Tail unit (English spelling)

…When we simply talk about wings, we are referring to these main wings. The tail unit is located at the tail of the aircraft, and its main purpose is to maintain the balance and stability of the aircraft. It generally has a horizontal tail that maintains the balance and stability of the aircraft's vertical (forward and backward tilt) and a vertical tail that maintains the stability of the aircraft's direction, but some aircraft have a V-tail that combines both (Figure 6-a). When a wing is attached behind the aircraft's center of gravity, it acts like a weather vane, and has a stabilizing effect that tries to return the aircraft to its original position when it sways and rotates around its center of gravity. …

*Some of the terminology that mentions "tail unit" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…単に翼といえばこの主翼を指す。尾翼tail unitは機の尾部にあって，機のつりあいと安定を保つのがおもな目的で，機の縦(前後傾斜)のつりあいと安定を保つ水平尾翼horizontal tailと，機の方向の安定を保つ垂直尾翼vertical tailをもつのが一般であるが，両者を兼ねたV尾翼をもつ航空機もある(図6-a)。　翼は機の重心より後ろに取りつけると風見と同様に働き，機がゆれて重心を中心に回転したとき，それをもとにもどそうとする安定作用をする。…

※「tail unit」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報