Posting as SLF here, when I flew to London (various) in the 70's, I was always struck by the difference in takeoff noise between the Trident and a 1-11. I tended to sit up the back (given a choice) 3 or 4 times a month and this thread has brought back some memories. After getting airborne of course the noise subsided... Thank you for explaining it to me - I'm humbled to realise some of the posters here must have flown me there and back (from Turnhouse - old terminal!)
