Just like landing gear is retractable on planes, the propellers might be retractable on awes, if they aren’t used for fine control of orientation / steering.
Ampyx Power AP-3 seems to have large foldable central propellers and tiny ones on the wingtips.
Do you have any photos of the Ampyx propellers?
Just what’s in the tweet I shared. They also have foldable propellers on AP2, visible for example here: https://twitter.com/AmpyxPower/status/1109116086732103683
(picture deleted, use link to see it rather)
Didn’t upload it on purpose. Don’t have the rights. If you do, it’s on you… until Article 13 gets passed.