A blog is on my to 'do list' but don't hold your breath. I want to build and test before putting stuff out there. There is the matter of copyrights also. For those who are interested I will say to start by taking a picture of someone in a comfortable riding position. Draw a shell around that using a 3:1 airfoil profile or a 5:1 with a 2/3 Kamm length. The shell will be about 24" wide and cover from the shoulder to just below the knee when the leg is extended to the bottom of the stroke. Attach securely to the frame, NOT the handlebars. Many of the techniques used by the people at recumbent.com will apply. Sailplane plans are a good source. See
www.vintagesailplaner.com/Sheet1bis-9.pdf or the Aptera for ideas as well. Much of what is discussed in the Motorcycle and Aerodynamics forums will apply. If the shell has rounded sides and is attached to the frame the problem of side winds will be manageable. For materials, use what is available. Sheets of 4mm Coroplast, ABS, .016" aluminum, Luan, milk carton paper have been used with success. For bulkheads plywood, honeycomb aluminum, or foam insulation panels work well. I have used hard nylon tubing for curved ribs and angle stock aluminum for spars. This is a wide open field and new ideas can be tried with little expense or risk. Paper model techniques for the skin and composite cut and fold methods for the rigid supports are great. Some have tried PVC tubing frames or conduit but I think they are not as rigid for the weight.