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  2. List of Sikorsky S-70 variants - Wikipedia

    en.wikipedia.org/wiki/List_of_Sikorsky_S-70_variants

    This is a list of versions of the Sikorsky S-70 military helicopter family, that entered service starting in the 1979. It is in service with 35 countries globally, and is commonly known as the UH-60 Black Hawk, the name from its biggest user the United States Army.

  3. Variation (music) - Wikipedia

    en.wikipedia.org/wiki/Variation_(music)

    Variation is often contrasted with musical development, which is a slightly different means to the same end. Variation depends upon one type of presentation at a time, while development is carried out upon portions of material treated in many different presentations and combinations at a time. [1]

  4. Sikorsky UH-60 Black Hawk - Wikipedia

    en.wikipedia.org/wiki/Sikorsky_UH-60_Black_Hawk

    The Sikorsky UH-60 Black Hawk is a four-blade, twin-engine, medium-lift utility military helicopter manufactured by Sikorsky Aircraft.Sikorsky submitted the S-70 design for the United States Army's Utility Tactical Transport Aircraft System (UTTAS) competition in 1972.

  5. Musical improvisation - Wikipedia

    en.wikipedia.org/wiki/Musical_improvisation

    Another definition is to "play or sing (music) extemporaneously, by inventing variations on a melody or creating new melodies, rhythms and harmonies". [2] Encyclopædia Britannica defines it as "the extemporaneous composition or free performance of a musical passage, usually in a manner conforming to certain stylistic norms but unfettered by ...

  6. Musical form - Wikipedia

    en.wikipedia.org/wiki/Musical_form

    In music, form refers to the structure of a musical composition or performance.In his book, Worlds of Music, Jeff Todd Titon suggests that a number of organizational elements may determine the formal structure of a piece of music, such as "the arrangement of musical units of rhythm, melody, and/or harmony that show repetition or variation, the arrangement of the instruments (as in the order of ...

  7. Musical quotation - Wikipedia

    en.wikipedia.org/wiki/Musical_quotation

    Musical quotation is to be distinguished from variation, where a composer takes a theme (their own or another's) and writes variations on it.In that case, the origin of the theme is usually acknowledged in the title (e.g., Johannes Brahms's Variations on a Theme by Haydn).

  8. Sikorsky H-60 - Wikipedia

    en.wikipedia.org/wiki/Sikorsky_H-60

    The Sikorsky H-60 is a family of military helicopters built by Sikorsky Aircraft. All models use a modified mission symbol in addition to the 'H' vehicle type designator under the 1962 United States Tri-Service aircraft designation system (meaning, there is no aircraft named an "H-60" per se). The mission prefix (e.g. U, M, V) only has ...

  9. Call and response (music) - Wikipedia

    en.wikipedia.org/wiki/Call_and_response_(music)

    In music, call and response is a compositional technique, often a succession of two distinct phrases that works like a conversation in music. One musician offers a phrase, and a second player answers with a direct commentary or response. The phrases can be vocal, instrumental, or both. [1]