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 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 
 and a logitech controller for the flight controls? 
 pixhawk with a flysky transmitter/receiver. will be moving to it being fully autonomous soon tho 
 also, fuck yes.