Maybe you are referring to the circle-spawn-method I described
here?
That works and I first designed all our airfields that way, until I found out that blocking spawnpoints prevents the game from using them. But the problem is, I like to begin my flight in a hanger or under a camo tent...
For the detailed describtion:
Some hangers are not even with the ground. Their floor is a little higher f.e. 20cm. But the planes spawns at height 0 over ground, so the wheels stuck in the hanger while spawning. If you don´t move no problem, but the sligthes movement will cause your plane to jump up (to get on the floor hight) and explode either at the ceiling of the hanger or because a collision was detected, due to the wheels stucking in the concrete.