phugoid

长周期振动

发音

UK /ˈfjuːɡɔɪd/
其它
US /ˈfjuˌɡɔɪd/

词形变化

phugoids 复数 phugoids

别名

fugoid

释义与例句

n.
  1. 1.

    The motion of an aircraft, missile, or other flying object continuously oscillating in a vertical plane due to the object pitching up and climbing, thus slowing down; then pitching down and descending, thus speeding up.

    起伏运动

    周期运动

    航空 商务 工程
adj.
  1. 1.

    Of the motion of an aircraft, missile, or other flying object: continuously oscillating in a vertical plane due to the object pitching up and climbing, thus slowing down; then pitching down and descending, thus speeding up.

    航空 商务 工程

词源

The adjective is a learned borrowing from Ancient Greek φῠγή (phŭgḗ, “fleeing, flight; escape; retreat”) (ultimately from Proto-Indo-European *bʰewg- (“to flee”)) + English -oid (“suffix meaning ‘having the likeness of, resembling’, forming adjectives and nouns”). The word was coined by the British aerodynamicist and engineer Frederick W. Lanchester (1868–1946) in his book Aerodonetics (1908), the author mistaking the meaning of φῠγή (phŭgḗ) to be “flight” in the sense of “the act of flying”: see the quotations. The noun is derived from the adjective.

来源：wiktionary