Title: Northrop YA-9A
The Northrop YA-9A was developed in response to a USAF request for a dedicated Close Air Support/ground attack aircraft. Northrop and Fairchild Republic were the two companies selected to build prototypes for a fly-off competition. The Northrop entry was designated YA-9 while the Fairchild aircraft was designated YA-10.
The first flight of the YA-9A was on May 30, 1972, and the fly-off competition ran between Oct. 10 and Dec. 9, 1972. The Air Force subsequently selected the A-10 as the winner of the contest on Jan. 18, 1973. The two prototype YA-9As were transferred to NASA for flight testing before being retired and preserved in Museums.
To maximise value, this title contains the flight manuals for the YA-9A and the later F-20A. Both have been scanned from good quality photocopies.