I often hear that German bombers made a different sound to British aircraft during the blitz, my mum and others tell me the German planes made a woo woo woo sound while the British aircraft made more of a roar. Going by the amount of accounts and witnesses there seems little doubt that German aircraft actually did make this sound and I have heard a number of explanations of why this happened which include the following.
1) That the sound was caused by a large number of aircraft in formation that had engines running at different rpm's.
2) That twin engine German aircraft had each engine set at a different rpm to either frighten civilians, confuse radar or because the engines were tired and could not be synchronised correctly.
3) That the pilots themselves de-synchronised the engines while in flight to confuse the anti aircraft defences.
I would have thought that de-synchronised engines would have been a bad thing for both crew and aircraft.
1) That the sound was caused by a large number of aircraft in formation that had engines running at different rpm's.
2) That twin engine German aircraft had each engine set at a different rpm to either frighten civilians, confuse radar or because the engines were tired and could not be synchronised correctly.
3) That the pilots themselves de-synchronised the engines while in flight to confuse the anti aircraft defences.
I would have thought that de-synchronised engines would have been a bad thing for both crew and aircraft.