Hello dear KSP community, I have recently started kerbal and made it up to Ike round trip without any casualties and a bunch of minmus, mun missions. But there is one thing that i haven't quite figured out yet; how do i achieve an orbit with a min PE of 50km at launch? I can burn it up to 70 km afterwards, its fine. But most of my missions goes with spending 2 of my 3 stages just for getting into a circular/eliptical orbit around kerbin. My latest mission was ike landing and returning. But i have done it pretty luckily i suppose, because on my way back, when i manuevered for kerbin and made my PE around 20km, i had only 6 litres of fuel left. Even tho i have used 10000x time acceleration for 1.5 years to have lowest deltaV during kerbin escape(using mechjeb). So i wouldn't call it an efficient run. My most efficient rocket contains 3 main stages with the following build up; -Stage 3: 3x LFB KR twin boar. -Stage 2: 4x LV-45. 720lt tank for middle engine, 3x360lt for symmetry engines with pipes going from side tanks to middle tank. -Stage 1: Rockomax 720lt tank with terrier engine. This is what my rocket looks like. The following things happen according to my launch types, 1. If i tilt my rocket too much to get circular orbit earlier, it mostly ends up not being able to lift the vehicle. 2. If i tilt it medium, i will have an AP of 100km when the 3rd stage runs out of fuel, then i burn around %90 of my second stage tanks to make my orbit circular. Then i will have a little boost with 3 side Lv-45's for my escape, then after dumping side engines, i will have 1 middle Lv-45 with a full tank thanks to fuel pipes. 3. If i dont bother tilting it and let it accelerate, i will have an AP of 140-150km, but will have to spend all my second stage fuel to make it circular. So option 2 was the best choice for me. But it still doesn't feel so efficient. Because one single Lv-45 burns for atleast 3 minutes for a proper escape. Which is pretty much the capacity of the tank. I'm sorry if i wrote it complicated. Will make it much more clear when i upload pictures. I would appreciate any help i can get. I don't know how Scott Manley can manage things with such small rockets. Maybe it is a matter of practice. Time will show Good day.