The fun part of today was installing the stall warning device into the leading edge of the left wing. The device consists of a metal tab that protrudes about an inch out of the leading edge through a slot that I cut to size. The tab protruding from the leading edge is activated (pushed up) when the angle of attack / speed causes improper air flow across the airfoil when the wing is stalled. When the tab is pushed up it activates a horn in the cockpit. From what i'vre read people have indicated that the warning device is activated approximately 5 knots above stall. You literally assemble and wire this thing from scratch. It took a few hours but the instructions were exceptionally well written. Im glad i assembled and installed this now, before the leading edge is riveted to the spar. I will do the same with my leading edge lights.
The not so fun part which consumed the balance of my day was to finish prepping the wing skeleton for the skins. It was hours of painstakingly simple, mindless work.... I machine countersunk all the holes along the tops and bottoms of both wing spars where the skins are riveted to the spar. I deburred all rivet holes (both sides i might add) in all the wing ribs as well as the front and rear spars. Finally i dimpled all the rivet holes in all the ribs and the rear spar. I think i reverersed the wings in my wing stands about six times today. Whew! glad thats over. I imagine deburring and dimpling the skins will be about the same... anyway, its good mindless work for a night after (real) work.
Stall Warning Device
Stall device installed, wired and access panel in place
Hand Cut and Deburred this Slot for the stall warner device tab
