Cavitational Speeds

Eesocks · 10-21-13, 10:32 AM

On the Flood and Vent Valve indicator in the Command room is a chart showing Cavitational speeds for various depths. Anyone know if this is a good guide for avoiding passive sonar or if it is even modelled in the sim?

ETR3(SS) · 10-21-13, 12:04 PM

Where's that at? I don't recall seeing that anywhere. But doesn't matter much as cavitation isn't modeled in game. As far as passive sonar detection, it's based solely on shaft rpm as far as I can tell.

Bubblehead1980 · 10-21-13, 01:05 PM

Quote:

Originally Posted by Eesocks

On the Flood and Vent Valve indicator in the Command room is a chart showing Cavitational speeds for various depths. Anyone know if this is a good guide for avoiding passive sonar or if it is even modelled in the sim?

Well it's not modeled per se but speed does affect how you are detect, as does your depth. Keep it under 100 RPM's, closer to 50 , you are pretty quiet.Having silent running on will help.Depth plays in as it would at cavitation, example, I have been at 600 feet in a Balao running ahead standard at 6 knots and remained undetected by passive sonar of escorts 1800 yards away because I was deep, no cavitation there(O Kane mentions this in his book CLEAR THE BRIDGE)

Times when I was threading through and escort screen, I may go to 100 or 200 feet depending, silent running 100 rpms maybe more, depending on depth to slip inside the screen to attack.

Eesocks · 10-21-13, 01:32 PM

Quote:

Well it's not modeled per say but speed does affect how you are detect, as does your depth. Keep it under 100 RPM's, closer to 50 , you are pretty quiet.Having silent running on will help.Depth plays in as it would at cavitation, example, I have been at 600 feet in a Balao running ahead standard at 6 knots and remained undetected by passive sonar of escorts 1800 yards away because I was deep, no cavitation there(O Kane mentions this in his book CLEAR THE BRIDGE)

So it seems that it may be worth taking note of.

Quote:

Where's that at?

It's on a metal plate on the indicators port side of command room where all the red and green lights are.
It actually shows RPM at different depths, basically the deeper you are the more RPM's you can have.

Sailor Steve · 10-21-13, 03:22 PM

Quote:

Originally Posted by Bubblehead1980

per say

Per say: No such word or phrase.

Per se: Latin, "in and of itself".

Before you get the wrong idea, Steve the grammar nazi has pointed that out to everyone who has ever misused that phrase on these forums. It's my absolute pet peeve.

fireftr18 · 10-21-13, 06:19 PM

Is that in stock? With or without mods? Which sub, or all of them?

Bubblehead1980 · 10-21-13, 10:52 PM

Quote:

Originally Posted by Sailor Steve

Per say: No such word or phrase.

Per se: Latin, "in and of itself".

Before you get the wrong idea, Steve the grammar nazi has pointed that out to everyone who has ever misused that phrase on these forums. It's my absolute pet peeve.

lol I know better, typing in a hurry happens.Thank you mein fuhrer

Eesocks · 10-22-13, 10:38 AM

Quote:

Is that in stock? With or without mods? Which sub, or all of them?

It is in Sargo class haven't checked in other classes

TMO 2.5
ISE v3 TMO&RBF
1.5 OTC 031312 for TMO 2.5
1.5 OTC 16 to 9 aspect ratio for TMO
1.5 OTC Realistic Scopes for 16 to 9 TMO

Armistead · 10-22-13, 11:08 AM

Could be the interior mod, I think by Vickers that added all the labels to the equipment...

Get a SS of it, still can't get my game loaded as of yet on my new PC, not that I've been trying lately..

Eesocks · 10-22-13, 11:21 AM

Just checked on an old pc and it's not in stock or TMO 2.5 so I'm guessing it's in Improved Stock Enviroment for TMO&RBF but I don't have them on that pc so I can't check. I'm on patrol now but I'll check when I'm in port.

Rammstein0991 · 10-22-13, 01:08 PM

For that matter, noob question possibly but whats the red needle on the depth gauge?

Admiral Halsey · 10-22-13, 02:10 PM

Quote:

Originally Posted by Rammstein0991

For that matter, noob question possibly but whats the red needle on the depth gauge?

If your using the 165 ft depth gauge it's your periscope depth. If you're using the 450 ft depth gauge while running the stock game it's your crush depth and you can't exceed it or you will die. If you're running a mega mod like TMO it's your test depth and you can exceed it but how deep you can go beyond it depends on hull integrity and how much of a risk taker you are.(Though most of the time you'll have to go deeper then you're comfortable with to get the destroyers off you.)

