The back of these photos are stamped: 'Fairchild T-31 Trainer'.
The XNQ-1 basic/advanced trainer was developed for the US Navy and was first flown by Richard Henson on October 7, 1946. Delivered to the US Navy in 1947, after trials they were rejected.
The second aircraft (BuNo. 75726) was evaluated by the USAF in 1949 as a primary trainer and was selected on March 24, 1949. Fairchild would produce 100 aircraft as the model 129, USAF designation was T-31, however, the order was cancelled later in 1949, in favor of Beech T-34.
The second aircraft was still on the register on January 15, 2006.