
Image credit: Krafft Ehricke Papers / Space Global
Image source: NASM
Ryan XV-5 Vertifan at Wikipedia
Image credit: Ryan Aeronautical
Image source: SDASM Archives
Found an interesting nugget here.
Convair Shuttlecraft at Astronautix
Image credit: Krafft Ehricke Papers / Convair
Image source: NASM
McDAC A Alternate at Astronautix
Image credit: McDonnell Douglas
Image source: Numbers Station