| 单词 |
retro-fire |
| 释义 |
▪ I. retro-fire, v.|ˈrɛtrəʊfaɪə(r)|
Also retrofire.
[f. retro- + fire v.1]
trans. To ignite or fire (a retro-rocket); to fire a rocket engine so as to give (a spacecraft) backward thrust. Also absol.
1961Ann. Rev. Med. XII. 315 Periodically, a very light⁓weight disposable capsule may be retro-fired in such a way that the capsule together with all unwanted materials will be incinerated on re-entering the atmosphere. 1969[see free return s.v. free a. D. 2]. 1969Guardian 14 Mar. 1/8 At 5 31 (BST) over Hawaii, Scott retrofired the main service propulsion engine..and Apollo 9 began its long arching descent.
Hence ˈretro-ˌfiring vbl. n.
1962J. Glenn in Into Orbit 41 You superintend the retro⁓firing sequence from here with toggle switches. 1968Guardian 24 Dec. 1/3, 3 21 p.m.: second retrofiring to bring spacecraft into a circular orbit 69 miles above the moon's surface. 1971Ibid. 1 July 1/5 In order to carry out the descent to earth..retro-firing took place at 01.35.
▪ II. retro-fire, n.|ˈrɛtrəʊfaɪə(r)|
Also retrofire.
[f. retro- + fire n.]
The process or action of burning a retro-rocket. Also attrib.
1962J. Glenn in Into Orbit 42 The clock is pre-set on the ground according to a timing for retro-fire which we have computed before the mission. 1962Flight Internat. LXXXI. 263/1 Kauai Island acquires the spacecraft,..and checks the retro-fire clock for possible change if Mercury control so advises. Point Arguello..gives back-up command to the spacecraft after the clock initiates retro-fire. 1967New Scientist 16 Nov. 424/2 It is not impossible to visualize a carefully controlled descent, the only limitations being the weight of propellants needed for continuous retro-fire. 1974Encycl. Brit. Macropædia XVII. 369/2 Below the Command Module is the Service Module. It..contains the propulsion system for midcourse corrections, retrofire to achieve lunar orbit, and thrust to return from lunar orbit into Earth trajectory. |
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