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Posted: 12/24/2022 9:38:41 AM EDT
[#1]
Quote HistoryQuoted: Sure, 100 years ago in an open industrial sized war over the open water where other industrial scale deterrents like nuclear arsenals and guided missiles from the other side of the planet weren't an option. not saying submarines are totally useless in a Strategic warfare. Just saying we don't actually do open industrial strategic warfare any more, and when we do, yet one more billion dollar submarine at a time one doesn't have a competent ground Army, may not be the best investment. Nobody's strategic warfare plan in the 2000's is seriously going to go that far if the plan is to torpedo enemy shipping into submission; when there are rockets that will go 1000+ miles already for a lot cheaper. Having a small handful as a deterrent and for the occasional go-fuck-with-that-guy mission makes sense. Having more then that, gets to diminishing returns of value of investment real fast. How useful have these been at imposing force into the Ukraine, or embargo'ing the staggering degree of resupply? The Brits screwed the Argies Navy pretty hard with a little bit of SSN play. |
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Posted: 12/24/2022 9:42:08 AM EDT
[#2]
Quote HistoryQuoted: Yep, the surface fleet is pretty much the same sorry state. But Putin spent hard the last decade + on improved, wholly new SSBNs, where bang-for-buck is large in the whole threat matrix. Six Borei class are in commission now - the Suvorov in fact just entered this week, and the next one in line launched this month and will commission next year. They laid down two more this year. Personally, one of my side aspirations for the war truly is the hard bankruptcy of the RF or it's self-inflicted break-up so that the big missile sub push gets derailed and/or the fleet diminished. You are correct about where he is spending his money. Subs and monster ICBMs. |
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Posted: 12/24/2022 10:08:16 AM EDT
[#3]
Quote HistoryQuoted: Velikie Luki is the thing to say, on a bright Hawaiian Christmas Day…Fuck Russia  My kids just discovered this song. |
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Posted: 12/24/2022 10:10:36 AM EDT
[#4]
How soon before it becomes a tourist boat?
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Posted: 12/24/2022 10:28:37 AM EDT
[#5]
Quote HistoryQuoted: They don't have the resources to do half the things they're doing. But they don't want to not produce these things at all because once they stop, it will take a generation to start them up again. Quote HistoryQuoted: Quoted: All of which is actually a pretty good summary of the value and quite likely very true. But you have to admit, expanding the nuclear sub fleet probably isn't where Russia needs to be investing right now. They don't have the resources to do half the things they're doing. But they don't want to not produce these things at all because once they stop, it will take a generation to start them up again. The stupid thing is that Russia is a land nation with no need of naval force. They're so big geographically and have all the natural resources they need, a blue water Navy doesn't do much for them. Their critical need is to have the best theater land forces. Maintaining a Navy detracts from that. Fuck Russia. |
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Posted: 12/24/2022 10:30:25 AM EDT
[#6]
Quote HistoryQuoted: Good. By all means, Russia should spend their military budget on the diminishing return of yet one more of these useless things, and avoid investing in things like: fuel trucks, training, artillery, or ground-force communications gear. When's the last time a navy said: "Whew! Good thing we had those subs - that made the difference and now we won the war" ? |
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Posted: 12/24/2022 10:31:33 AM EDT
[#7]
Is it me or is the propeller made of brass?
The Russia have pretty good subs. I think it was around 2010 there was one in the Gulf of Mexico that we didn't know about until it crossed back into the Atlantic. |
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Posted: 12/24/2022 10:40:30 AM EDT
[#8]
Quote HistoryQuoted: Is it me or is the propeller made of brass? I am guessing it has a higher bronze content in the alloy than most, and they polish them very highly when finishing them out. It will dull-out rapidly in use. |
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Posted: 12/24/2022 10:40:33 AM EDT
[#9]
Quote HistoryQuoted: Our sub fleet is a very important part of our Navy. The ability to fuck you up or even end the world from anywhere virtually undetected is a strong deterrent. Quote HistoryQuoted: Quoted: When's the last time a navy said: "Whew! Good thing we had those subs - that made the difference and now we won the war" ? Our sub fleet is a very important part of our Navy. The ability to fuck you up or even end the world from anywhere virtually undetected is a strong deterrent. Trident II has 12 mirvs x 24 missiles = 288 warheads per boat. That's 4032 warheads* Add in the 4 British Vanguard class subs' 768 Trident II warheads and you have 4,800. * The internet is not consistent regarding the number of mirvs (8-12) and whether all Ohio SSBN have Trident II or some still fielding Trident I (8 mirvs). But still, that's a lot of "get off my planet" to contend with. |
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Posted: 12/24/2022 10:40:44 AM EDT
[#10]
I like the ring of red white and blue balloons around the speaking platform, very American of them.
