Does anyone have any specifications on that plane, or specifically the floats? Several sources claim the XC-47C / Edo Type 78 floats as being the largest ever made, but those look to be very close, possibly larger.
You're right about the cargo loading problem (among others), but I've been doing a bit of research on this bird and you'll find a lot of erroneous info out there as well. Besides the XC-47C prototype (which was lost in a crash), there were at least 4 and perhaps as many as 10 other wartime...