DavidSJ

Ah, that is a good point. A burn in LKO buys you far more energy than a Hohmann to Mun and slingshot/burn there.

Haven\'t checked all your numbers but note that the most efficient way to get to Kerbol is a Munar slingshot for Kerbin escape followed by a bi-elliptical transfer to Kerbol. I\'d guess you save about 5 km/s vs. a simple Kerbin escape followed by Hohmann transfer.

I did some calculations tonight for some maneuvers. I got: Mun landing -> Low Munar Orbit 575 m/s* Low Munar Orbit -> Mun/Minmus transfer orbit (assuming orbital plane alignment obviates need for change of inclination) 294 m/s (provides 308 m/s in hyperbolic excess velocity, resulting in 850 m/s at periapsis and 217 m/s at apoapsis) 3d 2h 24m transfer time, launch 90.5 degrees clockwise from Minmus Low Munar Orbit/Minmus transfer orbit -> Minmus landing 57 m/s burn to eliminate hyperbolic excess velocity 307 m/s burn to land* Minmus landing -> Low Minmus orbit 217 m/s* Low Minmus orbit -> Kerbin 166 m/s burn (provides 229 m/s in hyperbolic excess velocity, resulting in 45 m/s at apoapsis and <3254 m/s at periapsis, in atmosphere) 2d 6h transfer time * Actual cost will be somewhat higher; depends on thrust/mass ratio.