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Posted: 12/24/2022 10:42:32 AM EDT
[#11]
Fuck Russia , Fuck Putin And Fuck Russian People
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Posted: 12/24/2022 10:43:01 AM EDT
[#12]
So when is Europe going to sink it?
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Posted: 12/24/2022 10:46:03 AM EDT
[#13]
Quote HistoryQuoted: Seems strange you would go to battle stations for 'banter.' Then again, I don't know jack shit about naval procedures. We weren't at battle stations for banter. We were at battle stations because we were in the area where she was sighted. Then a big let down. Then banter. Then secure battle stations. |
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Posted: 12/24/2022 10:47:09 AM EDT
[#14]
Quote HistoryQuoted: When standing over the real world Risk board, our enemies have no answer to our 14 Ohio class SBN fleet and their payload. Trident II has 12 mirvs x 24 missiles = 288 warheads per boat. That's 4032 warheads* Add in the 4 British Vanguard class subs' 768 Trident II warheads and you have 4,800. * The internet is not consistent regarding the number of mirvs (8-12) and whether all Ohio SSBN have Trident II or some still fielding Trident I (8 mirvs). But still, that's a lot of "get off my planet" to contend with. Tridents haven't carried that many warheads for decades. US only has 1500 deployed nuclear weapons across the entire triad. |
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Posted: 12/24/2022 11:07:28 AM EDT
[#15]
Quote HistoryQuoted: I am an enormous fan of naval mines and P-8s. But P-8s can’t penetrate and loiter forever, or stealthily. As the Nine-dash line becomes a de facto thing, they can’t do the job - but nor can any single platform. Also, mines are still fairly “vehicle agnostic” and can’t be used to control things the world ALSO needs, like the Singapore and Malacca Straits and it can’t be done autonomously. I agree whole heartedly about mining early and often - just like voting in Boston. LUUVs will also be a fabulous tool in the future but just aren’t there yet from what I can understand. I noted from some vague DoD releases, that we sent a few different kinds of prototype UUVs to Ukraine, in fact. May pick up some added lessons learned vs. what we picked up during testing. Quote HistoryQuoted: Quoted: Naval mines dropped from heavy bombers weren't deployed until near the end of the war. They ended up being the lowest cost per ton sank in both money and lives. If you want to stop China's shipping fleets, air dropped naval mines will get you there a lot faster than weapons deployed by 68 submarines. Subs are great when you need stealth, but bombers and naval patrol aircraft are much faster and mines are cheap and can hang around unmanned. We really need to get on the whole air deployed naval mine thing at the beginning instead of the end. I am an enormous fan of naval mines and P-8s. But P-8s can’t penetrate and loiter forever, or stealthily. As the Nine-dash line becomes a de facto thing, they can’t do the job - but nor can any single platform. Also, mines are still fairly “vehicle agnostic” and can’t be used to control things the world ALSO needs, like the Singapore and Malacca Straits and it can’t be done autonomously. I agree whole heartedly about mining early and often - just like voting in Boston. LUUVs will also be a fabulous tool in the future but just aren’t there yet from what I can understand. I noted from some vague DoD releases, that we sent a few different kinds of prototype UUVs to Ukraine, in fact. May pick up some added lessons learned vs. what we picked up during testing. I wonder what a stealthy mine laying platform might look like? Navy Offers Glimpse Of Its Submarine-Launched Mine Capabilities In The Mediterranean |
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Posted: 12/24/2022 11:16:21 AM EDT
[#16]
Quote HistoryQuoted: Tridents haven't carried that many warheads for decades. US only has 1500 deployed nuclear weapons across the entire triad. Quote HistoryQuoted: Quoted: When standing over the real world Risk board, our enemies have no answer to our 14 Ohio class SBN fleet and their payload. Trident II has 12 mirvs x 24 missiles = 288 warheads per boat. That's 4032 warheads* Add in the 4 British Vanguard class subs' 768 Trident II warheads and you have 4,800. * The internet is not consistent regarding the number of mirvs (8-12) and whether all Ohio SSBN have Trident II or some still fielding Trident I (8 mirvs). But still, that's a lot of "get off my planet" to contend with. Tridents haven't carried that many warheads for decades. US only has 1500 deployed nuclear weapons across the entire triad. The real question is how many SLBMs the Chicoms are fielding... |
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Posted: 12/24/2022 11:34:58 AM EDT
[#17]
Quoted: Tridents haven't carried that many warheads for decades. US only has 1500 deployed nuclear weapons across the entire triad. Yeah, START dramatically reduced the throw-weight they can carry, so how many warheads they carry also varies by which ones and the yield mix. I’ve always speculated what awesome weapons a MIRVd Trident V could be with a kinetic payload instead of a physics package. I wonder if it’s not time to develop that more (or is it?). No restrictions on that. Quoted: I wonder what a stealthy mine laying platform might look like? Navy Offers Glimpse Of Its Submarine-Launched Mine Capabilities In The Mediterranean I’ve read about that a little bit. Wonder where they are on it because we really could use a lot of those bunkered in Australia and Guam. |
