First of all, please bear with me since I'm a newbie at Kerbal Space Program and have a rather lackluster knowledge of maths and physics. I built a rocket that looks like this, figuring I'd try to send a satellite into solar orbit or something interesting: http://imageshack.us/scaled/landing/51/fbi9.jpg It probably hurts the eyes and souls of any Kerbal veterans, but as I said, I'm a noob! Anyway, my problem is that the "skipper"-engine doesn't affect apoapsis or periapsis at all, I'm talking none, not even a meter more or less in full throttle after I reach space and get rid off the lower stage of the rocket, I've gotten multiple satellites and even a space station base into orbit before, using the same maneuvers (but different spacecraft) I'm using now, but this time the engine just doesn't seem to have any effect. I was just wondering if anyone know if this is a bug or if there is an actual reason for this.