[WIP] Japanese Campaign - Page 62

PL_Andrev · 11-10-10, 01:42 PM

What is difference between classical torpedo and kaiten type?

Bubblehead1980 · 11-10-10, 01:57 PM

Kaitens were human torpedos, literally.They were torpedos with a compartment for a "pilot" So the fish was launched and the pilot could steer the torpedo to the targets.Crazy the Japanese were

Hitman · 11-10-10, 02:22 PM

Quote:

I just received "Sunk, the story of the Japanese Submarine Fleet 1941-1945" by Mochitsura Hashimoto, First Edition 1954. There are very few pictures in this book but one caught my attention : the commander at the periscope

this is a very rare picture !!!!

Interesting! Does he describe in the book how the japanese set up their attacks? How they estimated range, AOB, and such? Would be interesting to know

keltos01 · 11-11-10, 11:24 AM

Quote:

Originally Posted by Hitman

Interesting! Does he describe in the book how the japanese set up their attacks? How they estimated range, AOB, and such? Would be interesting to know

looking into it !

already read that I-25, when coming back from the west coast, sank teh russian submarine L-26 which at the time was travelling in pair with L-25 at a range of 500 m !

Hashimoto states that the firing of torpedoes at a greater range than 800 m has poor accuracy

keltos

keltos01 · 11-12-10, 08:11 AM

he talks about getting set up to fire at green 45..

see also the sniking of the Indianapolis :

http://www.history.navy.mil/faqs/faq30-8.htm

USN mission to japan 1946 : IJN TDC analysis

http://www.fischer-tropsch.org/prima...ort%20O-32.pdf

keltos

keltos01 · 11-12-10, 09:34 AM

from sunk !

"It was necessary to know range, course and speed of the target in order to aim and obtain a hit - for the most part the captain at the periscope had to make the necessary estimate.

If the class of ship were known its speed, of course, could be deduced by counting the engine revolutions with the hydrophones. In the case of a merchant ship one could get the course and speed by following up astern, obtaining the range by radar...

...

The expected range at the time of firing - two thousand yards - and the bearing - green fourty five degrees - were set.

...

the favorable moment for firing was approaching. I altered the setting on the director to green sixty degrees, range fifteen hundred yards, and began the approach for firing.

At last, in a loud voice, I gave the order, "Stand-by - Fire !" The torpedo switch pressed at intervals of two seconds and then the report came from the torpedo room, "All tubes fired and correct"

siw torpedoes were speeding, fanwise, towards the enemy ship.

...

the ship we had sunk turned out to be the Indianapolis."

Hashimoto, Sunk !, 1954, pp 222-225.

from I-Boat Captain :

"I tried to judge their speed from the bowwave each was making and called out," Target speed is 26 knots ! there are two ships in sight !"

then I began to call out ranges and bearings.
"bearing Mark !" I cried out, and lieutenant Kondo answered "Set !"

the angle between the destroyers' bow and the line of sight between him and me was 40 degrees, right. Range was 600 yards.

p 163.

keltos01 · 11-12-10, 12:00 PM

south africa.

I am being harrassed by a DD and an Elco Torpedo Boat. I fired a torp at the torpedo boat which hit the DD

but I was wondering : shouldn't the Elcos be armed with at least a couple depth charges ??

from my readings they were a major pain in the butt to the IJN I-Boats, and this by no small measure since a torp would go underneath them without exploding !

I also read they used to make torpedo attacks and then drop DC on IJN subs.

can we add DC to them ?

keltos

PL_Andrev · 11-12-10, 12:24 PM

Quote:

Originally Posted by Bubblehead1980

Kaitens were human torpedos, literally.They were torpedos with a compartment for a "pilot" So the fish was launched and the pilot could steer the torpedo to the targets.Crazy the Japanese were

Sorry, wrong question.
What is difference between classical torpedo and kaiten type in this mod?

keltos01 · 11-12-10, 12:28 PM

Quote:

Originally Posted by Antar

Sorry, wrong question.
What is difference between classical torpedo and kaiten type in this mod?

all torpedoes have their RL characteristics.

Kaitens are based on the homing torpedo types V and XI with a broader sensor range as it was not possible to add an eyeball sensor to them.

they are fired from the tubes for now, but have the kaiten 3d model and explosive power too.

try the Jyunsen B mod and see !

keltos

Bubblehead1980 · 11-12-10, 08:07 PM

Quote:

Originally Posted by keltos01

south africa.

I am being harrassed by a DD and an Elco Torpedo Boat. I fired a torp at the torpedo boat which hit the DD

but I was wondering : shouldn't the Elcos be armed with at least a couple depth charges ??

from my readings they were a major pain in the butt to the IJN I-Boats, and this by no small measure since a torp would go underneath them without exploding !

I also read they used to make torpedo attacks and then drop DC on IJN subs.

can we add DC to them ?

keltos

I agree, they should have a few depth charges, say 10 for the sake of gameplay.Wish someone would add depth charges and sonar to the IJN patrol boats.

