tag:blogger.com,1999:blog-19245896.post1502359419455829580..comments2024-03-29T18:47:52.197+11:00Comments on Submarine Matters & Australian Nuclear Weapons: When is peacetime damage to a submarine major?Pete2http://www.blogger.com/profile/06134037393078707072noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-19245896.post-35597622066420362802017-03-16T18:45:21.388+11:002017-03-16T18:45:21.388+11:00Hi S [at 14/3/17 1:45 PM]
I've added your lat...Hi S [at 14/3/17 1:45 PM]<br /><br />I've added your latest comments to the article text.<br /><br />Regards<br /><br />PetePetehttps://www.blogger.com/profile/02624742078679760819noreply@blogger.comtag:blogger.com,1999:blog-19245896.post-69636890428785396472017-03-16T18:43:48.225+11:002017-03-16T18:43:48.225+11:00Hi MHalblaub
I agree time and money are two impo...Hi MHalblaub <br /><br />I agree time and money are two important measures to damage.<br /><br />Also I'd add:<br /><br />- if nuclear weapons are lost<br /><br />- if there are any fatalities<br /><br />- particularly if the submarine is lost<br /><br />- and deep political embarrassment.<br /><br />All part of Putin's Kursk tragedy. <br /><br />Regards<br /><br />PetePetehttps://www.blogger.com/profile/02624742078679760819noreply@blogger.comtag:blogger.com,1999:blog-19245896.post-88421427529008607972017-03-14T21:20:12.672+11:002017-03-14T21:20:12.672+11:00Dear Pete,
the definition of major could be link...Dear Pete, <br /><br />the definition of major could be linked to two items: time and money.<br /><br />It is a major incident in case one of the two limits is crossed:<br />Major incident according to time in case of e.g. more than 6 months out of duty.<br />Major incident according to money in case e.g. cost for repairs exceed 2 % of original value.<br /><br />In this case both limits are exceeded.<br /><br />Regards,<br />MHalblaub<br />MHalblaubhttps://www.blogger.com/profile/14234020711635190127noreply@blogger.comtag:blogger.com,1999:blog-19245896.post-7324864365904426522017-03-14T13:45:52.970+11:002017-03-14T13:45:52.970+11:00Hi Pete
I will revise comment short time before (...Hi Pete<br /><br />I will revise comment short time before (not comment of 14/3/17 11:18 AM).<br /><br />As torpedo tubes are directly prenetrated into pressure hull, even if visiual damage is not obserbed, damage of pressure hull (such as microcrack, partial yielding, etc) near hull-tube joint is possibly expected. If torpedo tubes act as lever, stress at collision will be concentrate at hull-tube areas. After throughly inspection, needed repair should have been conducted. In the worst cace, hull cutting for replacement of damaged part will be conducted. <br /><br />Grounding 250m below the suface might cause fatal failure such as sinking. <br /><br />HY80 is not strong as a pressure hull material, and 39mm of hull thickness is a bit thin. Usually, range of hull thickness is around 45mm-65mm.<br /><br />Regards<br />S<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19245896.post-62437580147914819722017-03-14T11:46:14.301+11:002017-03-14T11:46:14.301+11:00Thanks S
For your examination of the major repair...Thanks S<br /><br />For your examination of the major repairs that followed Corner Brook's grounding incident.<br /><br />The author of the Canadian Article seems incorrect in implying that there was no damage to the pressure hull.<br /><br />I wonder whether the pressure hull might have ruptured (or torpedo tubes leaked) if the sub grounded 250m below the surface?<br /><br />Regards<br /><br />PetePetehttps://www.blogger.com/profile/02624742078679760819noreply@blogger.comtag:blogger.com,1999:blog-19245896.post-40666986297607684842017-03-14T11:18:38.569+11:002017-03-14T11:18:38.569+11:00Hi Pete
Displacement of HMCS Coner Brook is 2500t...Hi Pete<br /><br />Displacement of HMCS Coner Brook is 2500ton, not 3500ton.<br /><br />Based on cross section [1] and a picture of damaged Coner Books, possible failure mechanism is as follows. The cross section suggests the glassfiber cover acted as shock absorber. The topedo tubes as strength as pressure hull were immediately pushed at collision, as a result welding between tubes and hull might be damaged.<br /><br />As collision caused strain of pressure hull, front part of pressure hull was cut in round and was replaced by new part. At hull cutting, new strain may be caused in undamaged part. Slight inconsistancy between undamaged part and new part may be caused, providing significant reduction in maximam submerge depth [2].<br /><br />[1]https://en.wikipedia.org/wiki/Upholder/Victoria-class_submarine#/media/File:HMCS_VICTORIA.jpg<br /><br />[2]Clushig depth (S1) is described as function of maximam submerging depth (S2) by using safe coefficient (C).<br />I explaine S2 by using simple description of S1 = C x S2.<br />For virgin structure with S1=600m and C=2, S2 is 300m (600m =2 x S2).<br />For rewelded structure, C must be icreased. If C=3, then S2 is 200m (600m=3 x S2).<br /><br />Regards<br />S<br />Anonymousnoreply@blogger.com