Interested to fly in a solar balloon?
Why not to fly in a solar balloon? What is really a solar balloon? It is in fact a ultralight hot air balloon, built from a black plastic polyethylene film (15 to 20 microns), that uses heat radiation coming from the sun to provide lift. This experimental technique can be used for aerial photography or others recreational uses. Interested? Go to the following site: http://ballonsolaire.pagesperso-orange.fr/en-index.htm ...and have a good flight!