Found while trolling through Google for STOL data. The Fairchild M-232 STOL test bed using the wing in slipstream technique of the Crouch-Bolas Dragonfly. Kind of a proto OV-10...
Fairchild M-232 experimental short take-off...
The Fairchild M-225 was executive jet business transport
project powered by four J44 turbojets,it could accommodated
for seven-passengers and had a low swept wing configuration,
its estimated speed was 560 mph.