US Navy Bureau of Aeronautics DR 56 flying-boat

[Graham1973]

I just stumbled across this early 1950's jet flying boat design on the NTRS. Does anyone know anything more about it?


http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930086537_1993086537.pdf

and

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930086549_1993086549.pdf