https://en.wikipedia.org/wiki/Vultee_A-31_VengeanceFrom April 1944, a number of Vengeance Mk IV series Is were made available to the 8th Air Force and assigned to target-towing flights and Combat Crew Replacement Center stations. All armament was removed and a light cable winch fitted in the rear fuselage for sleeve towing. Some of these aircraft continued to be flown with British national markings and serial numbers. By late June 1944, there were seven A-35Bs at RAF Cluntoe, seven at Greencastle, ten at RAF Sutton Bridge and six at RAF East Wretham. When the CCRCs were dissolved in the autumn, the Vengeances were transferred to combat groups, with most fighter and several bomber groups having one on hand at some time during 1945. A-35Bs did not show a high state of serviceability by this time and were generally considered troublesome to maintain. They were also designated RA-35B (R for Restricted) by this time.[24]