I am having trouble with an ssto of mine. This is only my 4th ssto and 1st mk3 ssto. It is supposed to go to a mun station, pick up 4 kerbals, then go to a minmus station, and pick up 4 more and then come back to kerbin. When I was testing it for landing on the runway I took of the runway (near the end) and then aimed for the 10 degree marker on the nav ball, physical time warped till I was 1400 meters high and then I was going to turn around and land on the runway but this thing is very sensitive when turning and flips out and stalls a lot and I don't know why. I know that at like over 300 m/s planes typically do this but with must you can at least turn with some effort but this one is way to unstable for me to fly, but I m a beginner for sstos and planes in general and I am not a good pilot either (I can only land on the runway about a third of the time). I really want this to land on the runway and use mk 3 parts to be space shuttle-ish even though it doesn't have the orange fuel tank and/or the srbs. Here are some pictures to help you (I am new to the forum and don't know how to size to pictures or anything, and this is also my first time using imuger to post pictures too.). Also, please excuse any spelling mishaps I have.
Any tips?