Weight? I weighed my older heavier StratuX and a lithium battery that would run it for at least an hour: 14 oz. I don't know the weight of the display, but may try out powered parachute. It's unlikely I'd fly without cellphone, and wondered: have people figured out how to display rPi on one? Apparently yes, but it looks somewhat complex. Maybe since all of this is still in Beta phase, most of us would wait until there's a flight ready solution akin to StratuX. Of course, that might sell for $500.