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Posted: 12/24/2022 11:44:37 AM EDT
[#18]
Quote HistoryQuoted: I am an enormous fan of naval mines and P-8s. But P-8s can't penetrate and loiter forever, or stealthily. As the Nine-dash line becomes a de facto thing, they can't do the job - but nor can any single platform. Also, mines are still fairly "vehicle agnostic" and can't be used to control things the world ALSO needs, like the Singapore and Malacca Straits and it can't be done autonomously. I agree whole heartedly about mining early and often - just like voting in Boston. LUUVs will also be a fabulous tool in the future but just aren't there yet from what I can understand. I noted from some vague DoD releases, that we sent a few different kinds of prototype UUVs to Ukraine, in fact. May pick up some added lessons learned vs. what we picked up during testing. But I think we need more emphasis on mine laying capability especially air borne. The real China could probably use mines as a key factor of defense from the communist. Ship deployment might be a good choice. What I have said is fairly primitive. I hope we have people with advanced strategies and knowledge figuring out how mines could change a war against a sea faring giant. Mines are very much like durable drones that sit around and and wait. |
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Posted: 12/24/2022 11:57:30 AM EDT
[#19]
Quote HistoryQuoted: I wonder what a stealthy mine laying platform might look like? Navy Offers Glimpse Of Its Submarine-Launched Mine Capabilities In The Mediterranean |
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Posted: 12/24/2022 12:06:47 PM EDT
[#20]
Quote HistoryQuoted: The real question is how many SLBMs the Chicoms are fielding... They are building a new class but I doubt it will be an Ohio competitor let alone a Columbia. Chinese ICBM fields are popping up like mushrooms however. The Gobi is littered with them. |
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Posted: 12/24/2022 12:08:56 PM EDT
[#21]
Quote HistoryQuoted: Yeah, START dramatically reduced the throw-weight they can carry, so how many warheads they carry also varies by which ones and the yield mix. I've always speculated what awesome weapons a MIRVd Trident V could be with a kinetic payload instead of a physics package. I wonder if it's not time to develop that more (or is it?). No restrictions on that. I've read about that a little bit. Wonder where they are on it because we really could use a lot of those bunkered in Australia and Guam. That could get awkward quickly. |
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Posted: 12/24/2022 12:10:55 PM EDT
[#22]
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Posted: 12/24/2022 12:15:34 PM EDT
[#23]
Quote HistoryQuoted: Yeah, shooting missiles is cool and all but every submariner wants to torpedo some shit. As my son once told me, "There's subs, everything else is a target". He spent 6 years on subs, both fast attack and boomer. |
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Posted: 12/24/2022 12:18:54 PM EDT
[#24]
Quote HistoryQuoted: Oh it's been developed I imagine, along with the little 5kt warhead. The problem is when it launches it looks just like a strategic nuke. That could get awkward quickly. Familiar with that argument, but I think it’s vastly overstated. Ballistic missiles are used in war nowadays. The “launch on detect” policy is long gone - if it ever really was a policy. Launch orders wouldn’t even get executed before impact, so the non-nuclear nature would be apparent. I think it’s an underutilized tactic, and it is basically free given START and excess capacity and delivery vehicles. Using them on things like Mischief Reef, etc. would be ideal. Terribly effective at stopping boomers in port from putting to sea, etc. |
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Posted: 12/24/2022 12:21:51 PM EDT
[#25]
Quote HistoryQuoted: They are concealing part of it…you can see a similar part(I have no clue what it’s called) uncovered here, projecting out of the center of the propeller. Its called a vortex dissipator, nothing new and lots of different designs out there. @22caliberKIDD |
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Posted: 12/24/2022 12:23:10 PM EDT
[#26]
Quote HistoryQuoted: It's an upgraded Kilo-class. The prop is probably not even the oldest or more commonly known piece of tech on it. Which, that tells you where Russian manufacturing is - they've cranked out three diesel-electric subs. So they're less capable than ze Germans? |
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Posted: 12/24/2022 12:25:24 PM EDT
[#27]
Quote HistoryThey have a great track record for losing subs. |
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Posted: 12/24/2022 12:29:29 PM EDT
[#28]
