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Showing content with the highest reputation since 04/15/2021 in all areas

  1. Bismarck wheeled Tank from behind
    4 points
  2. https://breakingdefense.com/2021/04/omfv-why-small-biz-mettleops-has-a-shot/
    4 points
  3. https://www.airspacemag.com/military-aviation/bazooka-charlies-grasshopper-180974445/ Bazooka Charlie and his Piper Cub went tank busting in that battle that Delete here claims never happened. The restoration was finished last year.
    4 points
  4. Man, millions and millions of automatic gearboxes in past eighty years all around the Globe have been equipped with torque converter. If you never heard about the most common coupling solution in automatic gearboxes, it means without any doubt that you have zero clue about transmissions and since differentials are rather difficult topic to grasp I think you shall not argue about them. Even what you just wrote is simply stupid.
    4 points
  5. Soviet evaluation of Pershing in summer 1945 gives some light to the previously discussed terrain speed of Panther and Pershing. The result didn't favour Panther... http://www.tankarchives.ca/2018/03/pershing-heavy-by-necessity.html This is the measured average speed in comparison with other tanks on the same terrain track. Pershing was the fastest of them in this test mainly thanks to its torque converter. T26E3 - 18,9 km/h T-44 - 17,5 km/h M4A4 - 16,5 km/h Panther - 15,8 km/h IS-3 - 14,6 km/h Fuel consumption on the same track ho
    4 points
  6. If it doesn't count as spam, there are some pictures of the spaced-out suspension on a hybrid M4 here.
    4 points
  7. K1s and K1E1s of the 5th Infantry Division conducting training at the Darakdae Training Center.
    4 points
  8. That's a good question, and I'm not sure. Per the spec sheet N-L-M posted, it is a solution hardening (which is the same thing as "age hardening;" metallurgical terminology is nonsense sometimes) alloy. I bet that small titanium addition is what's doing the trick. So the precipitation hardened part could be reset. However, it also has a bit of carbon in it, unlike a lot of other maraging steels. If you tried to "reset" the heat treatment, that carbon could cause some problems. Some carbides form at higher temperatures than the intermetallic precipitates, and if the metal is ho
    3 points
  9. Because, as I stated in my sarcastic suuuure line, the final drive is a very small target (and it's only exposed from some angles!). You'll note other armies have a conspicuous lack of 'oops all our final drives were hit by arty what a shame'. So either the man is bullshitting as to why the final drives broke, or the allies are actually putting their very best marksmen on artillery teams - with strict orders to aim only for final drives. It's rather comparable to exclaiming that the enemy was scoring nothing but headshots on your infantry. You'd think the Germ
    3 points
  10. Why yes, I do. Lets open it up. Nothing to suggest the incident in October 28th was anything but an above-average batch. Final drive complaints come back when fighting with the 654th picks back up in November.
    3 points
  11. It uses a mix of medium and high frequency induction heating. With the device they patented, they are able to treat sections of steel up to 3m in length (which is a pretty big deal since it's usually hard to get NC steel plates that large). Talks about the quenching liquid and cooling rate to prevent cracking, but doens't mention which liquid was used, but does mention that Matensite does form in the cooling process. Talks about maintaining the correct space between the induction heater and steel plate and methodology to maintain that distance despite possible warpage from the heating process.
    3 points
  12. I covered Kamaz chassis that was used for Pantsir, there is an interview somewhere on this forum with soldiers that drive that truck. They drive it carefully, because it have noticeable height and not wide enough, with heavy components on top of the vehicle. Originally Pantsir system was mounted and tested on BAZ-produced truck, which had wider base and lower height of SHORAD module. Perfomance of this system depend on target type, integration in AA network and used counter-measure against it. System wasn't really designed to take out certain types of drones, although i remember
    3 points
  13. Broke: The Brad is the worst IFV and can't do any mission properly. Woke: the Brad is the best of all the IFVs of its vintage and is de facto the yardstick by which all others are measured. Bespoke: The Brad is such an unbelievably good design that it can only be replaced by another Bradley.
    3 points
  14. AMPV with a turret but for arguments sake yeah.
    3 points
  15. Collimatrix

    General AFV Thread

    I'm not sure if strong conclusions can be taken from that one video. Different ammo types produce radically different amounts of recoil. Discarding sabot training ammo doesn't produce too much recoil, while HE-FRAG is firing a big, heavy shell with a lot more momentum. Aside from that, it occurs to me that the 120mm armed tanks listed are all heavier than the 125mm armed ones, although the weight of the K2 and T-14 overlap. How a tank responds to the recoil of its gun firing is a function of the total momentum of the shot, the mass of the vehicle, the moment of inerti
    3 points
  16. You didn't read all of that guy's comments, even: "The whole story was blown out of proportion in subsequent german tertiary reception of the action, most likely due to inaccurate descriptions and lack of access to source documents. Someone started putting the whole units claim incorrectly to Körners credit and then kept on adding whatever Harrer, Diers, Schäfer, Turk, Müller et al. claimed on their own on top to arrive with a new unit claim. And instead of "for no losses", I have hard evidence to confirm that four TIGER Ausf. B were total write offs on this day (two caught by arti
    2 points
  17. Stimpy75

