> And I'm not aware of any KSP mod that helps you plan slingshots If you're willing to go for the full n-body package, Principia [0] has a pretty nice flight p

> And I'm not aware of any KSP mod that helps you plan slingshots If you're willing to go for the full n-body package, Principia [0] has a pretty nice flight planner that is quite usable for planning more complicated missions. KSP Trajectory Optimization Tool [1] is a non-mod alternative with some additional capabilities beyond flight planning as well. I think this one is designed for stock gravity so it should be usable in an otherwise vanilla install. [0]: https://github.com/mockingbirdnest/Principia https://github.com/mockingbirdnest/Principia [1]: https://github.com/Arrowstar/ksptot https://github.com/Arrowstar/ksptot