

If your lift is too far ahead or behind your CoM, you start doing flips and crash into the ground.Īlso helps a lot if you check your CoM between Empty and Full fuel tanks. You should consider your CoM with Rockets as well, but it's much less important to being successful. The most important thing to remember is balancing your CoM (Center of Mass) with your Lift. Planes are a lot harder to build than rockets, but that doesn't mean they're very difficult. If you put it at exactly the CoM the steering's usually too sensitive so move it backwards to get more stability depending on your plane particulars and your preferences but don't go too far. You need to find the "sweet spot" and it's usually when you have CoL slightly behind CoM. A too maneuvarable plane will flip uncontrallably and you'll crash it for sure, too. Note that you can have "too much" of either stability or maneuverability, and that's the difficulty in building planes. This effect is always relative to the CoM and indeed the CoM is the "tipping point" where things change rapidly. The basic rule-of-thumb that might help you is that if you move the CoL towards rear your plane gets more stable whereas if you move it towards the front it gets more maneuverable. Without that information you can't really build a functioning plane.

Just have the Center-of-Lift (CoL, blue ball) and Center-of-Mass (CoM, yellow ball) indicators visible when you build your planes. If you just want the science just go to space as said above. Yes, in KSP rockets are easy and planes are hard.
