Worth a try, not sure how well it will work, servers get really laggy when you change a lot of blocks like that. Pistons are able to push blocks forward and people do make flying machines that way. Been wondering if it would be possible to tap into that kind of block movement but haven't really explored it

oh yeah, that is a good point. Would be many updates that would have to happen at once and synced on ticks. Probably more achievable with something smaller than something like an airship