Refers to the pitch (or angle) of blades of a helicopter to direct movement. There are three types of pitch: A helicopter is an aircraft which is lifted and propelled by one or more large horizontal rotors (propellers). ...
Cyclic pitch is the individual angling of the blades on each revolution of the rotor. This affects the roll of the craft, moving the nose upward or downward or rolling the craft from side to side.
Collective pitch is the angling of all blades by an equal amount in unison. The pilot uses collective pitch control to rise vertically.
Differential collective pitch affects the yaw of the helicopter—the turning movement of the aircraft to the right or left. Differential collective pitch control allows the collective pitch of one rotor to be increased over the collective pitch of the other. This produces an increase in resistance, and more torque in one rotor than the other, turning the craft on its vertical axis.
R0t0r is from efnet ... Yaw or Yam is the name for the Levantine god of chaos and the power of the untamed sea as found in texts from the ancient city of Ugarit. ...
In much twentieth century music, by contrast, the spelling of a pitch is a matter of convenience; functional differences between enharmonically equivalent pitches such as those found in tonal music may be lacking completely.
Pitch Class Collection (or Pitch Class Set) -- a group of pitch classes, considered without regard to their order or to duplication of content.
A collection containing six members is called a hexachord, one with five members a pentachord, one with four members a tetrachord, one with three members a trichord, and a collection or p.c.
Each pitchcollection is used exclusively for a section of the piece, and the sections where the pitchcollection changes mark small-scale formal divisions.
The pitchcollection used through the twenty-fifth bar of the movement is restricted to only the pitches B-flat, C, E and F. The number eleven appears in several different rhythmic manifestations in this section; there are eleven distinct articulations, spaced four sixteenth notes apart, and separated from the following material by a fermata (mm.
While the pitch classes only span the range of a fifth, the aurally perceived range is actually a major seventh as the C is transposed down the octave.
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