Now we've really veered off, but if you're impressed by the legacy of the B-29, remember that its design was stretched to the B-50, to the C-97 and from there to the Guppy and from there to the Super Guppy. I wonder if all the old C-97 Super Guppies are grounded now? (Or the regular transports. There used to be several flying in and out of Miami IAP in late 80s, early 90s). And I used to watch the Super Guppy take off from NASA Houston not so long ago, and if it wasn't loaded, the rear wheels left the ground before the nose. I never, to this day, have been able to imagine how the designers knew that thing would fly. Especially with a big piece of a Titan missile or the Apollo Saturn on board. But at its heart (and tail and wings and, originally, engines) it's a B-29 all the way.
tom