tag:blogger.com,1999:blog-19245896.post7641253719948119712..comments2024-03-29T18:47:52.197+11:00Comments on Submarine Matters & Australian Nuclear Weapons: Updated Table of Japan's Soryu & Oyashio Submarine Program: Admiral Kobayashi Pete2http://www.blogger.com/profile/06134037393078707072noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-19245896.post-88066977198763910782017-11-08T22:20:51.426+11:002017-11-08T22:20:51.426+11:00Hi Pete [8/11/17 12:32 PM]
Kyle Mizokami’s articl...Hi Pete [8/11/17 12:32 PM]<br /><br />Kyle Mizokami’s article is interesting, but, I do not satisfy following paragraph. <br /><br />“The Soryu class isn’t perfect, though: one major criticism of the boats during the Australian submarine competition was their relatively short operating range. At 6,100 nautical miles, the Soryu’s range wasn’t an issue for their original mission: protecting the home waters of Japan.” <br /><br /><br />JMSDF has huge data on patrol of its submarines, and grasps maximam range and adequate amout of fuel to be loaded. Based on these data, optimal design of submarine is conducted. For example, if submarine loads excess amount of fuel, it become bigger and more to-be-detected. Relatively short range of 6100 nm proves optimal design of Japanese submarine, and very long operation range may be failure of design, because concept of opimal design is not well understood. According to JMSDF, Soryu stays on the ocean floor for a week to surveillance. In such situation, bigger sonar is needed instead of huge amount of fuel.<br /><br />Regards<br />S<br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19245896.post-22571683929402800062017-11-08T12:32:03.922+11:002017-11-08T12:32:03.922+11:00Kyle Mizokami, at The National Interest, has writt...Kyle Mizokami, at The National Interest, has written a good description of the Soryu's characteristics including its limited range. <br /><br />See it at http://nationalinterest.org/blog/the-buzz/japan-just-might-have-the-worlds-best-non-nuclear-stealth-23085?page=show of 7 November 2017Petehttps://www.blogger.com/profile/02624742078679760819noreply@blogger.comtag:blogger.com,1999:blog-19245896.post-64634006310250336272017-09-14T16:24:46.918+10:002017-09-14T16:24:46.918+10:00Hi KQN
I see it more likely China would use the d...Hi KQN<br /><br />I see it more likely China would use the developed J-15* for the first few years of CATOBAR (Type 002**) carrier operations.<br /><br />Using an immature J-20 with an immature 002 AND getting past the US F-35 lead may all wait till 2028 or later.<br /><br />* https://en.wikipedia.org/wiki/Shenyang_J-15#Operational_history<br /><br />** http://nationalinterest.org/blog/the-buzz/chinas-next-aircraft-carrier-everything-we-know-so-far-19965<br /><br />Regards<br /><br />PetePetehttps://www.blogger.com/profile/02624742078679760819noreply@blogger.comtag:blogger.com,1999:blog-19245896.post-13276311476010002022017-09-13T16:58:27.174+10:002017-09-13T16:58:27.174+10:00The next China flat top is coming, 2019-2020, this...The next China flat top is coming, 2019-2020, this time with CATOBAR. Drawings on the web show J-20 in hangar, if remotely true that is going to spell troubles for all tose F/A-18 and F-35. USN watch out.<br />KQNAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-19245896.post-60157941458026788622017-09-12T09:11:03.599+10:002017-09-12T09:11:03.599+10:00Hi Pete
In MoD, first year cost and specication o...Hi Pete<br /><br />In MoD, first year cost and specication of purchasing product are two criterions for judging whether the product is new or not. In the case of new product, first year cost is usually incurred and new specification is needed. But it is not the case for 29SS where first year cost is incurred but specication is revised, suggesting that 29SS series belong to Soryu series, but are going to experience big modification.<br /><br />On reseach on quiet propulsion system, low noise driving sytem and its control system is developed. Proto type system is manufactured from 2018 to 2021, and its evaluation is conduced in 2022 with total budget of 5.6 B JPY. As cost of current propulsion system is ca. 1B JPY, big improvement in performance is expect. <br /><br />So, new quite driving and control system may be equipped in late 29SS series (Soryu Mark IV?).<br /><br />Regards<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19245896.post-82962092361117725552017-09-07T17:31:18.745+10:002017-09-07T17:31:18.745+10:00Thanks Anonymous
I'll place your words (at 7/...Thanks Anonymous<br /><br />I'll place your words (at 7/9/17 12:05 AM) in the article text.<br /><br />Regards<br /><br />PetePetehttps://www.blogger.com/profile/02624742078679760819noreply@blogger.comtag:blogger.com,1999:blog-19245896.post-61377225026323574742017-09-07T00:05:38.946+10:002017-09-07T00:05:38.946+10:00Hi Pete
According to MoD, first year cost, which ...Hi Pete<br /><br />According to MoD, first year cost, which includes i) design cost, ii) test cost, iii) technical collaboration cost, and iv) acquisition cost of exclusive jigs/tools, machines and equipment, is related to the first year procurement and is specially required for production.<br /><br />First year cost of 29SS (7.6 B JPY) is much higher than 30SS (2.3 B JPY). One of the reasons may be design cost. Design cost of 29SS is obviously higher than 30SS.<br /><br />Reseachs on quiet propulsion system and hull shape are budgeting. Result of former research will be applied in 29SS-type submarine (Soryu MK III b or MK IV?). Post Soryu may be based on result latter research.<br /><br />Regards<br />Anonymousnoreply@blogger.com