"Arhur Sack was by no means the only one considering aircraft with a low
span/chord ratio. In the Detsches Museum, Munich this wind tunnel model
can be seen. During my visit, the rooms wre just about to be renovated, so
an attendant could only tell me, that it was from the time 1939 to 45"
Not really eye-opening, if you'll tell me the source, I would try to mail the question
to the museum, although succes cannot be granted.
And yes, a "Bierdeckel" is a beermat, but here it's meaning is less clear to me. Could
have been used, as "on the back of an envelope", but could also be a nickname because
of the shape and may even have had a somewhat dismissive meaning then.
And I think, there's no need to apologise, Chris ! You perhaps know my opinion, that a
lot of those late WW II German designs had their source in the heavy consumption of
beer by those designers, who know for sure, that the war was long lost and their doing
already pointless. But forced to go on, they drowned there sorrows and frustration with
alcohol and the beermat was nearer then, than the drawing board.
