4 hour flight time... with hydrogen

[GJH105775]

http://uavpilot.co/products/worlds-first-hydrogen-powered-4h-endurance-multi-rotor-uav/

I figured that this was certainly noteworthy, I have seen a number of quadcopters reach the hour mark, with mostly hovering. four hours defiantly took me by surprise, and even more so that it was powered by combustion. When you think about it though H2 would be a perfect fuel as it is lighter than air.

 

[GJH105775]

Amazon may get a drone delivery system yet haha.

I have seen helium balloons connected to a quad.

 

[glowingturnip]

it'd be a bit dull though, watching it hover for 4 hours

 

[GJH105775]

Haha, I imagine a 3 hour normal flight time would not be too much to ask of it.