user @riocrokite made a very nice mod based on real technology called Inline Ballutes, a cross between a balloon and a parachute.  Original thread is here: https://forum.kerbalspaceprogram.com/index.php?/topic/121162-130-inline-ballutes-ib-v128-30052017/& Please go here for the release: I'm in the process of adopting and updating this, and rather than clutter  up the old thread, I've set up this thread to track any development issues   Sample usage: Duna aerocapture