I would observe that I think second guessing is a healthy part of any well controlled process and the goal of this framework is certainly not to restrict second guessing, rather itâs to improve judgment quality and thereby the acceptability and credibility of the judgment with those charged with second guessing them.
They can be flat root, fillet root, or major diameter fit. The purpose of this type of spline is to allow for angular misalignment between the shaft and mating detail. This is accomplished by crowning the male tooth. The tooth (usually) has a symmetrical crown about the centerline of the spline face-width.
On top of that, a root stall also guarantees some aileron effectiveness during the stall, giving you greater control of your plane, especially if the stall occurs in a banked turn. If your plane didn't have washout, in most cases it would mean the entire wing would stall at once, or worse yet, the wing tip could stall first if your ailerons were deflected.