| 释义 |
▪ I. ˈoverbank, a. Artillery.
[f. over prep. + bank n.]
Applied to a kind of gun-carriage for muzzle-loading guns, so constructed as to allow of the gun's being fired over the parapet.
1879Man. Artillery Exerc. 8 The adoption of overbank carriages, jointed rammers, &c., for our siege guns. 1884Mil. Engineering I. ii. 54 The guns of the siege train being adapted for overbank fire, embrasures are not required.
▪ II. overˈbank, v. Watch- and Clock-making.
[over- 27, 34.]
1. intr. See quot. and cf. bank v.1 4.
1884F. J. Britten Watch & Clockm. 132 There is no fear of overbanking, which is often observed after careless winding. Ibid. 181 When..the ruby pin pushes past the lever from the outside of it, the escapement is said to overbank. A chronometer escapement is said to overbank when from the same cause the escape wheel is unlocked a second time.
2. Aeronaut.
a. trans. To bank (an aircraft) too much when making a turn; also with the turn as obj.
1915Tech. Rep. Advisory Comm. Aeronaut. 1914–15 307 If a turn be overbanked it will bring into play a lateral component of gravity which produces sideslip. 1919W. G. Aston Aeronaut. made Easy xvii. 160 If on the turn the machine is overbanked, it will side-slip inwards. 1936Discovery Mar. 72/2 It is essential that the machine is not overbanked on a turn, since there are no ailerons to correct this.
b. intr. Of an aircraft: to bank too much. Also said of the pilot.
1929F. A. Swoffer Learning to Fly iv. 38 (heading) Why an aeroplane overbanks. 1932D. Garnett Rabbit in Air i. 17, I overbanked and didn't use enough rudder. 1952A. Y. Bramble Air-plane Flight xii. 181 During the turn..there is a greater tendency to overbank in a climb than in level flight.
Hence overˈbanking vbl. n.
1915Tech. Rep. Advisory Comm. Aeronaut. 1914–15 307 (heading) Objections to extreme overbanking. 1921Sci. Amer. 15 Oct. 275/3 The side-slip—a lateral movement of a plane caused by overbanking or by underbanking—is measured.
▪ III. ˈoverbank, n. Aeronaut.
[over- 29.]
The action of overbanking (overbank v. 2).
1919A. W. Judge Handbk. Mod. Aeronaut. xiii. 676 Inward slip..results from an overbank, which causes the machine to turn inwards, and slip down sideways. 1955M. Royce Studies for Student Pilots ii. 94 The inner main-plane now experiences the greater A[ngle of] A[ttack] and the increment of lift it obtains tends to neutralize the over⁓bank tendency. |