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Published on May 8, 2014
This is a tutorial explaining how to do a free return trajectory in Kerbal Space Program.Free Returns are trajectories that allow for a return back to your home planet, even if your engines fail, by looping you around the moon. I hope you find it useful, and enjoy the video!
I apologize for the microphone "puffs". I had the microphone a little close.
For images and diagrams, like those used in the video, just Google for "free return trajectory" and "apollo 13 trajectory".
It is also possible to do a Free Return that loops pro-grade around the moon, with a larger escape burn (the loop around the moon begins on the opposite side). This requires more fuel, but has the advantage of having the periapsis for both the moon and the planet on the same side (daylight, for instance). Example :http://i.imgur.com/xqFkVPh.png