While the introduction of the Merlin engine did improve the Mustangs performance & produce the bubble-canopied fighters with which we associate the name credit must be given to the Allison-engined variants that preceded it. From its inception in early 1940 the Mustangs development was extraordinarily rapid
- such was the need for a fighter at the time & the confidence in its design. By early January 1942 the Mustang was in service with the RAF flying low-level armed reconnaissance operations over Northern France. Despite later Merlin variants arriving in-theatre this remained a hunting ground for the Allison Mustangs through to D-Day & beyond
- a remarkable service length. In American hands the Allison-engined Mustangs performed as dive-bombers & fighters serving with distinction in North Africa & the Far East.