pitch-upn.

Brit.

/ˈpɪtʃʌp/, U.S.

/ˈpɪtʃˌəp/

Origin: Formed within English, by compounding. Etymons: pitch v.², up adv.¹

Etymology: < pitch v.² + up adv.¹

Aeronautics.

A sudden and uncontrolled upward pitch of an aircraft, esp. as experienced during an ascent or descent; (a tendency towards) deviation of this kind. Cf. pitch v.² 14f.

ΘΚΠ

society > travel > air or space travel > specific movements or positions of aircraft > [noun] > motion round lateral axis

pitching1903

pitch1920

pitch-up1955

1955 S.A.E. Jrnl. Apr. 40/2 In pitchup (sometimes referred to as digin, or overshoot) the airplane suddenly pitches up or digs in during a pullup or turn... It is the result of shock-wave formation.

1956 W. A. Heflin U.S. Air Force Dict. 389/2 Pitch-up, a marked tendency in an aircraft to pitch upward.

1976 Flight Internat. 31 Jan. 207/1 The aircraft is believed to have suffered a pitch-up moment on final approach and to have landed in a flat attitude.

2003 Aviation Week (Nexis) 20 Jan. 28 The flight control system already mitigates the pitch-up by rotating the nacelles forward 2-5 deg., but engineers want to further reduce the effect.

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	pitch-up
释义	pitch-upn. Brit. /ˈpɪtʃʌp/, U.S. /ˈpɪtʃˌəp/ Origin: Formed within English, by compounding. Etymons: pitch v.², up adv.¹ Etymology: < pitch v.² + up adv.¹ Aeronautics. A sudden and uncontrolled upward pitch of an aircraft, esp. as experienced during an ascent or descent; (a tendency towards) deviation of this kind. Cf. pitch v.² 14f. ΘΚΠ society > travel > air or space travel > specific movements or positions of aircraft > [noun] > motion round lateral axis pitching1903 pitch1920 pitch-up1955 1955 S.A.E. Jrnl. Apr. 40/2 In pitchup (sometimes referred to as digin, or overshoot) the airplane suddenly pitches up or digs in during a pullup or turn... It is the result of shock-wave formation. 1956 W. A. Heflin U.S. Air Force Dict. 389/2 Pitch-up, a marked tendency in an aircraft to pitch upward. 1976 Flight Internat. 31 Jan. 207/1 The aircraft is believed to have suffered a pitch-up moment on final approach and to have landed in a flat attitude. 2003 Aviation Week (Nexis) 20 Jan. 28 The flight control system already mitigates the pitch-up by rotating the nacelles forward 2-5 deg., but engineers want to further reduce the effect. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1955
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