It's a Control Line Precision Aerobatics model. Essentially a C/L Pattern ship. They only go about 55 so we can pack all of the maneuvers within the 70 foot high hemisphere in which we operate them. The vertical surface doesn't do much, but on this model it would've helped to have it a bit larger and have a moveable rudder to counteract the 14 inch prop's GP. I just added two degrees of out-thrust to maintain line tension in combination inside/outside maneuvers.
Chris...