In addition to the trainers, Fairchild received a contract for two drone conversions, eventually named the
XBQ-3. They seem about as successful as the trainers.
The AAF was looking for a drone with enough of a payload for long range bomber missions.
The Fairchild was modified with a redesigned fuselage with a raised cockpit for a two man ferry crew. It was to be used as either an expendable or reusable aircraft with a 4000 pound payload...either an internal non drop able bomb, two drop able 2000lb bombs or or two torpedoes. The good-sized twin with its elaborate TV guidance system was considered valuable enough so it could be reused.
Interestingly, with a full fuel/weapon payload, its minimum airspeed was too high for it to land safely.
That meant its weapons would have to be dropped or fuel burned-off before a landing attempt.
Two prototypes were delivered to Wright Field, in April, 1944, one was damaged in July in a forced landing, the second was destroyed by fire soon after in another forced landing.
The Army eventually wrote off the program's $1.4 million dollar cost.
The AAF continued on with a version of the Navy Interstate TD2R twin drone, calling it the BQ-4.
Here are some photos from Wiki:
https://en.wikipedia.org/wiki/Fairchild_BQ-3My source "
American Aircraft Development of WWII: Special Types 1939-1945 " by Bill Norton, differs from the Wiki entry in some details.