stall warning/aoa indicator
Henry,
I agree with Brian. I can't imagine needing or even finding one of these devices helpful in my 9A. I don't know if you have ridden in one, or have gotten a demonstration of the stall characteristics of the airplane but it is a real "NON EVENT." I'm not trying to be condesending, just trying to keep you from wasting money on something that could be better spent someplace else. I'm going to try and describe stalls in the 9A for you with no embellishment as they happen in both mine and the factory plane which I took transition training in.
Approach: Set up for minimum controllable airspeed and in level flight. Reduce power slightly and hold back on stick. At the buffet just slightly release back pressure with no noticable forward stick movement. The stall is over! If you were to do the same thing but not release backpressure on the stick the nose attitude would drop, but hardly at all and then the pressure recovery design of the Ronz Airfoil starts the plane flying again. Altitude loss will be 10-20ft. The markings on the altimeter are almost to course to measure it. Every pilot that I take up is always amazed by the way the nine does not stall.
Departure: Full throttle, prop forward, nothing but sky in the windshield. The attitude is so uncomfortable that this could never be achieved in normal flight. As the airspeed drops below 60 all of the attention for me is on the ball being centered. The mind starts to prepare itself for a violent drop. Here it is, the buffet. Gently releasing pressure, but again no forward stick movement and the buffet is gone. The plane continues climbing at the extreme attitude it was at the instant of the stall. Not only no altitude lost, but no noticable change in the climb rate.
Turning Departure: See above, but you are turning.
The only flight regime that could possibly be a problem would be a downwind to base, or a base to final turn with to steep of a bank angle. But once you start to fly yours you will see that the plane is hard enough to slow down to flap speed, and with flaps applied or even with none turning base at 80mph and final 80 or slightly less you are so far above stall speed that a stall is not likely. You really have to screw up to stall this airplane, and then it takes care of you.
My two cents,
Bryan 9A flying