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Sturgeon's House


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Everything posted by Xlucine

  1. UK is looking into an off-the-shelf buy of an AShM to fill the gap between harpoon retiring and the Next Big Thing: https://www.navalnews.com/naval-news/2019/03/uk-mod-issues-notice-for-interim-ssgw-anti-ship-missiles/
  2. August last year, the tower on top of the engine test stand was gone: https://www.38north.org/2018/11/sohae110818/ More recently, the tower has been rebuilt: https://www.38north.org/2019/03/sohae030519/ Deconstruction doesn't normally involve making a copy of the previous structure just to tear it down again
  3. Why is a normal bullet guide verboten?
  4. Pakistan found a sub: https://www.facebook.com/watch/?v=2950969591583426 Looks like a snorkelling SSK (note the splashing behind the masts), which isn't the hardest thing to find. They're trying to imply it's a scorpene, but the reference images provided don't look like a great match (the masts appear to be more side-by-side on the scorpene, whereas the sub detected looks to have them in a line). I'd guess it's a kilo, so only an 80's vintage 877 design but still capable of launching cruise missiles
  5. This may turn out to be very significant: https://uk.reuters.com/article/uk-india-kashmir-usa-pakistan/us-wants-to-know-if-pakistan-used-us-built-f-16-jets-to-down-indian-warplane-idUKKCN1QK0CV
  6. If this goes through we'll only have to convince NZ to pick up a couple to make a full set of 5-eyes
  7. The initial indian strike has no visible damage in the area near Balakot https://medium.com/dfrlab/surgical-strike-in-pakistan-a-botched-operation-7f6cda834b24
  8. I like it, it looks like they're on an arm so they can swing round and fire forwards without increasing the width of the vehicle or getting in the way of the turret
  9. I'm calling this more Carcinisation https://en.wikipedia.org/wiki/Carcinisation
  10. I can't see any pictures hosted on VK either, but right-click and "copy image location" then pasting that into a new tab normally works
  11. Maple-syrup flavoured T26 is confirmed, after the legal challenge fell through: https://www.janes.com/article/86254/canada-confirms-type-26-frigate-selection I figure this makes it the largest single class of modern warships outside the US and chinese navies
  12. Damn the torpedoes*, full speed ahead! https://www.janes.com/article/86146/us-navy-to-remove-hard-kill-torpedo-defence-from-carriers * I know, wrong torpedoes
  13. Can I start counting the AC and munitions on british carriers then? The role of carriers is to transport AC and munitions, and not let the enemy set fire to them - bad damage control is not enemy action. After tanking more bomb hits than any US carrier, Illustrious went to malta for repairs and was bombed again. Then bombed again (because the med is not the pacific, you're in everyone's airforce's back yard). It took 5 months to get to Norfolk yard, half of the time spent out of action was due to the lack of ports in europe that weren't being bombed You're the one claiming two bombs is enough to total one Up against smaller bombs, and less of them, the US carriers were the right tool for the job. In europe the conditions were different, and so the ideal carrier ends up prioritising other qualities (like ignoring carrier v carrier fleet actions, because nazi's as you point out). Did any US carrier take a 1-ton bomb and keep on trucking?
  14. Unless you're using the parasitic mass savings to carry a bigger warhead, or a better (e.g. multi-mode) fuse
  15. You say that like the only place the RN operated was the Med. They had a worldwide empire. With a bit of experience, the Yorky could have lived, and the US Navy changed A/C fuel handling on Carriers after the Coral Sea and Midway. US Carriers had an armored Deck below the flight deck, and ships like the Enterprise took bomb hits and kept operating, while not suffering permanent, unrepairable, structural damage. The Idea that the Armored flight deck carriers were Armored enough to defeat a determined air attack is laughable. I doubt a Brit Carrier would have lived through what the Franklin took under similar circumstances. You know what, the ENTIRE Royal Navy was overrated in WWII. The USS Franklin took two 500 lb bombs, and that resulted in the highest casualties by any fleet carrier that survived WW2. HMS Illustrious took 7 hits from 500-1000 lb bombs, and a 2000 lb bomb - and continued in service till 1955 (loads of permanent structural damage there!). Even after changing fuel handling systems on US ships, the Franklin still burnt badly in mid '45. Brit carriers were more survivable - find a US carrier that took 7 bomb hits and survived
