Originally Posted by
galaxy flyer
When Boeing designed the Trimotor, it was a Whisperjet, as nicknamed by EAL. The straight pipe 707 and DC-8, with water going, made the 727 sound like today's fanjets. The C-series is just about inaudible on take-off, btw.
GF
I thought it had more to do with engine location. Nothing to do with outside noise. Since the engines were aft located the roar was not as audible inside the aircraft. But outside, well we have all heard them. I grew up on the approach end of runway 18 at Carswell AFB. At the time the largest strategic B-52 base in the country. I know what 8 straight pipe J-57 water injected engines sound like. Yes, your right, makes the 727 sound like a CRJ.