Anonymous has kindly provided a review, Table A (ver 4), of the earlier Table A (ver 3) (provided February 5, 2018 at Submarine Matters)).
At Table A (ver 4) (below) Anonymous introduces the
primary sources of information on modern Japanese submarines [6]. Anonymous has revised the mechanical and
electrical output figures, based on [6]. The importance of electrical ouput when snorting/snorkeling is briefly discussed and rough estimates are added using foregin data.
[Pete Comment: The whole Table and Footnotes appear to constitute a uniquely comprehensive source of information, unavailable elsewhere on the English language Internet. Below there is a small amount of further translation into English by Pete.]
The Revised Figures are expressed in blue color.
Table A (ver 4)
Class
|
First completion year
|
No. of subs
|
Model [1] or [2]
|
No. of diesels
|
No. of cylinders
|
Bore
mm
|
Stroke
mm
|
Mechanical
ouput surfaced
kW
|
Electrical
outpout surfaced
kW
[3]
|
Electrical
output
snorting
kW
[10]
|
Speed
rpm
|
Oyashio .I
|
1960
|
1
|
V8V22/30mAL [1]
|
2
|
16
|
220
|
300
|
993 [6]
|
794
|
-
|
850
|
Oshio
|
1964
|
5
|
V8V24/30mMAL
[1]
|
2
|
16
|
240
|
300
|
1066
[6]
|
853
|
-
|
850
|
Uzushio
|
1970
|
7
|
V8V24/30AMT
[1]
|
2
|
16
|
240
|
300
|
1287
[6]
|
1030
|
-
|
850
|
Yushio
|
1970
|
10
|
V8V24/30AMT
[1]
|
2
|
16
|
240
|
300
|
1545
[6]
|
1236
|
-
|
850
|
Harushio
|
1990
|
7
|
12V25/25S [2]
|
2
|
12
|
250
|
250
|
2280
[6,8,9]
(2500)
|
1824
(2000)
|
-
|
1200
|
Oyashio .II
|
1998
|
11
|
12V25/25S [2]
|
2
|
12
|
250
|
250
|
2500
[6,9]
|
2000
|
>=1800
|
1200
|
Soryu
MK I & II [7]
|
2009
|
11
|
12V25/25SB [2]
|
2
|
12
|
250
|
250
|
2500
|
2000
[11]
|
>=1800
|
1200
|
29SS
|
-
|
-
|
12V25/31S [2] [4]
|
2
|
12
|
250
|
310
|
3100
|
2500
[11]
|
>=2250
|
1200
|
[1]
KAWASAKI (under the license of MAN): V8V22/30mAL, V8V24/30mMAL, V8V24/30AMT
[2]
KAWASAKI: 12V25/25S, 12V25/25SB, 12V25/31S
[3]
Electical output = mechanical output x 0.8
[4]
Estimated values:
[5] “Historical
Development of Four Stroke Diesel Engine” by Kazuya
Sato, Center
of the History of Japanese Industrial Technology, National Museum of Nature and
Science. This is comprehensive review. Representative diesel
manufacturers in Japan (KHI, MHI, MAN-Japan, JFE, Mitsui, etc) reviewed that article.
[6] “History of Japan Maritime Defense
Force Submarine” by Dr Yoichi Hirama.
Past positions of Dr Hirama are Rear
Admiral (Maritime Self-Defense Force:Navy/Retired 1988), Professor &
Director of Library of National Defense Academy (Retired 1998), Lecturer of
Tsukuba University (International Relations/Retired 2002), Lecturerof Tokiwa
University (Japanese History/Retired 2003). This article is the primary source
of information on modern Japanese submarine (except Soryus and Post Soryus),
and search procedure is as follows:
(1) Click "Papers"
(2) Search “English History”
(3) scroll down, then Click”Japao n l'auto defense”, Marines
& Navales:Hors Serie Sous-Marins:Special sous-Marins Diesels(Paris:2004)
(English version), which provides "History of the Japanese Submarine(After WWII)
or
(4) for original Japanese language version Click "History of Japan Maritime
Defense Force Submarine “
[7]
Based on those of 12V25/25S for Oyashio [6].
[8] Unfortunatedly, output of 12V25/25S for
Harushio-class shows contradiction in English version of [6] (English version
3100PS=2280kW & 3400PS (2500kW), Japanese version 3100PS=2280kW),and
considering that Dr Hirama is Japanese, 3100PS =2280kW of mechanical output is
used for Revised Table A (ver4).
[9] Since diesel engines are greatly
dependent on the back pressure of the exhaust system in terms of their efficiency, decision on electrical output when snorkeling need information on the snorkel system. If the snorkel system of Oyashio.II -class is more effective than that
of Harushio-class, mechanical output of 12V25/25S in Oyashio.II-class would show a higher
output than the same 12V25/25S in Harushio-class.
[10] The charge of the battery must take
place at the highest generator output to reduce the time of the submarine in snorting/snorkeling mode, or, the time in which submarine can be detecteded (indiscrete) would increase. That’s why
information on electrical output in snorting/snorkeling mode is quite important. But there is no
information in [6].
In http://www.bmtdsl.co.uk/media/5045649/BMTDSL-Sub-Power-and-Propulsion-Confpaper-Pacific-Jan12.pdf page 2, “As an example the MTU 12V 396TE54
is rated at 1200kWe (electrical output) for the surface ship TE54 designation
but when employed in the submarine version it is derated to 1000kW on the
surface and 900kW when snorting”. This data (10% output reduction by
snorkeling) was used to roughly estimate electrical output in snorting/snorkeling mode as
reference. Since 12V25/25S and 12V25/25SB as well as 12V25/31S are younger diesels, designed after the MTU 12V396, they may show better efficiency than that MTU (less than 10% output
reduction in snorting/snorkeling mode).
[11] The related standard specifies
electric output of diesel being ---1800kW, 2000kW, 2500kW ---. I think that
2500kW of electrical output as target performance was decided at modification
of 12V25/25SB to 12V25/31S at first, and at next, 310mm of stroke was decided
to achieve this performance.
Anonymous
4 comments:
Hi Pete.
I posted an article on the power systems of the successive JMSDF submarines on my blog before.[1]
Please check it.
[1]http://blog.livedoor.jp/wispywood2344/archives/55670572.html
Regards
wispywood2344
Hi wispywood2344
Looking at your http://blog.livedoor.jp/wispywood2344/archives/55670572.html .
I clicked on "Table 1. List of specifications of the power system of successive Maritime Self-Defense Force submarines" and it produced a readable
http://blog.livedoor.jp/wispywood2344/others/Power_Systems_Of_Successive_JMSDF_Submerines.png
Japanese submarines are frequently described in Submarine Matters.
Can your produce tables on Chinese, Russian and North Korean submarines?
Regards
Pete
Hi Pete.
I'm sorry, it's too difficult for me.
Regards
wispywood2344
That is OK wispywood2344
There is very little public information on Chinese submarines to find and write about.
So only slow progress can be made.
Regards
Pete
Post a Comment