Passive Torpedo Problems

SeaQueen · 07-10-06, 08:36 PM

Sort of a related question...

Has anyone noticed if torpedoes are more quiet when you shoot them at less than full speed?

Fish · 07-11-06, 04:17 AM

Quote:

Originally Posted by SeaQueen

Sort of a related question...

Has anyone noticed if torpedoes are more quiet when you shoot them at less than full speed?

I launched a torp at 35 and a litle later one at 55, when they are equal at range I saw no different .
I used the LWAMI mod.

LuftWolf · 07-11-06, 07:33 PM

In the stock game, there is no difference in sound vs. speed other than cavitation (+10PSL or about 15dB).

In LWAMI torpedoes have an addtional +10PSL when traveling at full speed, scaled linearly down to +0 at 0 kts, as well as the +10PSL when cavitating.

Cheers,
David

Phullbrick · 07-12-06, 05:56 AM

any idea of the best speed to use for a passive torpedo to reduce the washout effect on the torpedo sensor ?

Amizaur · 07-12-06, 01:01 PM

In game currently - under 46kts. But I don't like this value and it should be lowered. Realistically - 40kts or below for passives.

Phullbrick · 07-12-06, 03:13 PM

dziekuje Amizaur

I'll try to get some info from "real world" if possible

Fish · 07-12-06, 04:07 PM

Quote:

Originally Posted by LuftWolf

In the stock game, there is no difference in sound vs. speed other than cavitation (+10PSL or about 15dB).

In LWAMI torpedoes have an addtional +10PSL when traveling at full speed, scaled linearly down to +0 at 0 kts, as well as the +10PSL when cavitating.

Cheers,
David

LW, I wonder it should be liniar? Just a feeling but shouldn't the noise not rapidly increase at higher speed?

Qppralke · 07-12-06, 10:31 PM

BTW. I remember you could launch torpedo , deep enough to not cause "Torpedo in the Water" on other players boat. Anyone remember how deep it has to be ?

goldorak · 07-12-06, 11:14 PM

Quote:

Originally Posted by Tusipex

BTW. I remember you could launch torpedo , deep enough to not cause "Torpedo in the Water" on other players boat. Anyone remember how deep it has to be ?

I think that only applies to the uuv. :hmm:

Fish · 07-13-06, 05:54 AM

Quote:

Originally Posted by Tusipex

BTW. I remember you could launch torpedo , deep enough to not cause "Torpedo in the Water" on other players boat. Anyone remember how deep it has to be ?

Depends on layer strength and distance.

LuftWolf · 07-13-06, 01:04 AM

Quote:

Originally Posted by Fish

Quote:

Originally Posted by LuftWolf

In the stock game, there is no difference in sound vs. speed other than cavitation (+10PSL or about 15dB).

In LWAMI torpedoes have an addtional +10PSL when traveling at full speed, scaled linearly down to +0 at 0 kts, as well as the +10PSL when cavitating.

Cheers,
David

LW, I wonder it should be liniar? Just a feeling but shouldn't the noise not rapidly increase at higher speed?

Well, that's the way it has to be done because of the way the engine works. We have taken care to calculate the base PSL values accordingly.

It's really not THAT big a deal, because the cavitation profiles for the torpedoes are good enough that slow torpedoes make much less noise than fast torpedoes because they don't cavitate except if at very shallow depths.

So, for all practical purposes, in terms of in game performance, it is exactly as you describe, Fish.

Cheers,
David

Nexus7 · 07-15-06, 02:10 AM

Quote:

Originally Posted by LuftWolf

In the stock game, there is no difference in sound vs. speed other than cavitation (+10PSL or about 15dB).

That applies only for torpedoes right? Because for the subs i notice signal strength changes when a Seawolf makes i.e. 3 knots, 8 knots or 15 knots. I am using the stock game

Qppralke · 07-15-06, 02:20 AM

Is it really dependant on the layer ?
Goldorak , yes you are right . . . do you remember how deep it is ?

goldorak · 07-15-06, 07:53 AM

Quote:

Originally Posted by Tusipex

Is it really dependant on the layer ?
Goldorak , yes you are right . . . do you remember how deep it is ?

Oh my, i really don't remember since i seldom use the uuv.

LuftWolf · 07-15-06, 11:03 AM

@Tusiplex Yes, the TIW message does indeed depend on layer and TIW signal strength. If none of your sensors have a acoustic signature on the torpedo (that is, if they haven't detected the torpedo), you will not get a TIW message until you do have a acoustic track on the torpedo (as it should be). I've crossed layers and gotten TIW message for torpedoes that are quite close and fired some time ago.

Quote:

Originally Posted by Nexus7

Quote:

Originally Posted by LuftWolf

In the stock game, there is no difference in sound vs. speed other than cavitation (+10PSL or about 15dB).

That applies only for torpedoes right? Because for the subs i notice signal strength changes when a Seawolf makes i.e. 3 knots, 8 knots or 15 knots. I am using the stock game

In the stock game, there is no sound vs. speed for torpedoes, nukes get a +10PSL at top speed, and diesels get a +5PSL.

Cheers,
David

07-11-06, 07:33 PM	#3
LuftWolf Ocean Warrior Join Date: May 2005 Location: Free New York Posts: 3,167 Downloads: 2 Uploads: 0	In the stock game, there is no difference in sound vs. speed other than cavitation (+10PSL or about 15dB). In LWAMI torpedoes have an addtional +10PSL when traveling at full speed, scaled linearly down to +0 at 0 kts, as well as the +10PSL when cavitating. Cheers, David __________________ LW

07-12-06, 05:56 AM	#4
Phullbrick Seaman Join Date: Mar 2002 Location: France Posts: 42 Downloads: 9 Uploads: 0	any idea of the best speed to use for a passive torpedo to reduce the washout effect on the torpedo sensor ? __________________

07-12-06, 03:13 PM	#6
Phullbrick Seaman Join Date: Mar 2002 Location: France Posts: 42 Downloads: 9 Uploads: 0	dziekuje Amizaur I'll try to get some info from "real world" if possible __________________

07-12-06, 10:31 PM	#8
Qppralke A-ganger Join Date: Jan 2002 Location: from Poland , in Wales . . Posts: 72 Downloads: 0 Uploads: 0	BTW. I remember you could launch torpedo , deep enough to not cause "Torpedo in the Water" on other players boat. Anyone remember how deep it has to be ? __________________ Last edited by Qppralke; 07-12-06 at 10:35 PM.

07-15-06, 02:20 AM	#13
Qppralke A-ganger Join Date: Jan 2002 Location: from Poland , in Wales . . Posts: 72 Downloads: 0 Uploads: 0	Is it really dependant on the layer ? Goldorak , yes you are right . . . do you remember how deep it is ? __________________

07-10-06, 08:36 PM	#1
SeaQueen Naval Royalty Join Date: Jun 2005 Location: Washington, DC Posts: 1,185 Downloads: 0 Uploads: 0	Sort of a related question... Has anyone noticed if torpedoes are more quiet when you shoot them at less than full speed?

07-12-06, 01:01 PM	#5
Amizaur Sonar Guy Join Date: Nov 2002 Location: Poland Posts: 398 Downloads: 0 Uploads: 0	In game currently - under 46kts. But I don't like this value and it should be lowered. Realistically - 40kts or below for passives.