The two extra notches saved a little weight as well.
Keep in mind that the Ag model had a big hopper in the back seat and baggage area which moved the CG aft when loaded. Also the extra lift which is created with flaps moves the center of lift on the wing aft which helps to balance the extra weight in the hopper. So using 10 degrees in an Ag PA-18 is similar to using a little bit of flap in a Beaver on floats.The first of the three would be for some lift, good airspeed, and best sprayer/duster dispersion when applying. The second is for max lift I assume and the last for drag on landing (and Vx according to Piper).
Gary
Let’s get back on topic. My questions have nothing to do with Ag model. Can someone tell me how to source a bracket that has a 10 degree flap setting for the first notch, and would such a bracket require an STC?
I owned an original 1960 Pa-18/150 that was unaltered and had a notch at 10 and one at 50.Let’s get back on topic. My questions have nothing to do with Ag model. Can someone tell me how to source a bracket that has a 10 degree flap setting for the first notch, and would such a bracket require an STC?