McDonnell Douglas cargo aircraft concepts

[Triton]

Artist's impression of McDonnell Douglas cargo aircraft concept circa 1972 found on eBay. Watercolor by aircraft illustrator David Beigle


Source:
http://www.ebay.com/itm/mc-donnell-douglas-concept-illustration-for-giant-cargo-aircraft-1972/281451177145?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003132420%26meid%3De498dc4ab7c14f0d8e3d6403eb0f175d%26pid%3D100005%26prg%3D20131003132420%26rk%3D1%26rkt%3D6%26sd%3D281451171420&rt=nc

 

[hesham]

From my dear Scott's site and ebay;

http://www.aerospaceprojectsreview.com/blog/?p=1862

 

[RAP]

http://www.ebay.com/itm/McDonnell-Douglas-concept-aircraft-circa-1970-original-watercolor/281904493987?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003132420%26meid%3Dd226c7c1cbc34ee580694076169cacce%26pid%3D100005%26rk%3D2%26rkt%3D6%26sd%3D281904477969

 

[GTX]

If you look, you will see the seller has other images available

 

[gabrielorosco]

http://www.ebay.com/itm/McDonnell-Douglas-concept-aircraft-circa-1970-original-watercolor/281904493987?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20131003132420%26meid%3Dd226c7c1cbc34ee580694076169cacce%26pid%3D100005%26rk%3D2%26rkt%3D6%26sd%3D281904477969

Do you know if this was a real project? Any ideia where I can find more informations? Thanks!