When I run aircraft on my layouts I get this rattle sound together with the aircraft engine (and shipping) sound. While I realise that the rattle sound is most likely to represent the sound of the train rolling stock (which I don't mind) it is not appropriate for aircraft. I can't find this sound in the config file for the aircraft. Can anyone tell me how I can get rid of this sound for aircraft? Where is this rattle (or is it clickety-clack) sound located? Is it part of the track make-up? Many thanks. Norm.