This is the space plane Dragonfly from the novel Rocheworld by Robert L. Foward.
The Dragonfly is a glider-shaped plane with an air tight hull able to fly both in an atmosphere and in vacuum. She is capable of Vertical Take-Off and Landing using two electric fans powered by a nuclear reactor. On Rocheworld, she would assist the first team of explorers to make contact with an alien species…
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