This pdf I've put together may be of some interest to you guys! There are a scant few wartime recordings of Typhoons or Tempests and there are only a few which have been digitised and can be found on the web. I've collated links to all of them into one file which I hope may sate any interest you have in this interesting sound which is (currently) lost to time. It sounds most assuredly nothing like any other aero-engine. Also included are links to period recordings of Spitfires on operations in Europe - hearing the familiar note of the Merlin between bursts of Hispano cannon fire isn't half eerie...
View attachment Sabre_Recordings.pdf
View attachment Sabre_Recordings.pdf