I was thinking of starting a thread about this as well. What the heck is wrong with this plane? I entered the Su-33 cockpit and 5 minutes later I had no trouble performing turns, landing, flying straight. I switched to Su-27 and that thing can't fly straight without leaning to the left or to the right for a second. It also keeps climbing and I have to sit down on my joystick in order to prevent it's nose from going into a 15+ climb. I didn't even press the suicide key for disabling fly by wire system yet the plane goes breakdancing when you pull the stick harder. When trying to land, I can't fly straight, it keeps leaning to the left or to the right. One last thing, are the wheels made from paper or something? I can't press W without one of it messing up and then going into a drift, resulting in flames and this happens when I am driving on the runway with 40 km/h. This does not happen on the Su-33 nor the Su-25/Su-25T. When I played the mission Su-27 - Base Defense, it took me around 15 respawns/restarts to actually make it to the runway successfully without one of the wheels getting obliterated because of pressing W while moving at 40 km/h during taxi.
Help!