Complex sentence: It was decided to power the aircraft using a licence-built version of the Rolls-Royce Avon R.A.7 this involved a re-design of the fuselage as the Avon was shorter, wider and lighter than the General Electric J47 that powered the North American built aircraft.
Split into simpler sentences: It was decided to power the aircraft using a licence-built version of the Rolls-Royce Avon R.A.7. This involved a re-design of the fuselage as the Avon was shorter, wider and lighter than the General Electric J47 that powered the North American-built aircraft.