The RAF&39;s Gloster Meteor ended up being the first and only functional Allied jet fighter to actually enter combat in WWII. In March 1943, a jet prototype created by the Gloster company and loaded with a De Havilland H.1 engine made its first effective test trip. In July of 1944, pilots flying the first manufacturing version of the Meteor, the F.1 fighter, fought fearlessly in Battle of Britain underneath the No. 616 Squadron. The F.1 housed two Rolls-Royce Welland jet engines with the capacity of taking the fighter to rates of 668km/h and was reasonably effective in protecting the British homeland against German V-1 rockets. The F.1 ended up being later changed by the improved F.3 variation along with its Rolls Royce Derwent engines, changed canopy style, and increased fuel ability.