Is the JMSDF SS Oyashio class SSK´s an indegeneous design??

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rinti	Is the JMSDF SS Oyashio class SSK´s an indegeneous design??	Lead	[-]
Posts: 2 (29-Jan-2004 07:32:26) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Hi, reading the posts about the news of RoK building in a near future a SSN y wanted to know the overall quality of JMSDF SSk´s and specifically about the latest SS Oyashio class SSk´s. Perphaps a comparison of the SS Oyashio´s performance with regional competitors. Also some insights of the prospects of a SSN serving in the future for the JMSDF could be a possibility?? Thanks,
taschoene	Re: Is the JMSDF SS Oyashio class SSK´s an indegeneous desig	#1	[-]
Posts: 4231 (29-Jan-2004 07:57:19) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Yes, it is indigenous. I beleive all of the JMSDF's sub designs have been indigneous, though the Hayashios (early 60s) were modeled losely after the US Baracuda (K-1) class. The JMSDF's submarine force is easily the most capable in the region, with large numbers of subs replaced at a very rapid rate. (in 2003, the oldest of the JMSDF's 15 combat subs was only 14 years old, and they had two dedicated training boats only 3 and 10 years old, respectively) Their subs seem quite capable, though one hears very little about their operations. I think nuclear power for the JMSDF is nearly imposible for the forseable future. One only has to see the massive protests that occur when a US nuclear-powered ship enters port to realize the obstacles it would face.
Glen Levick	Re: Is the JMSDF SS Oyashio class SSK´s an indegeneous desig	#2	[-]
Posts: 404 (29-Jan-2004 11:05:01) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	American tear-drop hull design influence (from the BARBEL-class) went into the seven modern UZUSHIO-class, commisioned from 1971~78. But the design was domestic. Each following class has essentially been a development and improvement on the former. Keeping things new and updated is very much the way the Japanese people are, and it's no surprise to me to see this occuring in their naval ship building and procurement programs. On paper, the Japanese SSKs are very capable boats, but as mentioned earlier, we don't hear much about their operations. It is reasonable to assume however that they do get around, at least patrol beyond their own EEZ possibly at times. The new OYASHIO-class especially, is very much an ocean-going type with good endurance. For more on the sub classes and the JMSDF itself try here. Regards, Glenn. ------------------------------------ Visit the Basement Forum - for discussion on war, politics, technology, and more. "Nothing more disappointing to me to see a beautiful woman strike up and start smoking. What a waste.." - A Personal veiw
koxinga888	Re: Is the JMSDF SS Oyashio class SSK´s an indegeneous desig	#3	[-]
Posts: 148 (23-Feb-2004 14:48:36) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	does Japan have any research on AIP technology? If so, is it Stirling or MESMA type close cycle engines? JMSDF boats sounds formitable. But how does it compare to say a Type 212 or a Scorpene? Second, do they send their officers for something like the Perisher course?
Glen Levick	Re: Is the JMSDF SS Oyashio class SSK´s an indegeneous desig	#4	[-]
Posts: 404 (23-Feb-2004 17:46:58) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	A Sterling engine has been fitted to one of the HARUSHIO-class SSKs (Asashio in this case) for trials. Regards, Glenn. ------------------------------------ Super Bowl XXXVIII Champions - The New England Patriots!
Per Nordenberg		#5	[-]
Posts: 724 (29-Jan-2008 16:53:29) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Glen Levick wrote: A Sterling engine has been fitted to one of the HARUSHIO-class SSKs (Asashio in this case) for trials. Regards, Glenn. Actually it's Stirling, not Sterling (which I think is the British currency ;-). The first of the new JMSDF Soryu class SS, an improved Oyashio class SS, was launched on 5 December. Soryu is fitted with Kockums' Stirling AIP system. With a submerged displacement of 4,200 tons she is no doubt the world's largest conventionally powered submarine. From kockums.se: http://www.kockums.se/News/071214.html Also wikipedia has some info on the new class: