called the Boeing 707-420, which was identical to the 320 series but featured engines made by Rolls-Royce instead of Pratt & Whitney. Military And Special Variants Of The Boeing 707 While the ...

Four Pratt & Whitney TF33-P-5 turbofans with thrust reversers The WC-135 Constant Phoenix is a militarized version of the Boeing 707 commercial airliner which is used to verify compliance of the ...