pumping planning

[steuben]

Anybody got any tips for planning multiple burns pump a ship out of the Kerbin SOI?

My plan is to start around 75000, pump my way up to the Mün and sling shot out of the SOI. 

With my first attempt at round three I would have to burn more  dv to slingshot past the Mün than to burn the rest of the way out.

[Red Iron Crown]

The technique is usually called "periapsis kicking", and it can help low acceleration ships eject more efficiently. I wrote a little thing about it here: http://forum.kerbalspaceprogram.com/index.php?/topic/98843-precomputed-low-twr-interplanetary-transfer-burns/

[Claw]

I recommend starting your PE above 100km (maybe 120km-ish). Also, Munar slingshots can be tricky to time for the ejection, without costing a lot of dV later to correct. Practically speaking, I find it better to focus on splitting the burns properly and getting the last orbit lined up for the final burn.