Jun 232014
Saw this on eBay a while back. No further data. I assume it’s from the early/mid 1960’s, early MOL era. I don’t imagine that it was a particularly serious study; I’ve never seen it’s like elsewhere, and it seems like it would be quite heavy and prone to leaks. A reasonable guess would put the diameter at 10 feet, standard for the time (same diameter as the Titan II/TIIIc core vehicle).
I tinkered a bit to fix the warping and clean up the image:
