Can DDs hear torpedo launch transients?

Keelbuster · 04-29-06, 07:10 PM

This must be an old question. But I want to ask it again:

Can DDs hear torpedo doors opening, closing, compressed air sounds during the torpedo launch? I've often wonder when I'm in a tight situation (like in the center of a TF) whether I should wait to be in escorts baffles to open the torpedo doors. Can this be heard? What about in multiplayer? Can you hear the other sub open it's doors? I know you can hear torpedoes (they sound wicked) but I don't know about the transients, or whether DDs are modeled to detect them.

Kb

BettingUrlife · 04-30-06, 04:27 AM

I have no proof about this, but it seems that escorts can't hear you, nor can they hear torpedoes. Occasionally to have my way with a weakly guarded convoy early in the war, I will destroy the escort then wreak havoc on the merchants. Not once has an escort started evasive action. The only time they do something is in daylight hours and they see the torpedo's wake.

Keelbuster · 04-30-06, 11:39 AM

Yea - I think so too. It's a shame though - torpedoes are LOUD. When you're sitting there silently, and you launch a salvo, every DD in the area should freak out, that is if they're listening. I'll have to try in multiplayer to see if you can hear torpedo doors opening/firing noises over the hydrophone.

Also, I wonder about the compressed air sounds when you blow ballast?

Part of the reason I'm asking is that I'm wondering about the possibility of deathmatch in multiplay. Trying to track submerged contacts with the hydrophone+periscope,and estimating their course, and firing a salvo. Might be impossible, but I watched U-571 a couple weeks ago and am now really into the possibility WW2 sub-v-sub combat.

Kb

Manock · 04-30-06, 02:04 PM

I was just thinking about this last night. Getting ready to take on some convoys for the first time, & wondering if I need to take along some Fat course changing torpedoes.

Apparently not. If ships dont react to your torpedoes, they wont be dodging, & you can go for the straight shot.

Disappointing. Usually when an issue is not modded, Ill just pretend it is, and conduct the sim as if it is.

But not thinking of a way to pretend ships are evading unless wait a minute.

Could fire one torpedo into the convoy. Let it hit, then when convoy evades fire the Fats!

Damn, Im good. Gotta give this a try. Will report later.

Manock

joea · 04-30-06, 02:05 PM

U-571?

No sub vs. sub combat occured in WWII, well a dozen or so u-boats were ambushed on the surface by mostly RN subs which were submerged. I suspect WWII hydrophones were not able to pick up transients. Modern subcombat is like the space shuttle vs. Lindberg.

joea · 04-30-06, 02:06 PM

Oh and FATS were not designed to try to hit evading ships but as allied sensors got better u-boats had to attack from greater distances so this gave more of a chance to hit something in a large convoy, IIRC.

Keelbuster · 04-30-06, 02:15 PM

But they are also good for hitting evading ships....

long distance = course & speed uncertainty
evasion = course & speed uncertainty

Right?

Kb

Keelbuster · 04-30-06, 02:16 PM

Quote:

Originally Posted by joea

U-571?

No sub vs. sub combat occured in WWII, well a dozen or so u-boats were ambushed on the surface by mostly RN subs which were submerged. I suspect WWII hydrophones were not able to pick up transients. Modern subcombat is like the space shuttle vs. Lindberg.

Hmmm - yea - determining course and speed with the hydrophone would be very difficult. I still want to know if its possible. Historical faithfulness aside, multiplayer death match could be cool right?

Kb

Manock · 04-30-06, 02:25 PM

I agree Fats were to aid long range shots but disagree on your why. Type I steam torpedoes coupled with uboat optics & computer were quite capable of hitting a merchant at its maximum range of 12.5 km. Have done so in this sim on unescorted merchants.

But by mid war, even the greenest of destroyers would have heard there long run time, and radioed for evasive maneuvers.

Hence Fats were invented. Though it appears they werent to effective as uboats stopped carrying the Fats later in the war.

NeonSamurai · 04-30-06, 02:46 PM

Multiplayer deathmatch is virtualy impossible to do with ww2 submarines, both players know the other is there, trying to build up enough data to fire of a shot is impossible, plus subs can move in 3 dimensions and it would be very easy for a torpedo to be set at the wrong depth. Even accoustic torpedos will stick to their set depth precicely so that they dont accidentaly home in on the firing sub (which typicaly dives right after firing).

So good luck

04-29-06, 07:10 PM	#1
Keelbuster Ace of the Deep Join Date: Oct 2005 Location: BA 72 Posts: 1,092 Downloads: 43 Uploads: 0	Can DDs hear torpedo launch transients? This must be an old question. But I want to ask it again: Can DDs hear torpedo doors opening, closing, compressed air sounds during the torpedo launch? I've often wonder when I'm in a tight situation (like in the center of a TF) whether I should wait to be in escorts baffles to open the torpedo doors. Can this be heard? What about in multiplayer? Can you hear the other sub open it's doors? I know you can hear torpedoes (they sound wicked) but I don't know about the transients, or whether DDs are modeled to detect them. Kb __________________

04-30-06, 11:39 AM	#3
Keelbuster Ace of the Deep Join Date: Oct 2005 Location: BA 72 Posts: 1,092 Downloads: 43 Uploads: 0	Yea - I think so too. It's a shame though - torpedoes are LOUD. When you're sitting there silently, and you launch a salvo, every DD in the area should freak out, that is if they're listening. I'll have to try in multiplayer to see if you can hear torpedo doors opening/firing noises over the hydrophone. Also, I wonder about the compressed air sounds when you blow ballast? Part of the reason I'm asking is that I'm wondering about the possibility of deathmatch in multiplay. Trying to track submerged contacts with the hydrophone+periscope,and estimating their course, and firing a salvo. Might be impossible, but I watched U-571 a couple weeks ago and am now really into the possibility WW2 sub-v-sub combat. Kb __________________

04-30-06, 02:04 PM	#4
Manock Bosun Join Date: Jul 2002 Posts: 68 Downloads: 0 Uploads: 0	Too Bad I was just thinking about this last night. Getting ready to take on some convoys for the first time, & wondering if I need to take along some Fat course changing torpedoes. Apparently not. If ships dont react to your torpedoes, they wont be dodging, & you can go for the straight shot. Disappointing. Usually when an issue is not modded, Ill just pretend it is, and conduct the sim as if it is. But not thinking of a way to pretend ships are evading unless wait a minute. Could fire one torpedo into the convoy. Let it hit, then when convoy evades fire the Fats! Damn, Im good. Gotta give this a try. Will report later. Manock

04-30-06, 02:15 PM	#7
Keelbuster Ace of the Deep Join Date: Oct 2005 Location: BA 72 Posts: 1,092 Downloads: 43 Uploads: 0	But they are also good for hitting evading ships.... long distance = course & speed uncertainty evasion = course & speed uncertainty Right? Kb __________________

04-30-06, 02:25 PM	#9
Manock Bosun Join Date: Jul 2002 Posts: 68 Downloads: 0 Uploads: 0	Disagree I agree Fats were to aid long range shots but disagree on your why. Type I steam torpedoes coupled with uboat optics & computer were quite capable of hitting a merchant at its maximum range of 12.5 km. Have done so in this sim on unescorted merchants. But by mid war, even the greenest of destroyers would have heard there long run time, and radioed for evasive maneuvers. Hence Fats were invented. Though it appears they werent to effective as uboats stopped carrying the Fats later in the war.

04-30-06, 04:27 AM	#2
BettingUrlife Machinist's Mate Join Date: Apr 2005 Location: AM56 North Atlantic Posts: 128 Downloads: 2 Uploads: 0	I have no proof about this, but it seems that escorts can't hear you, nor can they hear torpedoes. Occasionally to have my way with a weakly guarded convoy early in the war, I will destroy the escort then wreak havoc on the merchants. Not once has an escort started evasive action. The only time they do something is in daylight hours and they see the torpedo's wake.

04-30-06, 02:05 PM	#5
joea Silent Hunter Join Date: Jul 2002 Location: At periscope depth in Lake Geneva Posts: 3,512 Downloads: 25 Uploads: 0	U-571? No sub vs. sub combat occured in WWII, well a dozen or so u-boats were ambushed on the surface by mostly RN subs which were submerged. I suspect WWII hydrophones were not able to pick up transients. Modern subcombat is like the space shuttle vs. Lindberg.

04-30-06, 02:06 PM	#6
joea Silent Hunter Join Date: Jul 2002 Location: At periscope depth in Lake Geneva Posts: 3,512 Downloads: 25 Uploads: 0	Oh and FATS were not designed to try to hit evading ships but as allied sensors got better u-boats had to attack from greater distances so this gave more of a chance to hit something in a large convoy, IIRC.

04-30-06, 02:46 PM	#10
NeonSamurai Ocean Warrior Join Date: Jan 2002 Location: Socialist Republic of Kanadia Posts: 3,044 Downloads: 25 Uploads: 0	Multiplayer deathmatch is virtualy impossible to do with ww2 submarines, both players know the other is there, trying to build up enough data to fire of a shot is impossible, plus subs can move in 3 dimensions and it would be very easy for a torpedo to be set at the wrong depth. Even accoustic torpedos will stick to their set depth precicely so that they dont accidentaly home in on the firing sub (which typicaly dives right after firing). So good luck __________________ SH3 Newbie Guide Links and other helpfull stuff