I read on the German Wikipedia that cruiser Blücher entered the Oslofjord at a low speed with the purpose to avoid detection. This brings me to the question: does a battle ship produce significantly more noise when it drives faster?
>>30100715
Does your car make more noise when you floor it?
No they do not. I would guess that it had some thing to do with their smoke from their smoke stack or their timing to avoid patrols and get a gap between them
>>30100739
The way ship engines work they make less sound when the engine is in the operational range. Too fast and and it will sound like a car bouncing the rev limiter and too slow and the piston cycles will be so slow that they each make a vibration that carries pretty far like an unmuffled compression brake in a big truck like a dump truck or a 18 wheeler
>>30100773
>pistons
>battleship
You know you have to be 18 on this site, right
>>30101039
are you dense?
>>30101039
>battleship
>cruiser Blücher
>>30100715
I suppose the 6 foot breakers on the shore line if it entered at speed wouldn't have caught anyones attention
>>30101044
A ship that large uses fuel oil fired turbines.
Also the answer is yes, capitation is a thing.
>Blücher
*sound of horse whinny*
Blücher was supposed to reach oslo at a given time, + when you speed up too much your bow stern wave will get huge, which are quite visible
>>30101879
What knockers!
>>30103740
roll roll roll in the hay
>>30102435
Blucher was also trying to bluff its way in, the captain figured that it was more likely to work if they werent going full speed.
Almost worked too.
>>30100715
Short answer, yes.
After a certain point the propeller starts to create cavetation, i.e. bubbles, which is really noisy to sonar.
