The "turn" that airshow announcers and gamers call an "Immelmann" isn't. When gaining altitude it is a half-loop and when losing altitude it is a Split S. So what does an Immelmann turn look like. Well, today we call it a Hammerhead Stall.
Immelman would approach a two seater from the side, make his attack, fly past, pull the nose up, nearly stalling the plane, then kick the rudder in the direction the enemy was flying. This would bring him back down with an easy firing solution to make his next pass.
What we need is a card that rotates you 120 degrees to the left or right and doesn't change your altitude. Then we have the real Immelman turn as performed by the man himself.
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