Real Submarine Technology & History Q&A - Page 43

Aktungbby · 09-15-14, 01:13 PM

Quote:

Originally Posted by nionios

Thank you both for the full response.

A footnote to that as the Pampanito is in San Francisco and still one of my favorite destinations...right behind the Liberty Ship Jeremiah O'Brien. "Of the 1,318 POWs on the Rakuyo Maru sunk by Sealion, 159 had been rescued by the four submarines: 73 on Pampanito, 54 on Sealion, and the 32 found by Queenfish and Barb. It was later learned that the Imperial Japanese had rescued 136 for a total of 295 survivors. Of the 900 POWs on the Kachidoki Maru sunk by Pampanito, 656 were rescued by the Imperial Japanese and taken to prison camps in Japan. Over 500 of these men were released by American troops in August, 1945 at the close of the war." http://www.maritime.org/pamphist/patrol3.htm

USS Pampanito on a clear day.... by San Francisco standards!

Threadfin · 09-15-14, 01:17 PM

I don't recall any instances of being surfaced without lookouts posted, perhaps it happened. But I think even if the prospect of being attacked in foul weather were nil, the possibility of collision remained.

If the weather was very bad, such as a typhoon, and he was concerned for the safety of the lookouts or of them being washed overboard, the skipper would choose to run submerged below the rough water as much as possible.

Aktungbby · 09-15-14, 02:27 PM

On one U-boat the crew were horrified to discover the lookouts washed over board in Heavy seas In effect the boat had been defenseless without any protection U-106 10/23/1941: A tragic event occurred on U-106 on this date in heavy weather. When the replacement watch opened the conning tower hatch they found that all four men of the previous watch had been lost overboard. [Oberleutnant zur See Werner Grüneberg, Fähnrich zur See Herbert von Bruchhausen, Oberbootsmannmaat Karl Heemann, Matrose Ewald Brühl]

svt94 · 10-18-14, 02:08 AM

Sorry if this has been asked before, as i new here. And my grammar sucks.

I keep running into an issue (or maybe not)? Under heavy seas my Fleetboat seems to punch and kinda teater over the waves on the center? sorry kinda hard to explain, i guess. Wish i could post a picture. My net sucks donkey butt. haha.

So my question is: did they punch through the waves kinda like a bullet and teater (SP??) throwing props out of the water, or did they ride the high surf like a larger vessel?

Again. Im sorry. i can't spell or write for the life of me.
Or maybe it is Pabst's? lol Thanks in regards

TorpX · 10-21-14, 01:25 AM

In real-life, I think most submarines cut through the waves, instead of riding over them. I believe this is due to their low reserve buoyancy (meaning they are almost heavy enough to sink). However, props did come out of the water at times, and reduce speed. The S-class were known to have poor sea-keeping characteristics, for example.

Don't expect too much from the game. I've noticed the same thing about the waves; the water will push up under the sub, and cause it teeter atop the wave, until it slides off. There have been attempts made to make the waves/effects more realistic, but there are limits to what can be done.

ikalugin · 10-21-14, 01:38 AM

What is a normal buoyancy reserve for a surfaced (ww2 era as I assume that this thread is dedicated solely to them) submarine?

TorpX · 10-21-14, 11:58 PM

I think it was in the neighborhood of 30%. I believe the S-class would be around 15% and the Narwhals would be over 30, I guess.

Jolierouge · 01-14-15, 02:05 AM

The game says "Firing tube x", but how can a Torpedo be "fired"?
Firing something would Need an explosive combustion as far as I am concerned.

Is this the real term used or some dev-thing?

So why not "Launching tube x"?

greetings

Jolie

Leandros · 01-14-15, 03:51 AM

Quote:

Originally Posted by Jolierouge

The game says "Firing tube x", but how can a Torpedo be "fired"?
Firing something would Need an explosive combustion as far as I am concerned.

Is this the real term used or some dev-thing?

So why not "Launching tube x"?

greetings

Jolie

Since you're on it - how can the "tube" be launched (or fired)? The tube is fixed in the boat - the holder (container) of the torpedo. Would not "fire" (or launch) the "torpedo" be the correct term?

Can an "explosion" of compressed air justify the word "fire"?

Fred

Sailor Steve · 01-14-15, 09:57 AM

Technically speaking "fire" refers to putting a match to the primer pan, so even a gun isn't really "fired". The Germans use "Los" ("Loose") when launching a torpedo.

American doctrine on the subject is that the torpedo tube is a "gun" and the torpedo a "bullet", and is therefore "fired".
http://maritime.org/doc/fleetsub/tubes/chap1.htm

Jolierouge · 01-15-15, 02:05 AM

Ahhhh.......then this is a certain-point-of-view-thing!

Explains a lot.

Okay, thanks....greetings

Jolie

ssjtoma · 03-19-15, 11:41 PM

I was always intrigued by the mission to sink the Japanese carrier Shinano!!! It was always a good read!!!!

wutzthedeal · 04-15-15, 09:15 AM

This video could be the real life tutorial for SH4!

DeimosFormido · 09-21-15, 12:28 AM

I've always wondered: what is the purpose of the horizontal steel structure protruding from subs at the aft end?

(that thing on the right, horizontal structure made of metal bars)

ColonelSandersLite · 09-21-15, 12:46 AM

Quote:

Originally Posted by wutzthedeal

This video could be the real life tutorial for SH4!

