Boeing designed the 47 for the military as cargo. They lost to the C5. C5 is front and rear load. Turns out the Rear load was harder than it appears and it took years and lots of Tax money to get it right.
Full disclosure; C5 Navigation Avionics repair (USAF)qualified
Twenty plus years Boeing Experimental flight test.
I know a little bit about both aircraft.
I sometimes think lots of tax money alone is enough to make things take more tax money and time. *bada*boom*kisk*