I said I though the Aichi would be an easy one for the experts. But they hiven't pointed out that it was a fold-up airplane that could be unfolded in 15 minutes when taken out of its watertight submarine hangar at sea.
The Smithsonian site on the Dulles annex says that the Aichi was moved there in June, IIRC.
A more-complete description of the plane from the Smithsonian:
http://www.nasm.si.edu/research/aero...chi_serian.htm
Thanks for playing,
SC