1.when i want to go to mun for example and it's on the left side of my ship, if i burn just vertically I'll get an encounter 100%. Now my question is why is everyone making the orbit first, vertical flight seems much more easier and efficient? 2.how do i calculate the efficiency of rocket, i mean which engine will fit best with some barrels? And btw, What's the difference between 0.24 and 0.24.2.