Dihedral for Lateral Stability on The Crash Cast

Usually your explanations are pretty much on, but on dihedral, you got it all wrong Carlos. The projected wing area description of dihedral has been shown wrong multiple times in multiple sources. Get a good reference like Martin Simons, or some other text. Dihedral works because in a gust the airplane side-slips because the total lift vector gets rolled. Once side-slipping the wing in the slip direction has a higher angle of attack due to the dihedral angle and causes the correction. This is only true if the fin is small enough to not weather-vane. Dihedral stability only occurs is the fin area and dihedral are matched properly for this reason. If the fin is too large with too little dihedral, the slip ends up being coordinated and there is no correction. This is the dreaded spiral dive in old free flight designs and why they had such small fins. Sweep acts like dihedral for similar reasons, the wing side to the slip sees more perpendicular flow to the leading edge. The trailing panel sees more span-wise flow, and therefore less lift.
Look it up.