I've seen this before but I just now noticed something. At about 2:00 even, there is footage of a ship getting torpedoed. The explosion is on the opposite side of the ship though, so probably a magnetic influence detonation. I don't think I've ever seen footage of that before, or at least never noticed it.

09-15-14, 01:17 PM	#632
Threadfin Ace of the Deep Join Date: Feb 2006 Posts: 1,070 Downloads: 38 Uploads: 0	I don't recall any instances of being surfaced without lookouts posted, perhaps it happened. But I think even if the prospect of being attacked in foul weather were nil, the possibility of collision remained. If the weather was very bad, such as a typhoon, and he was concerned for the safety of the lookouts or of them being washed overboard, the skipper would choose to run submerged below the rough water as much as possible. __________________ What? Behind the rabbit?

09-15-14, 02:27 PM	#633
Aktungbby Gefallen Engel U-666 Join Date: Jul 2013 Location: On a tilted, overheated, overpopulated spinning mudball on Collision course with Andromeda Galaxy Posts: 27,823 Downloads: 22 Uploads: 0	On one U-boat the crew were horrified to discover the lookouts washed over board in Heavy seas In effect the boat had been defenseless without any protection U-106 10/23/1941: A tragic event occurred on U-106 on this date in heavy weather. When the replacement watch opened the conning tower hatch they found that *all* four men of the previous watch had been lost overboard. [Oberleutnant zur See Werner Grüneberg, Fähnrich zur See Herbert von Bruchhausen, Oberbootsmannmaat Karl Heemann, Matrose Ewald Brühl] __________________ "Only two things are infinite; The Universe and human squirrelyness; and I'm not too sure about the Universe"

10-21-14, 01:25 AM	#635
TorpX Silent Hunter Join Date: Sep 2010 Posts: 3,975 Downloads: 153 Uploads: 11	In real-life, I think most submarines cut through the waves, instead of riding over them. I believe this is due to their low reserve buoyancy (meaning they are almost heavy enough to sink). However, props did come out of the water at times, and reduce speed. The S-class were known to have poor sea-keeping characteristics, for example. Don't expect too much from the game. I've noticed the same thing about the waves; the water will push up under the sub, and cause it teeter atop the wave, until it slides off. There have been attempts made to make the waves/effects more realistic, but there are limits to what can be done.

01-14-15, 09:57 AM	#640
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	Technically speaking "fire" refers to putting a match to the primer pan, so even a gun isn't really "fired". The Germans use "Los" ("Loose") when launching a torpedo. American doctrine on the subject is that the torpedo tube is a "gun" and the torpedo a "bullet", and is therefore "fired". http://maritime.org/doc/fleetsub/tubes/chap1.htm __________________ “Never do anything you can't take back.” —Rocky Russo

04-15-15, 09:15 AM	#643
wutzthedeal Swabbie Join Date: Dec 2014 Posts: 13 Downloads: 9 Uploads: 0	Absolute must-watch video This video could be the real life tutorial for SH4! __________________ Ex. USAF, in the Navy now. Running GFO.

10-18-14, 02:08 AM	#634
svt94 Swabbie Join Date: Sep 2014 Posts: 11 Downloads: 16 Uploads: 0	Sorry if this has been asked before, as i new here. And my grammar sucks. I keep running into an issue (or maybe not)? Under heavy seas my Fleetboat seems to punch and kinda teater over the waves on the center? sorry kinda hard to explain, i guess. Wish i could post a picture. My net sucks donkey butt. haha. So my question is: did they punch through the waves kinda like a bullet and teater (SP??) throwing props out of the water, or did they ride the high surf like a larger vessel? Again. Im sorry. i can't spell or write for the life of me. Or maybe it is Pabst's? lol Thanks in regards

10-21-14, 01:38 AM	#636
ikalugin Ocean Warrior Join Date: Aug 2014 Location: Moscow, Russia Posts: 3,212 Downloads: 8 Uploads: 0	What is a normal buoyancy reserve for a surfaced (ww2 era as I assume that this thread is dedicated solely to them) submarine?

10-21-14, 11:58 PM	#637
TorpX Silent Hunter Join Date: Sep 2010 Posts: 3,975 Downloads: 153 Uploads: 11	I think it was in the neighborhood of 30%. I believe the S-class would be around 15% and the Narwhals would be over 30, I guess.

01-14-15, 02:05 AM	#638
Jolierouge Sailor man Join Date: Dec 2014 Posts: 45 Downloads: 16 Uploads: 0	The game says "Firing tube x", but how can a Torpedo be "fired"? Firing something would Need an explosive combustion as far as I am concerned. Is this the real term used or some dev-thing? So why not "Launching tube x"? greetings Jolie

01-15-15, 02:05 AM	#641
Jolierouge Sailor man Join Date: Dec 2014 Posts: 45 Downloads: 16 Uploads: 0	Ahhhh.......then this is a certain-point-of-view-thing! Explains a lot. Okay, thanks....greetings Jolie

03-19-15, 11:41 PM	#642
ssjtoma Watch Join Date: Feb 2015 Location: Arizona Posts: 22 Downloads: 12 Uploads: 0	I was always intrigued by the mission to sink the Japanese carrier Shinano!!! It was always a good read!!!!

09-21-15, 12:28 AM	#644
DeimosFormido Swabbie Join Date: Dec 2011 Posts: 5 Downloads: 24 Uploads: 0	I've always wondered: what is the purpose of the horizontal steel structure protruding from subs at the aft end? (that thing on the right, horizontal structure made of metal bars)