Quote HistoryQuoted: Familiar with that argument, but I think it's vastly overstated. Ballistic missiles are used in war nowadays. The "launch on detect" policy is long gone - if it ever really was a policy. Launch orders wouldn't even get executed before impact, so the non-nuclear nature would be apparent. I think it's an underutilized tactic, and it is basically free given START and excess capacity and delivery vehicles. Using them on things like Mischief Reef, etc. would be ideal. Terribly effective at stopping boomers in port from putting to sea, etc. Send a B-21 to do the needful instead. The only argument for using a very expensive ballistic missile with a conventional warhead is global prompt strike. That would need to be one helluva HVT. |
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Posted: 12/24/2022 12:32:42 PM EDT
[#29]
Quote HistoryQuoted: The fact that our submarines haven't sunk tonnage since WW2 is why we (USS Miami) were excited to get orders to hunt and kill an Al-Qaeda drug running ship during the Iraq war in 2003. Our morale was so high when we went to battle stations for it. But alas, the surface fleet found her first. Yeah, shooting missiles is cool and all but every submariner wants to torpedo some shit. Now the only "tonnage" they sink is fat girls at port.. true story |
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Posted: 12/24/2022 12:34:51 PM EDT
[#30]
Quote HistoryQuoted: Now the only "tonnage" they sink is fat girls at port.. true story Username checks out... |
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Posted: 12/24/2022 12:35:34 PM EDT
[#31]
Quote HistoryQuoted: SRBMs (iskander ATACMS) and ICBM/SLBMs don't have the same trajectories. Upon detection they are classified quickly. Unless there is an obvious difference in flight characteristics between a conventionally armed Trident and a nuclear one....its a big risk. You must assume that they would only be used for very high value targets in times of elevated tensions. Send a B-21 to do the needful instead. The only argument for using a very expensive ballistic missile with a conventional warhead is global prompt strike. That would need to be one helluva HVT. You are assuming (as I did until this past spring) Russians still have satellites that can see ICBMs in flight. They do not; lost it. Conversely, in a war scenario, that we allow the Chinese to keep theirs (we have that ability). Stopping boomers from launching would indeed be an HVT by definition. A niche weapon, yes, but extremely useful. |
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Posted: 12/24/2022 12:36:32 PM EDT
[#32]
Quote HistoryQuoted: I am an enormous fan of naval mines and P-8s. But P-8s can’t penetrate and loiter forever, or stealthily. As the Nine-dash line becomes a de facto thing, they can’t do the job - but nor can any single platform. Also, mines are still fairly “vehicle agnostic” and can’t be used to control things the world ALSO needs, like the Singapore and Malacca Straits and it can’t be done autonomously. I agree whole heartedly about mining early and often - just like voting in Boston. LUUVs will also be a fabulous tool in the future but just aren’t there yet from what I can understand. I noted from some vague DoD releases, that we sent a few different kinds of prototype UUVs to Ukraine, in fact. May pick up some added lessons learned vs. what we picked up during testing. Out of my lane, but most (Naval warships) have anti-mine tech installed, demagnetize the hull etc etc. With that said, I have no idea what modern mines are in use or what anti mine tech is online. Off to Google... |
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Posted: 12/24/2022 12:40:54 PM EDT
[#33]
Quote HistoryQuoted: You are assuming (as I did until this past spring) Russians still have satellites that can see ICBMs in flight. They do not; lost it. Conversely, in a war scenario, that we allow the Chinese to keep theirs (we have that ability). Stopping boomers from launching would indeed be an HVT by definition. A niche weapon, yes, but extremely useful. The Hamsters know about the Russian Woodpecker from the cold war...same thing only newer. Our satellite systems were infrared plume detection for early warning, so the same problem applies. A Satan looks like a Satan no matter what the payload is. |
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Posted: 12/24/2022 12:41:27 PM EDT
[#34]
Quote HistoryQuoted: Out of my lane, but most (Naval warships) have anti-mine tech installed, demagnetize the hull etc etc. With that said, I have no idea what modern mines are in use or what anti mine tech is online. Off to Google... |
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Posted: 12/24/2022 12:44:33 PM EDT
[#35]
Quoted: Interesting the prop isn't covered, normally these are kept hidden as prop design is considered a classified technology. https://www.navalnews.com/naval-news/2022/12/admiralty-shipyard-launches-3rd-lada-class-submarine-velikie-luki/ https://cdn.motor1.com/images/mgl/A2r49/s1/wcf-lada-classic-lada-21071.jpg https://www.navalnews.com/wp-content/uploads/2022/12/project-677-velikie-luki-submarine-launched.jpg https://www.navalnews.com/wp-content/uploads/2022/12/project-677-velikie-luki-submarine-launched2.jpg.webp Just showing off that they have our designs. |
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Posted: 12/24/2022 12:44:36 PM EDT
[#36]
I wonder if the provisions and medical supplies for it are from 1950's, just like what was found on captured Russians in Ukraine?