    Turkish touch

    FNSS STA Otokar Tulpar
    2 points
  18. While this is true, the solution heat treat is above that temperature, and everything should dissolve. Forming the wrong precipitates is an issue if you age wrong or if you accidentally age via heat input such as welding later in the process. welding itself is also an issue for precipitation hardened metals if done post-age as it remelts the HAZ had effectively solutionizes it, of course. This is what causes 6061, for example, to lose so much of its strength in the HAZ.
    2 points
  19. Don't hold me on this but as far as I know, there was a picture of a brochure of DM53 posted sometime in the past on the net where it said the penetrator body was 685mm though I don't remember if it also said anything about the diameter; Regardless of this, i think comparing DM53 to Type 10 AFPSDS is a bit of a moot point and it would do us better to compare DM53 to M829A1/2 which both have 680x22mm and 690x22mm penetrators respectively in a projectile body roughly ~760mm long (though it's 779mm long in total). There's also the case of yet another, I believe Rheinmetall
    2 points
  20. You're ignoring the part where critical mass founds his argument on the Soviet losses of that entire part of the front for that day, then elides his way into the two numbers being similar and that therefore Korner's account is somehow legit. Peter goes into this at length.
    2 points
  21. M26 was rated for 60% (31 degrees) as well.
    2 points
  22. https://www.vitalykuzmin.net/Military/Rehearsal-in-Alabino-9-April-2021/i-HJJhwkC Some photos by Vitaliy Kuzmin: K-4386-PVO / Typhoon-PVO armored vehicle (full of MANPADS) Typhoon K-53949 / KAMAZ-53949 Typhoon-K 4x4 with Kord HMG and gunner light protection Typhoon K-53949 / KAMAZ-53949 Typhoon-K 4x4 with 5ETs16U RCWS Typhoon K-4386 / KAMAZ-4386 Typhoon-VDV with 32V01 unmanned turret and 30 mm 2A42 AC. BMP-2M Berezhok BMP-3 and BMD-4M
    2 points
  23. So apperently we are jumping from whole ISS programm in 2025 and building our own space station on a different (higher) orbit, with our own blackjack and hookers. State news already showed first module of this future Russian station in production by Energia. First module is "Nauka" ("Science"), which at first AFAIK will be launched for ISS. According to thise report ISS is too old and getting too costly. "ROS" will be located on higher orbit, will not be constantly manned. Station will be made in such way that changing each module will be faster and easier. One of new
    2 points
  24. As we discussed previously, the design itself was poor because it was known that the available materials were not up to the task. Spielberger says that a higher-strength steel was intended for the gears, but after this was "unexpectedly" replaced no alterations in the design were made (and depending on when this replacement occurred, alterations may have been impossible). The report was from Hauptmann Noak, commander of s.H.Pz.Jg.Abt.654, and was written on 24 July 1944, before the final drive improvements, to be fair.
    2 points
  25. My three cents. Things are much more complicated than what can be conculed by looking at non-scaled pictures. Panther has higher engine output than Pershing. Panther has 4 tons higher weight than Pershing. Panther's transmission is subject to more shocks than that of Pershing (the torque converter combined with the planetary geabox must have eased the shocks in the transmission a lot). All points worse for panther but that's only the base factors. The main point IMHO is that Panther's final drive housing was designed very opened and thus weak (there is ve
    2 points
  26. Turret Weight M1A1 : 23.1 tons (21 metric tons) M1A2 : 26.9 tons (24.4 metric tons) M1A2 SEPv3 : 31.5 tons (28.6 metric tons) Quite the weight jump for the SEPv3. More of an increase over the M1A2 than the M1A2 over a non-DU M1A1.
    2 points
  27. 2 points
  28. SH_MM