http://en.wikipedia.org/wiki/S%C5%8Dry%C5%AB_class_submarine Remarkably enough I also managed to find a few small pictures of Soryu at Ships of the World: http://www.ships-net.co.jp/detl/200802/053-054e.html (the pictures are non-clickable I'm afraid ) Anyone here who knows if there are more photos of the new Soryu class on the net? Note that Soryu is only 2,3 m longer than her near sisters of the Oyashio class. As a comparison the RSwN's HMS Näcken is 8 m longer than her two unconverted sisters, and the latest Södermanland class boats are 12 m longer than their two unconverted sisters. The question remains whether any of the original Oyashio class boats will be converted with Kockums' Stirling AIP system as well. All eleven of these boats are less than 10 years old, but on the other hand JMSDF tend to replace it's submarines in a comparatively high tempo. With a submerged displacement of 4,200 tons the new Soryu class SS is without doubt the world's largest conventional submarine. I doubt wikipedia's info on the new Soryu SS though. Surely she has more than one 75 KW Stirling engine. More likely she has four of them! Even the small Swedish AIP boats have two Stirling engines. Regards, Per Nordenberg Last Edited By: Per Nordenberg 29-Jan-2008 17:01:43. Edited 3 times.
Per Nordenberg		#6	[-]
Posts: 725 (29-Jan-2008 17:50:19) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	I managed to find a couple of larger photos of the new Soryu: I also found a video of the launching on 5 December: http://www.geocities.jp/dumbo_seal/soryu.wmv The text in the end of the video also confirms my suspicion that she has four Stirling engines. Regards, Per Nordenberg Last Edited By: Per Nordenberg 29-Jan-2008 17:53:49. Edited 1 times.
Alexius55		#7	[-]
Posts: 227 (29-Jan-2008 20:33:58) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Per Nordenberg wrote: With a submerged displacement of 4,200 tons she is no doubt the world's largest conventionally powered submarine. <</blockquote> In service: Possibly- the Kilo is 4,000 tons. Ever? Definitely not. The I-400 was 6560 tons submerged, and more recently the India-class rescue submarine was a similar size.
Sargon		#8	[-]
Posts: 215 (30-Jan-2008 20:49:18) Rice Boss Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	The JMSDF certainly has a potent force of SSKs...fast, quiet and well suited to the missions expected of them...a major asset in it's capabilties that it is increasing in various areas. Still, there are interesting developments in the region as a whole, especially when one looks at naval planning in Korea and China. It's certainly a fascinating part of the globe for naval development these days. Sargon
caioduilio		#9	[-]
Posts: 39 (30-Jan-2008 23:26:34) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	mmmmh... I imagine that japan should be state of art about design and manufacturing of fuel cells. But they have chosen to buy swedish stirling engines. AFAIK fuel cells should be much better for AIP on submarines. Stirling engines should be a bit more noisy! But japan has bought stirling engines... Any comment on this?
Per Nordenberg		#10	[-]
Posts: 726 (31-Jan-2008 01:11:06) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	caioduilio wrote: mmmmh... I imagine that japan should be state of art about design and manufacturing of fuel cells. But they have chosen to buy swedish stirling engines. AFAIK fuel cells should be much better for AIP on submarines. Stirling engines should be a bit more noisy! But japan has bought stirling engines... Any comment on this? Kockums' Stirling AIP system is less costly than fuel cells. I think you could get 3 Gotland boats for the price of one of the new German U31 boats, but then again Gotland is of course an older boat. Kockums AIP system is also a more mature system having operated successfully since 1988 (then onboard HMS Näcken). Perhaps focus was on cost reduction and reliability for Japan. Stirling engines are also very quiet and vibrationfree. Regards, Per Nordenberg Last Edited By: Per Nordenberg 31-Jan-2008 17:56:17. Edited 1 times.

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Is the JMSDF SS Oyashio class SSK´s an indegeneous design??

Is the JMSDF SS Oyashio class SSK´s an indegeneous design??

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