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Posted: 12/24/2022 12:47:30 PM EDT
[#37]
Quote HistoryQuoted: I wonder if the provisions and medical supplies for it are from 1950's, just like what was found on captured Russians in Ukraine? They like to keep ancient religious artifacts on their ships as shrines.. https://www.google.com/amp/s/news.yahoo.com/amphtml/russian-warship-sunken-ukraine-war-091746009.html |
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Posted: 12/24/2022 12:54:51 PM EDT
[#38]
Quote HistoryQuoted: Yep, the surface fleet is pretty much the same sorry state. But Putin spent hard the last decade + on improved, wholly new SSBNs, where bang-for-buck is large in the whole threat matrix. Six Borei class are in commission now - the Suvorov in fact just entered this week, and the next one in line launched this month and will commission next year. They laid down two more this year. Personally, one of my side aspirations for the war truly is the hard bankruptcy of the RF or it’s self-inflicted break-up so that the big missile sub push gets derailed and/or the fleet diminished. The bankruptcy will be American |
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Posted: 12/24/2022 1:04:30 PM EDT
[#39]
Quote HistoryQuoted: I am guessing it has a higher bronze content in the alloy than most, and they polish them very highly when finishing them out. It will dull-out rapidly in use. Quote HistoryQuoted: Quoted: Is it me or is the propeller made of brass? I am guessing it has a higher bronze content in the alloy than most, and they polish them very highly when finishing them out. It will dull-out rapidly in use. |
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Posted: 12/24/2022 1:05:02 PM EDT
[#40]
Quoted: Out of my lane, but most (Naval warships) have anti-mine tech installed, demagnetize the hull etc etc. With that said, I have no idea what modern mines are in use or what anti mine tech is online. Off to Google... You are in for a shock. ;). DeGaussing nowadays is about like sprinkling on some Holy Water before a gunfight - it will have about the same effect. Quoted: They haven't had it for years. But they do have ground based over the horizon radars. Similar to our COBRA DANE systems...I think there is a newer one as well. The Hamsters know about the Russian Woodpecker from the cold war...same thing only newer. Our satellite systems were infrared plume detection for early warning, so the same problem applies. A Satan looks like a Satan no matter what the payload is. But a Satan looks like a Satan to an SM-3, also. ;). A fight we can win (I don’t want to fight that fight - just a thought exercise). Merry Christmas!  Attached File |
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Posted: 12/24/2022 1:16:39 PM EDT
[#41]
Quote HistoryQuoted: I have no idea about submarines, but commercial vessels usually have props made from an alloy called NiBral. Stainless/Aluminum/Bronze/Nickel are all the main components in propellors, alloyed for different levels of cost/corrosion resistance/machining ease. So NiBrAl is a colloquial for a specific nickel/bronze/aluminum mix. I *think* from reading about this a while back, the subs use more bronze on average because for some reason it cavitates less wrt to edge vortices. I don’t know why or if I’m recalling 100% correctly. Commercial ships use much more expensive mixes that recreational boaters because they don’t haul out, reduced cavitation is good for fuel efficiency and economics, and greater service life. Subs end up on the crazy $$ end of the alloy matrix because instead of all that, they care greatly about acoustic signature that no one else cares about - thus the elaborate blade design, alloy mix, use of vortex diffusers - and that’s on the non pump-jet boats. I went down the rabbit hole on this a few years ago when I was looking at prop design wrt to my own small cuddy cabin and also a friend’s old tugboat. Not an expert but got curious. |
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Posted: 12/24/2022 1:34:55 PM EDT
[#42]
Quote HistoryQuoted: Now the only "tonnage" they sink is fat girls at port.. true story  They're called Grotopottamous for a reason. |
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Posted: 12/24/2022 1:38:48 PM EDT
[#43]
Quote HistoryQuoted: /media/mediaFiles/sharedAlbum/5ddc336bfd9db244c913783d-460.gif They're called Grotopottamous for a reason.  |
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Posted: 12/24/2022 1:50:50 PM EDT
