lufta.org
H2 lifting gas? Aluminised polymer envelope? Pressurised? Flight ceiling? Feel free to tell me to shut up if any of those are commercial in confidence... :)
yep hydrogen, i use PU for the hulls currently (moving to ripstop nylon with a PU coating). i’m working on a 20-metre that will operate at 10km hopefully
also, are you selling these commercially?
not yet! hoping either for a defence grant or to sell to a defence company
I'd honestly buy one, or get it financed possibly. I have a business idea but there are very few manufacturers, so I was looking into it but I ain't an engineer