Slotted Flaps for several RC aircraft

An overview, video inspection, and short explanation of some of the slotted flap mods I have made to several of my RC aircraft. There is no sound, you don t need to hear me droning on. You can figure out what s happening from the video. If you have s, please ask. The link for NACA Technical Report 664 is below. It s an old report, but aerodynamic principles do not change. NACA was the predecessor to NASA. I bet those engineers had a blast researching all these issues.