  16. It's a funny looking gun tube for an M60, and the gunners sight is on the wrong side (for a pukka M1 and M60). I guess the iranians heard everyone saying the zolfaghar looked like the M1, and decided to make the most of the likeness
  17. The V-280 is now worthy of the name: https://ukdefencejournal.org.uk/v-280-valor-reaches-namesake-cruising-speed-of-280-knots/
  18. "Hydrogen generators" for cars are a classic snake oil product. There are some papers discussing improvements to diesel combustion with additions of H2, but they're looking at far higher concentrations (e.g. here[1], looking at flow rates ~2 orders of magnitude above what's likely from an onboard generation system[2]) It's not really a resilient system if you're reliant upon the civilian power grid being able to support sudden demands of 100's of MW at a randomly chosen transformer. It's possible to store enough diesel for a decent attempt at resisting invasion (probably a few days or weeks worth), whereas in an invasion the grid would be a prime and easy target (especially if the military was so reliant on it) - going by recent conflicts and the general plans in the cold war I'd be surprised if any military plans for a invasion to take more than a month [1]: If the link doesn't work: Emission reductions of Air Pollutants from a Heavy-duty Diesel Engine Mixed with Various Amounts of H2/O2, Hsin-Kai Wang, Chia-Yu Cheng, Yuan-Chung Lin, Kang-Shin Chen, Aerosol and Air Quality Research, 12: 133–140, 2012 [2] The video claims the electrolyser uses "less power than the headlights", and according to this calculator 150 W gets you about 1 l H2&O2/min (at STP) - the paper I linked talks about 60 l/min for a 6 l engine. Getting the H2 production up to levels comparable to those tested means drawing ~9 kW in power to run the electrolyser, and for a ~25l tank engine you might expect the need to scale to about 40 kW. Storage of H2 is a different matter, although that raises other issues.
  19. https://www.janes.com/article/86100/germany-eliminates-f-35-from-tornado-replacement-race That's an odd choice, F-35 looks like an ideal tornado replacement
  20. Armoured decks make sense if you're expecting your carriers to get dogpiled by land based aircraft (which come in numbers way bigger than any carrier air wing, so if you squeeze as many AC as possible on board then they'll still outnumber you, and carry bigger bombs). The pacific is not the med, basically A 500 lb bomb is a Very Bad Day for an unarmoured carrier (e.g. yorktown at the battle of the coral sea), whereas armoured carriers were surviving 2000 lb bombs regularly
  21. Tank engines are around 1 MW ea., so assuming a 1:8 ratio of time spent moving to time spent recharging then you need to suck 8 MW from the transformer per tank in the convoy at 100% efficiency - and that's assuming the power grid still works reliably, it was one of the first things to go in the iraq war. It is really a diesel engine at that point? It sounds more like a high compression otto engine, with the spark plug swapped out for an injector (and if hydrogen acts like a high octane fuel, improving on efficiency isn't that unexpected - although under part load it'd have to revert to act like a normal diesel). The defining feature of the diesel cycle is that there is no fuel mix, combustion only occurs at the boundary between the injected fuel-rich diesel droplets and the oxygen-rich rest of the air in the cylinder so there shouldn't be any diesel floating around the combustion chamber to be ignited by hydrogen. Sub-ambient intercooling could run into issues with condensation getting ingested into the engine
  22. That's interesting. I've seen some work on freak waves previously (as in ~15 years ago), but that was looking at 2d waves where one wave would suck energy out of the waves either side of it - building on the work in a 3d pool is neat
  23. Xlucine

    UAV thread

    The total weight is <33g, so maybe a small firecracker? Small-ish suicide UAVs have been done before, of course
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