First off, what is a turtledeck? The answer is obvious at first, it is a wood platform on the back of the house, with a bunch of turtles sitting on it, right? Or maybe it is what you call the deck of a cruise ship that is for turtle pleasure? Well actually it is the round part of the plane behind the cockpit, that leads into the tail, as seen in this beautiful Sonex. So, now that we know what a turtledeck is, I can get into how I built one!. Like everything, It started with a plans review. The turtledeck skin was made of 2 smaller skins (a left and right) and a central spine of a stiffening C-Channel. The skin then is curved to make it rounded, pretty, and aerodynamic. I then prepared all the parts. The turtledeck formers were up to the plate first, they look like this: I made sure that they had no stress rising scratches. (rule of thumb is that if you can catch a fingernail in the scratch, then it is too deep and must be buffed out.) Aside from that I chec...