[#44]
Quote HistoryQuoted: They haven't had it for years. But they do have ground based over the horizon radars. Similar to our COBRA DANE systems...I think there is a newer one as well. The Hamsters know about the Russian Woodpecker from the cold war...same thing only newer. Our satellite systems were infrared plume detection for early warning, so the same problem applies. A Satan looks like a Satan no matter what the payload is. LoL, I just found this Trident pic on another thread. I’m waiting for family to get up/active this am; I have to say it’s been one of the more amusing Christmas Eve mornings in memory…  Attached File |
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Posted: 12/24/2022 2:05:50 PM EDT
[#45]
Quote HistoryQuoted: It's an upgraded Kilo-class. The prop is probably not even the oldest or more commonly known piece of tech on it. Which, that tells you where Russian manufacturing is - they've cranked out three diesel-electric subs. It's OK - it was prop technology stolen from the US... |
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Posted: 12/24/2022 2:20:58 PM EDT
[#46]
Quote HistoryQuoted: LoL, I just found this Trident pic on another thread. I’m waiting for family to get up/active this am; I have to say it’s been one of the more amusing Christmas Eve mornings in memory… https://www.ar15.com/media/mediaFiles/556465/2713B525-930F-4A90-A97E-F9D32B3E8B55_jpe-2647202.JPG @Jack67 Minuteman III payload. |
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Posted: 12/24/2022 2:23:44 PM EDT
[#47]
I am become death
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Posted: 12/24/2022 2:25:27 PM EDT
[#48]
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Posted: 12/24/2022 2:51:23 PM EDT
[#49]
Quote HistoryQuoted: Stainless/Aluminum/Bronze/Nickel are all the main components in propellors, alloyed for different levels of cost/corrosion resistance/machining ease. So NiBrAl is a colloquial for a specific nickel/bronze/aluminum mix. I *think* from reading about this a while back, the subs use more bronze on average because for some reason it cavitates less wrt to edge vortices. I don't know why or if I'm recalling 100% correctly. Commercial ships use much more expensive mixes that recreational boaters because they don't haul out, reduced cavitation is good for fuel efficiency and economics, and greater service life. Subs end up on the crazy $$ end of the alloy matrix because instead of all that, they care greatly about acoustic signature that no one else cares about - thus the elaborate blade design, alloy mix, use of vortex diffusers - and that's on the non pump-jet boats. I went down the rabbit hole on this a few years ago when I was looking at prop design wrt to my own small cuddy cabin and also a friend's old tugboat. Not an expert but got curious. Quote HistoryQuoted: Quoted: I have no idea about submarines, but commercial vessels usually have props made from an alloy called NiBral. Stainless/Aluminum/Bronze/Nickel are all the main components in propellors, alloyed for different levels of cost/corrosion resistance/machining ease. So NiBrAl is a colloquial for a specific nickel/bronze/aluminum mix. I *think* from reading about this a while back, the subs use more bronze on average because for some reason it cavitates less wrt to edge vortices. I don't know why or if I'm recalling 100% correctly. Commercial ships use much more expensive mixes that recreational boaters because they don't haul out, reduced cavitation is good for fuel efficiency and economics, and greater service life. Subs end up on the crazy $$ end of the alloy matrix because instead of all that, they care greatly about acoustic signature that no one else cares about - thus the elaborate blade design, alloy mix, use of vortex diffusers - and that's on the non pump-jet boats. I went down the rabbit hole on this a few years ago when I was looking at prop design wrt to my own small cuddy cabin and also a friend's old tugboat. Not an expert but got curious.  |
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Posted: 12/24/2022 5:50:25 PM EDT
[#50]
Quote HistoryQuoted: /media/mediaFiles/sharedAlbum/5ddc336bfd9db244c913783d-460.gif They're called Grotopottamous for a reason. As an HT on AS-32 I can completely relate.. luckily I was in Asia and not many fatties in those ports, although an occasional orangutan was offered up for "services". I'm a sailor but God damn not that hard core... |
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