These are my latest version of my wings. They are air powered and open 13 ft. I made them over the course of a few years with some prototypes in between. I like the Steampunk version because it leaves all the workings exposed. You can also cover it with cloth to hide it completely. The idea is to make one frame with several covers so that you have wings for every occasion. I have a picture that I can't find with all the dimensions on it that will be added as soon as I find it.