Questions tagged [solar-sail]

Questions regarding a 'sail' that can be attached to spacecraft to harness the sun's radiation to propel a ship in one direction or another.

4 questions with no upvoted or accepted answers
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Could a solar sail composed of smart glass stay near the L1 point of Venus?

From answers to this question i've learned that the Lagrangian L$_1$ point of Venus is not stable, despite the almost circular orbit of the planet and the fact that it has no moon. Nevertheless would ...
2
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Can impact lift produce greater than 1 lift to drag ratio?

At orbital velocity in low circular Earth's orbit, at an altitude where mean free path exceeds cross sectional area of a craft or wing. therefore aerodynamic lift becomes impossible (Consider ...
2
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0answers
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Is there a solar sail design that can deploy and retract at will?

I know a mission to Venus was conducted using a solar sail -- however, once unfurled using rotation kinetic energy, it could not be retracted. Would retracting a solar sail cause uncontrollable ...
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What is the optimal angle for a solar-sail deorbit towards the Sun when radial thrust is included?

In this answer there's a geometrical derivation of the optimal angle of a solar sail to deorbit a spacecraft into the Sun. The naive answer is 45° which would direct the reflected light directly ...