heavy Turbo prop
Always impressed by this sections ability to answer obscure questions let me ask this
1140 Today approx loud heavy Turbo prop noise( lovely sort of grinding growl) and causing gentle window vibrations passing over Camberley area SW of LHR. Sounded like heading North or North North east but I missed it through the cloud breaks. Outbound from Farnborough ? seemed a bit high for that as best i could judge. Just curiouswhat made me stop and look up( vainly) .Any offers
Thanks
PB