    French flair

    The M829A3 sabot mass is 3 kilograms.
    2 points
  29. TWMSR

    French flair

    Great idea It is so silly to put parasitic mass into design, why do not use zero-mass sabots instead? And why waste so much energy on muzzle blast? All energy should go into penetrator, it must be easy task.
    2 points
  30. That entire site of yours is an absolute goldmine. I even got my profile pic from there.
    2 points
  31. Ideally, using the AMPV hull, which also has mine protection improvements and a revised internal layout among others. But on the whole, if you're sticking with a "medium weight" IFV, you could do much worse than a Brad derivative with a RWS 30mm (especially one that's already in service!) and the improvement offered by newer options like the Lynx may not be a sufficient gain to justify their cost. With the AMPV, latest M109s, and the like, the US Army is committed to the Bradley automotive components for the next 40 years or so. Makes sense to me to at least try and leverage that.
    2 points
  32. If anyone is interested in the history behind the development of Chinese third generation tanks, I strongly recommend this article (written in Chinese): Part one https://weibo.com/ttarticle/x/m/show/id/2309404519105649574380?_wb_client_=1 Part two https://weibo.com/ttarticle/x/m/show/id/2309404531003560690005?_wb_client_=1 Part three https://weibo.com/ttarticle/x/m/show/id/2309404571464467873891?_wb_client_=1
    2 points
  33. SH_MM

    French flair

    The 15% figure has been quoted for the change from L/44 to L/55 barrel retaining the same ammunition. Muzzle energy is 12.8 MJ for DM53 fired with the L/55 gun. For the L/55A1 gun firing the KE 2020 Neo round, a 20% increase in performance has been projected - leading to 15.36 MJ muzzle energy. At the current time, this remains speculation. Nexter has not revealed any specific details regarding the ASCALON concept, not even the caliber/bore diameter (Jon Hawkes initially tweeted that it would be a 140 mm gun, but he later corrected this claim). As
    2 points
  34. SH_MM

    General AFV Thread

    The recoil length is 340 mm for the L/44 and L/55 guns with a hard stop at 380 mm. Only the L/47 LLR (light low-recoil) has a recoil length of 500 mm.
    2 points
  35. Photos on a subject Parade vehicle Vehicle that was going through tests. Driver is in front of rest of the crew.
    2 points
  36. ZBD04 (not ZBD04A, I think you guys call it ZBD08?) also don't have a thermal sight. For a pretty long time ZBD04A is the only ifv equipped with thermal sight in the PLA arsenal. For tanks, ZTZ-96A and ZTZ99's sight is pretty much T-90A level (one for thermal and one for daylight, just like ESSA+1G46M on T-90A). ZTZ-99A and VT4 has something similar to SOSNA-U, a multi channel combined day/night sight.
    2 points
  37. Cost and simplified logistics will likely be their primary advantages.
    2 points
  38. In Alabino, rehearsal of Victory parade.
    1 point
  39. I think my favourite Western front moment is when the Nazis pulled some Wimp Lo shit, got their noses bloodied in the battle of the bulge and then decided that it was a tactical victory which slowed down the allied advance.
    1 point
  40. He knows full well he generalized to "Germans" to avoid confronting the fact that the Nazis were perhaps the most mendacious nation to have ever blighted the face of planet earth. What's most amusing is that he sees this as some deft maneuver which he performed on us, instead of an amateur mistake that we're going to absolutely gobble him up for. When we finally do drive him off the forum with his little rat tail between his legs, he'll tell himself he chose to leave because he got bored, but lying to himself won't help then, either.
    1 point
  41. More like killed a bunch of Germans. And encircled German armies. And darkened German skies with long-range aircraft. Reliability and availability (ie: numbers at the fight, on the move, pressing the advantage) are more or less the sina quo non of industrial warfare.
    1 point
  42. So I've seen this image used a whole lot across the internet as an estimate for the proportions of DM53 and I thought I would do my own measurements on it to see how things line up. Disclaimer: I am merely providing my own interpretation of the measurements using the same methodology as whoever originally posted the image. Pixel measuring is an inherently inaccurate measurement tool and very subjective especially on blurry images such as this as people will have different opinions on which pixels can be considered part of the rod and which cannot. I accounted for pixel bleed as b
    1 point
  43. 27 degrees or 27% (15 degrees) gradient? If it’s a 27 degree gradient, that’s actually pretty good. Modern western AFV generally can do 60% (31 degrees), so 35 degrees (70%) is very, very good.
    1 point
  44. 1 point
  45. Maraging steels in general are low carbon, as they do not get their strength from carbon distorting the lattice but rather from metallic precipitates like Ni3Mo. Carbon is in fact not desired in Maraging steels. For the Maraging steel to work properly you need a minimum of 19% Ni, which is very expensive, but you get what you pay for.
    1 point
  46. Lord_James

    Gun Science Library

    “A ceramic armor material database” 1999 https://apps.dtic.mil/sti/pdfs/ADA362926.pdf Collection of a lot of tests and data into one concise document. 10/10, am still reading after 3 days because it’s over 200 pages Ceramics included are silicon carbide, boron carbide, titanium diboride, aluminum nitride, silicon nitride, aluminum oxide (85% pure), aluminum oxide (high purity), tungsten carbide, and soda lime glass.
    1 point
  47. 1 point
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