英语词汇“free return”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

free return n. Astronautics a return flight of a spacecraft accomplished without significant expenditure of fuel through making use of planetary gravitation; usually attributive.

ΘΚΠ

society > travel > air or space travel > space flight > [noun] > a space shot or flight > course or trajectory of spacecraft > positioning on return path using gravitation

free return1963

1963 A. J. Schwaniger Trajectories in Earth-Moon Space (NASA Techn. Note D–1833) 2 When the manned mission is to land on the moon's surface, a ‘free return’ trajectory may be used so that if unforeseen difficulties arise..the astronauts will return safely to the earth.

1970 Times 15 Apr. 10/2 As the vehicle travelled round to the back of the moon, the effect of the lunar gravitation field was such as to swing the ship round on to a homeward trajectory. This is what the flight dynamics specialists call a free return trajectory.

2006 Analog June 26/2 If we can't send messages to the Mars station, we won't even be able to navigate a free return trajectory.

单词	free return
释义	> as lemmas free return free return n. Astronautics a return flight of a spacecraft accomplished without significant expenditure of fuel through making use of planetary gravitation; usually attributive. ΘΚΠ society > travel > air or space travel > space flight > [noun] > a space shot or flight > course or trajectory of spacecraft > positioning on return path using gravitation free return1963 1963 A. J. Schwaniger Trajectories in Earth-Moon Space (NASA Techn. Note D–1833) 2 When the manned mission is to land on the moon's surface, a ‘free return’ trajectory may be used so that if unforeseen difficulties arise..the astronauts will return safely to the earth. 1970 Times 15 Apr. 10/2 As the vehicle travelled round to the back of the moon, the effect of the lunar gravitation field was such as to swing the ship round on to a homeward trajectory. This is what the flight dynamics specialists call a free return trajectory. 2006 Analog June 26/2 If we can't send messages to the Mars station, we won't even be able to navigate a free return trajectory. extracted from freeadj.n.adv. < as lemmas
随便看	milk pitcher milk plant milk porridge milk posset milk pot milk pottage milk poultice meadow fescuegrass meadow flower meadow foam meadow foxtail meadow frog meadow gale meadow gallinule meadow gowan meadow grass meadow green meadow ground meadow hay meadow hen meadow leet meadow lily meadow lot meadow mouse meadow mushroom

> as lemmas