Here is some video of a plane 12 foot long 12 foot wing span...
The thrust to weight was close 1:1 dry..

If your going to build a large plane, it needs to be light and powerfull
in order to make it as safe to fly as any other model airplane...

Also I don't understand why the second B52 was also very heavy.

http://www.corpcomp.com/weeks1/Movies/DC10.WMV

http://www.corpcomp.com/weeks1/Movies/DC10_2.WMV

Eddie Weeks