The picture I've shown is an actual working thing, though its probably better known by concept renderings and sketches of how it works
Heres a close up picture of part of a computer rendering of it:
https://www.aulro.com/afvb/images/im...2017/08/14.jpg
If its not guessed by tomorrow I'll put up a version of that pic with a wider angle of view.
Cheers
Dan

