No that was the NTAMS hangar where the mighty N24's were housed
Well can I recall some flight testing on the NTAMS birds when DCA had some concerns regarding OEI climb degradation with some mods. An unrelated night out for numerous airline overnighting crews at Lims might have turned out differently if a chap hadn't programmed an 0-dark-30 launch in the Gonad for the following morning to get some climb data ... ah, memories.
The Nomad design was originally called Project N, and was for a single engined, turbine powered low wing?
There may well have been a low wing study before my time but the earliest single study I can recall was highwing.