>>2219651Airships sound great, anything that floats around water is a bonus and potentially life saving. A wind turbine could power the electrolysis to generate the hydrogen for lift and oxygen for high altitude flights breathing and also thrust. in liquid form, oxygen is used widely as an oxidizing agent for use in rockets, where it reacts with liquid hydrogen to produce the thrust needed for take-off.
electric engines could also eliminate the need for air intake combustion engines for shorter flights.
Here is the size you would need for a personal airship.
https://www.youtube.com/watch?v=xOJvtaiNp5chttps://www.guinnessworldrecords.com/world-records/443025-smallest-airshipSmallest airship | Guinness World Records
7 Oct 2016 ... The smallest airship has an envelope of 80.816 m3
Here is a good breakdown of calculations for airship lifting capacities.
>tldr volume (and lifting capacity) increases exponentially with airship lengthhttps://erik-engheim.medium.com/calculating-lifting-capacity-of-airships-48df5cd7d147this could really make the spar bouy design take off