Larry, I'm not sure when it first appeared, but it was a Christmas gift to me in 1947 along with an O&R 19 Side port on spark ignition. I never did complete it as it was lacking in detail and just a little beyond my building expertise at that young age. So 68 years later I decided I needed to build it. Not the same kit of course. I built this one from plans. Also have the plans to the Miss Behave for larger engines. Yes it has a flat bottom airfoil. They didn't know any better in those days. Most of gas models were FF, so early control line airplanes carried over those design ideas of the time. This design could be made into a nice little c/l plane by moving the wing up on the center line using a modern stunt airfoil and adding more wing area via stationary flaps or possible movable flaps if so desired. I marvel at the fellows who actually got some flight out of the Baby Miss Behave with a sparky engine carrying a coil, pen- cell batteries and condenser. My hats off to them! Must have glided like a rock. Note, the BMB has a 24 inch WS and 90 squares. Richard