High Quality Content by WIKIPEDIA articles! No. 613 (City of Manchester) Squadron was an Auxiliary Air Force later Royal Auxiliary Air Force squadron formed on 1 February 1939 at the then new municipal airport at Ringway, nine miles south of Manchester. The squadron served at first in the army cooperation role, and later during World War II became a tactical bomber unit. After the war the squadron reformed as a fighter unit and as such flew until its last disbandment in March 1957.