft, and acting as a cam… …   The Collaborative International Dictionary of English

  • plate — [1] The action of coating a material with some metal. Also called electroplate or anodize. [2] A flat piece of material. [3] Two lead alloy plates in each cell where the positive plate is made of lead peroxide and the negative plate is made of… …   Dictionary of automotive terms

  • swash — 1. v. & n. v. 1 intr. (of water etc.) wash about; make the sound of washing or rising and falling. 2 tr. archaic strike violently. 3 intr. archaic swagger. n. the motion or sound of swashing water. Etymology: imit. 2. adj. 1 inclined obliquely. 2 …   Useful english dictionary

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