The North American O-47 was a mid-1930's observation plane. Here is a pic:
We're restoring one. We used to HAVE one and a few years back an airline pilot landed it gear up, it caught fire and burned to the ground. So ... we're trying to get another one in the air, including some of the original structure of the one we used to have.
Note it has some windows under the mid wing and the visibility from it is is GREAT. It performed yeoman service around the USA running U-boat patrols. Had some success in the Caribbean and along the Atlantic coast during the war. Altogether a very pleasant-flying aircraft.
OK, here is a quick drawing of the flap. If you find any line drawing showing the flaps, you can estimate the angles close enough.
I got a pic above of the aileron travel limits (they are not connected to cables at this time) but didn't get pics of the elevator and rudder travel. I am not sure if they are hooked up with cables to this time but will look at THAT next time. Later this evening I can post a pic of the flap and the O-47, but Supercross is on right now and the racing takes precedence!