After seeing the Spruce Goose I am astounded that people were actually
in that thing when it attempted to take off... I'm sure it only got up
about 18 foot and when it was a bit of a trouser filling experience
then it flopped into the sea/river again.

It would still be a unique simulation though. I seen it in some
museum in Oregon. I can remember there were smaller planes situated
or suspended under the wings of the Spruce Goose to illustrate the
size but when you see it close up it looks quite fragile... well I
certainly would not step in it if there was any possibility of
someone that could attempt to lift it off the ground.