Can We Combine Solar Sails and Ion Thrusters for Faster Space Travel?

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Discussion Overview

The discussion centers around the feasibility of combining solar sails with ion thrusters or other traditional propulsion methods for spacecraft. Participants explore the potential benefits and challenges of such a hybrid propulsion system, considering both theoretical and practical aspects.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that using both solar sails and ion thrusters could provide the speed of ion propulsion along with the continuous thrust of solar sails, drawing an analogy to sailboats that utilize both sails and engines.
  • Another participant expands the idea to include any traditional propulsion method alongside solar sails, not limiting the discussion to ion thrusters.
  • A different participant raises concerns about the mass of spacecraft, noting that solar sails require extremely lightweight designs to be effective, which may not be compatible with the added mass of other propulsion systems.
  • One participant shares a speculative concept of an ultra-thin aluminum solar sail with a massive diameter, suggesting that such a design could theoretically allow for rapid travel to nearby stars, but acknowledges significant challenges in building and deploying such a system.

Areas of Agreement / Disagreement

Participants express differing views on the practicality of combining solar sails with other propulsion methods, with some highlighting potential benefits while others emphasize the challenges related to mass and design. The discussion remains unresolved regarding the feasibility of such hybrid systems.

Contextual Notes

Limitations include assumptions about the scalability of solar sails with additional mass, the technical challenges of constructing large, lightweight sails, and the speculative nature of proposed designs.

GiantSheeps
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I've heard a lot of people talk about solar sails versus things like Ion thrusters, and it seems that both have their advantages and disadvantages. So I was wondering whether or not it's possible to use both on a single spacecraft ? That way you could get the speed of an ion thruster along with that constant push of the solar sail... Is this possible?

I guess what I'm thinking is something like one of those sail boats on Earth that also has a few engines on board. I know this is a completely different animal, but that's the same general idea, I think. I don't sail, so I'm not sure.
 
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Doesn't necessarily have to be Ion Thruster, I just want to know about using solar sails along with any other, more "traditional", propulsion method on a spacecraft .
 
Solar sails need extremely light spacecraft to be effective. I'm not sure if that scales well enough to combine it with other propulsion methods (=more mass) - the sail would have to be extremely large to give a notable effect.
 
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I once saw an article that described a solar sail made of aluminum, only two atoms thick, but a diameter the size of The Moon. It would weigh only one gram. Carrying a four gram payload, and boosted to 0.3 c with lasers it could reach the nearest star in only a few years, then beam back a selfie.

The only obstacles are building and deploying a system like that. Lots of luck.

P.s. The autocorrect on my iPad tried to change "nearest star" to "nearest Starbucks,". If I posted that, you would have all had a chuckle at my expense.
 

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