CaptBones · 10-23-13, 09:05 PM

Quote:

Originally Posted by Sailor Steve

Per say: No such word or phrase.

Per se: Latin, "in and of itself".

Before you get the wrong idea, Steve the grammar nazi has pointed that out to everyone who has ever misused that phrase on these forums. It's my absolute pet peeve.

Then I guess "irregardless" is downgraded to a non-absolute pet peeve?

But, you must've gotten Bubblehead's goat by the beard, he didn't waste any time editing that post or sending you his "thank you" note!

Howsomever (can I get an "Amen!" for that one?)...I guess I must not have been very observant WRT this in either SH 3 or 4...I've always assumed (and I know what that means!) "realistic" cavitation speeds were not modeled in the games...er...I mean sims...or maybe I do mean games...what-bloody-ever!

Perhaps I'll give it a go on my next patrol, in each game, to see if I get similar evidence/results as "BH80" experienced. I'm rather sure that I'll find "no joy" in SH3, but I hope it does work semi-realistically in SH4. It'd be a nice variation on the always-workable "take her deep and keep 'em astern" with silent running set...

BigWalleye · 10-23-13, 09:30 PM

Quote:

Originally Posted by Sailor Steve

Per say: No such word or phrase.

Per se: Latin, "in and of itself".

Before you get the wrong idea, Steve the grammar nazi has pointed that out to everyone who has ever misused that phrase on these forums. It's my absolute pet peeve.

Steve, glad to see you're still keeping a taught ship! Anchors away!

Or, as we say in France: Plus saw mime day shows! (I apologize in advance to any Francophone on the forum.)

Eesocks · 10-24-13, 10:59 AM

It seems like the Cavitational Speed plate was added with TMO 2.5 and having checked several different subs,only found it in the Sargo.

10-21-13, 10:32 AM	#1
Eesocks Watch Join Date: Oct 2013 Posts: 24 Downloads: 27 Uploads: 0	Cavitational Speeds On the Flood and Vent Valve indicator in the Command room is a chart showing Cavitational speeds for various depths. Anyone know if this is a good guide for avoiding passive sonar or if it is even modelled in the sim?

10-21-13, 12:04 PM	#2
ETR3(SS) Ocean Warrior Join Date: Dec 2007 Location: Between test depth and periscope depth Posts: 3,021 Downloads: 175 Uploads: 16	Where's that at? I don't recall seeing that anywhere. But doesn't matter much as cavitation isn't modeled in game. As far as passive sonar detection, it's based solely on shaft rpm as far as I can tell. __________________ USS Kentucky SSBN 737 (G) Comms Div 2003-2006 Qualified 19 November 03 Yes I was really on a submarine.

10-21-13, 06:19 PM	#6
fireftr18 Ocean Warrior Join Date: Feb 2010 Location: Kentucky Posts: 2,528 Downloads: 77 Uploads: 0	Is that in stock? With or without mods? Which sub, or all of them? __________________ Of all the forms of Martial Arts, Karaoke causes the most pain!

10-22-13, 11:08 AM	#9
Armistead Rear Admiral Join Date: Dec 2008 Location: on the Dan Posts: 10,880 Downloads: 364 Uploads: 0	Could be the interior mod, I think by Vickers that added all the labels to the equipment... Get a SS of it, still can't get my game loaded as of yet on my new PC, not that I've been trying lately.. __________________ You see my dog don't like people laughing. He gets the crazy idea you're laughing at him. Now if you apologize like I know you're going to, I might convince him that you really didn't mean it.

10-22-13, 11:21 AM	#10
Eesocks Watch Join Date: Oct 2013 Posts: 24 Downloads: 27 Uploads: 0	Just checked on an old pc and it's not in stock or TMO 2.5 so I'm guessing it's in Improved Stock Enviroment for TMO&RBF but I don't have them on that pc so I can't check. I'm on patrol now but I'll check when I'm in port.

10-22-13, 01:08 PM	#11
Rammstein0991 Engineer Join Date: Sep 2013 Location: NC USA Posts: 219 Downloads: 164 Uploads: 0	For that matter, noob question possibly but whats the red needle on the depth gauge?

10-24-13, 10:59 AM	#15
Eesocks Watch Join Date: Oct 2013 Posts: 24 Downloads: 27 Uploads: 0	It seems like the Cavitational Speed plate was added with TMO 2.5 and having checked several different subs,only found it in the Sargo.