Why do some rockets make a smooth, continuous “woosh” sound while others make a rougher popping/rumbling sound?
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It depends on the type of engine the rocket has. A continuous feed liquid fuel or solid fuel rocket will produce the “whoosh” sound while a pulse engine (such as in the V1 “Buzz bomb”) will produce a popping or buzz sound.
The pitch of the rocket sound depends on the fuel feed and the size of the nozzle. Larger rockets produce a deeper sound.
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