Steering with just vertical motion alone won't work unpowered as well? At that size the pump has quite something to do, and needs to be temperated. Here is a n

Steering with just vertical motion alone won't work unpowered as well? At that size the pump has quite something to do, and needs to be temperated. Here is a nice article from analysis, prior art, to some guesses about lot more details, just need your favorite translation tool: https://steadyhq.com/en/realitatsabzweig/posts/90669d9f-e2f2-4793-a213-be6570e77d80 https://steadyhq.com/en/realitatsabzweig/posts/90669d9f-e2f2... Power is needed for the pump to go up and down, eventual rudder/rotors, to keep hardware warm enough (!), and also large array because in contrast to Loon no transparent material but very reflective one, which has advantages but comes with more self-shading (counter with larger array). Also btw, propellers were present also on the later Loons already..