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Originally posted by ROBL240
Thinking about it, im in North Derbyshire myself and I remember hearing something loud. Almost like a B52 or B1B was cruising overhead. And thinking to myself "Thats one loud large Jet up there." But thats all I dismissed it as.
I live on the flightpath which takes many of the "Heavies" out over the N.Atlantic, and on numerous occasions theres been Military gear flying at around FL230 which have literally been so loud you can barely hear yourself think for a time. These are louder than Commercial Jets and the transition phase across the Horizon lasts much longer than normal airliners, wether its due to a higher altitude or slower airspeed. Unfortunately they only pass at Night so I cant see what it is.