They weren’t the most powerful …. but …. were certainly among
“the noisiest” aircraft engines at T/O …. and they powered some of
the best of British civil aviation developed during the 1960’s.
They’re gone now from both UK and European skies, but, their sound
echos on within the memory of those whom recall them …. and having
ever heard them once (especially those living close to airport
perimeters) who could possibly ever forget them.
They were “the little British engine that could” …. the RR SPEY
turbofan …. and it powered