Before anyone says this isn't safe, the glider is not going to be used for actual glides. A friend and I have been wanting to make something that will just float us to the bottom of small hills around our homes. Nothing that will achieve any major altitude. I was wondering if anyone had any designs for one of these? Also we are wanting to make it as cheap as possible, so what materials would you recommend for the frame as well as the fabric material? Starting off small with something simple to float down hills with, then someday I hope to build my own actual plane. Thanks for the help!