[tools4fools]

I posted it already above:

It is also true that design aesthetics by the design team, irrespective of any initial misgivings about practicality, influenced the wing shape of the 262.

Then as well Boelkow:
http://books.google.co.th/books?id=O...oelkow&f=false

Betz and Boelkow doing wind tunnel research for Messerschmitt 1939:

1939 forschte er zusammen mit Ludwig Bölkow im Windkanal für die Firma Messerschmitt.

From wiki:
http://de.wikipedia.org/wiki/Albert_Betz

The Me 262 had first flown in 1942, and advanced versions incorporating
wings with sweep angles as high as 50' were studied ( r e f . 3). A 40' sweep version,
shown in figure 2, had been tested in a German wind tunnel in 1941 and reached the
prototype stage in early 1945 but was accidentally destroyed on the runway before its
first flight ( ref . 4).

From:
http://ntrs.nasa.gov/archive/nasa/ca...1986017719.pdf

Compared with 262 wing history:
http://i37.photobucket.com/albums/e6...111/SW2623.jpg

40 degrees wing testing in 41. Inner wing sweep added in 42-43.

So it seems:
a) outer wing sweep added to correct for CoG (and 'design aesthetics') in 1940
b) inner wing sweep added 42-43 after further research in wind tunnel in 41.

+++++