Hi there
Back in 2008 there was a thread on a so called "Flettner Tank". At least a picture:
Found on Ebay!
Cheers, Peter
"Siplicity is the ultimate sophistication" -Leonardo Da Vinci-
Great photo, you can see a small chain drive on the right. Is there more information about this vehicle?
I found here more detailed information: Unmanned Systems of World Wars I and II
https://books.google.de/books?id=fNjgCgAAQBAJ&pg=PA416&lpg=PA416&dq=Flettner+Tank&source=bl&ots=Op_ynX2eIY&sig=o6un3WRx4KiUky7zicm9kvlpyVA&hl=de&sa=X&ved=0ahUKEwjbkYbry-HRAhXK1SwKHTkCASgQ6AEIOjAH#v=onepage&q=Flettner%20Tank&f=false
