posted on Jun, 13 2012 @ 10:41 PM
Originally posted by Submarines
Originally posted by CALGARIAN
Originally posted by SUICIDEHK45
reply to post by getreadyalready
I think they just got 4 new diesel subs in 2010 or 2011?
Wont hear those coming, nope..
Not sure if you were being sarcastic or not, but...... there is NOTHING quieter than a Diesel boat running on the batteries. You don't even get a
sound signature until they are really close.
The nukes, on the other hand you can hear the reactor noise before anything else. It is normally mistaken for a rain squall.
The art of true quiet is in the propellers. Even a diesel sub on batteries has to run a motor/generator, pumps and auxilliary systems that generate
discrete frequencies, which given the right equipment, can be detected.
The props on the other hand, need to be modal fine-tuned to produce the lowest cavitation possible and not cause any wobble that would produce a
frequency in the water. This is true of all types of submarines. As good as the state of the art is today in producing these kinds of propellers,
there is still not one that is absolutely quiet, and does not have some minute modal characteristics that prevent detection.
edit on 13-6-2012 by charlyv because: spelling , where caught
edit on 13-6-2012 by charlyv because: (no reason given)