Hitman · 11-13-10, 03:33 AM

That's interesting info keltos

From the text it seems the captain actually called the AOB, but then the TDC operator converted it to target course before entering it in the TDC. It also seems they calculated a solution for a set moment in the future, and the TDC did not autoupdate like the german or US one. This is difficult to simulate in SH4 with the german TDC

keltos01 · 11-13-10, 08:43 AM

Quote:

Originally Posted by Hitman

That's interesting info keltos

From the text it seems the captain actually called the AOB, but then the TDC operator converted it to target course before entering it in the TDC. It also seems they calculated a solution for a set moment in the future, and the TDC did not autoupdate like the german or US one. This is difficult to simulate in SH4 with the german TDC

did you have time to analyse this ?

USN mission to japan 1946 : IJN TDC analysis

http://www.fischer-tropsch.org/prima...ort%20O-32.pdf

11-13-10, 03:10 PM

you guys going to finish this or what taking a long time

peabody · 11-13-10, 04:31 PM

Quote:

Originally Posted by skidoorider

you guys going to finish this or what taking a long time

Yes it is taking a long time. I have a lot of Real Life issues to deal with and that caused problems with time to work on it. Plus having to learn as we go, it is taking a LOT longer than we wanted. My fault, so I guess you will have to play your campaign until we finish.

Peabody

Bubblehead1980 · 11-13-10, 04:49 PM

Quote:

Originally Posted by skidoorider

you guys going to finish this or what taking a long time

Prob a more polite way to say this, fyi.

11-10-10, 01:42 PM	#916
PL_Andrev Grey Wolf Join Date: Feb 2009 Posts: 992 Downloads: 91 Uploads: 0	What is difference between classical torpedo and kaiten type? __________________

11-12-10, 08:11 AM	#920
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	he talks about getting set up to fire at green 45.. see also the sniking of the Indianapolis : http://www.history.navy.mil/faqs/faq30-8.htm USN mission to japan 1946 : IJN TDC analysis http://www.fischer-tropsch.org/prima...ort%20O-32.pdf keltos __________________ "Honorable Builder of Sinking Ships" Last edited by keltos01; 11-12-10 at 09:20 AM.

11-12-10, 09:34 AM	#921
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	torpedo attack protocol from sunk ! "It was necessary to know range, course and speed of the target in order to aim and obtain a hit - for the most part the captain at the periscope had to make the necessary estimate. If the class of ship were known its speed, of course, could be deduced by counting the engine revolutions with the hydrophones. In the case of a merchant ship one could get the course and speed by following up astern, obtaining the range by radar... ... The expected range at the time of firing - two thousand yards - and the bearing - green fourty five degrees - were set. ... the favorable moment for firing was approaching. I altered the setting on the director to green sixty degrees, range fifteen hundred yards, and began the approach for firing. At last, in a loud voice, I gave the order, "Stand-by - Fire !" The torpedo switch pressed at intervals of two seconds and then the report came from the torpedo room, "All tubes fired and correct" siw torpedoes were speeding, fanwise, towards the enemy ship. ... the ship we had sunk turned out to be the Indianapolis." Hashimoto, Sunk !, 1954, pp 222-225. from I-Boat Captain : "I tried to judge their speed from the bowwave each was making and called out," Target speed is 26 knots ! there are two ships in sight !" then I began to call out ranges and bearings. "bearing Mark !" I cried out, and lieutenant Kondo answered "Set !" the angle between the destroyers' bow and the line of sight between him and me was 40 degrees, right. Range was 600 yards. p 163. __________________ "Honorable Builder of Sinking Ships" Last edited by keltos01; 11-12-10 at 10:11 AM.

11-12-10, 12:00 PM	#922
keltos01 Silent Hunter Join Date: Feb 2008 Location: Milan Italy Posts: 4,999 Downloads: 114 Uploads: 18	Elco torpedo boats south africa. I am being harrassed by a DD and an Elco Torpedo Boat. I fired a torp at the torpedo boat which hit the DD but I was wondering : shouldn't the Elcos be armed with at least a couple depth charges ?? from my readings they were a major pain in the butt to the IJN I-Boats, and this by no small measure since a torp would go underneath them without exploding ! I also read they used to make torpedo attacks and then drop DC on IJN subs. can we add DC to them ? keltos __________________ "Honorable Builder of Sinking Ships"

11-13-10, 03:33 AM	#926
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,099 Downloads: 109 Uploads: 2	That's interesting info keltos From the text it seems the captain actually called the AOB, but then the TDC operator converted it to target course before entering it in the TDC. It also seems they calculated a solution for a set moment in the future, and the TDC did not autoupdate like the german or US one. This is difficult to simulate in SH4 with the german TDC __________________ One day I will return to sea ...

11-10-10, 01:57 PM	#917
Bubblehead1980 Navy Seal Join Date: Apr 2009 Location: Florida USA Posts: 6,922 Downloads: 550 Uploads: 42	Kaitens were human torpedos, literally.They were torpedos with a compartment for a "pilot" So the fish was launched and the pilot could steer the torpedo to the targets.Crazy the Japanese were

11-13-10, 03:10 PM	#928
skidoorider Stowaway Posts: n/a Downloads: Uploads:	you guys going to finish this or what taking a long time