They're still using pressurized gas tanks. Apparently, not even a drone is not too small for such things.
Hypx
joined 1 year ago
129
Errors by Boeing at Renton plant led to Alaska Airlines MAX 9 blowout, industry source says
(www.seattletimes.com)
There are fuel cell powered drones out there. Size hasn't been an issue for a long time.
This is what killed nuclear cargo ships in the past. Ports just don't want such things coming in all the time.