Just got back from our first indoor flying of the season. Not too much carnage Yes the rudder on the Zoombi is roughly 8 in. high with a 5 in. chord. The tab is 1 by 4 in. This one at full deflexion is a little past the neutral point. I thought it might be too much, but it turned out fine. Rudder goes back to neutral and stays there fine. Servo is the Hobbyking HXT 900.