Algunos proyectos interesantes
Myasishchev M-52
The Super Super Guppy. From what i under stand and stand to correction on this monster was proposed using the Douglas C133 as a starting point
Boeing C-17 large commercial airliner and a enlarged four-engine Boeing 763 which are capable of carrying 454 to 547 passengers or more back in 1997/1998.
Boeing C-97 AEW conversion proposal for the RAF.
The RAF needed and AEW platform and the request was to put the biggest radar in the nose of the C-97 as could be fitter. Due to funding constraints this was only a paper project
Boeing Model 473-60C Early jet air liner proposal
Early AEW proposals for the USAF including the DC-8 AEW