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Walter_Sobchak

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Everything posted by Walter_Sobchak

  1. Walter_Sobchak
  2. Walter_Sobchak
    Video about Somali tank program. https://www.liveleak.com/view?t=CNL5i_1547031966
  3. Walter_Sobchak
    Great review!
  4. Walter_Sobchak
    So they used to a fake T-34 to play the role of the German tank...
  5. Walter_Sobchak
    Where did they get a T-34/76? If they used a T-34/85, I would not have been surprised, those are easily available. I didn't think there were many T-34/76 tanks around in running condition.
  6. Walter_Sobchak
    A couple summers ago I had a chance to get inside an M113 and I have to say, I am not sure it was intended for human crewmen.
  7. Walter_Sobchak
    Makes sense to me, especially since there is plenty of upgrade technology already available for the M113.
  8. Walter_Sobchak
    Are you suggesting that we may be entering the era of the robot-Gavin? I'm all for it.
  9. Walter_Sobchak
    Since the old MBT-70 design had no human driver in the hull, that vehicle might be a good benchmark for how low the hull of a crewless tank could be built. Of course, with modern hull designs having the driver almost laying on his back, the height of the powerpack is probably a bigger issue in terms of hull height than accommodating the human driver.
  10. Walter_Sobchak
    Robot tank! Sorry, I couldn't help myself.
  11. Walter_Sobchak
    As I understand it, the T-14 Armata is supposed to have a crewless option, or at least the capability to be converted into such a configuration in the future. Although, that seems less efficient than a true robot tank since there is still the space taken up for the crew compartment. I suppose they could repurpose that space for a crewless version.
  12. Walter_Sobchak
    That tread is pretty damn funny. I guess they don't realize that here at SH we make fun of just about everything, including each other.
  13. Walter_Sobchak
    The best use of some old Sherman tanks for a small army would be to keep them in a separate unit with WWII accurate markings for the purpose of renting them out to Hollywood for WWII films.
  14. Walter_Sobchak
    When I was at the Russell Military Museum in Zion Illinois a couple years ago, I was talking to the museum owner about Sherman tanks. He said it's really easy to stall out an Isherman with the Cummins diesel when turning. He owns one, so I expect he is talking from experience. His rationale was that it had something to do with how the lower RPM diesel interacted with the transmission. Not sure I understood it to be honest.
  15. Walter_Sobchak
    I would think so. So many different engines were used in the M4 that it's reasonable to assume that a new engine could be installed without too much trouble. Israel put a Cummins diesel into the Sherman, although I can't find any information on which particular model of Cummins they used other than it was 460 HP. The Cummins VTA-903T used in the Bradley family of vehicles would be my guess as to which modern engine to use in an upgrade since it's a proven performer and still in production. Looking at the engine dimension figures, it seems pretty comparable with other Sherman engines in terms of size VTA-903t dimensions 1148mm length, 1011mm width, 1288mm height Ford GAA dimensions 1499mm length, 845mm width, 1214mm height Continental R975 1092mm length, 1143mm diameter
  16. Walter_Sobchak
    Low pressure equals low recoil. Which means it can be mounted on a vehicle that is lighter than a standard main battle tank. The disadvantage is that a low pressure gun is also low muzzle velocity, which limits it to HEAT style anti-tank rounds.
  17. Walter_Sobchak
    If I am remembering correctly, the Israeli's tried putting a 105mm L7 gun and the turret could not withstand the recoil. So they went with the French 105mm gun instead with a special low power shell to reduce recoil. The system on the Stryker is an external gun system which allows for a very long recoil, something that the small size of a Sherman turret would not be able to accomodate. As to the main question, I think one important factor is "which version of the Sherman are we starting with?" An easy eight is going to have a lot more upgrade potential than an early M4A1 with 75mm gun turret.
  18. Walter_Sobchak
    Not the best quality picture, but proof that Santa traded his sled for a M46 Patton.
  19. Walter_Sobchak
    It was, they just made some mistakes. The Teledyne Continental engine nomenclature was widely known at that point. Heck, the basic AVDS-1790 went into service in 1960. Hunnicutt's book on the Patton series of tanks was published in 1984, so they really don't have an excuse.
  20. Walter_Sobchak
    Not to be fussy or anything, but there are some errors in this text. It should read "AVCR-1790 diesel engine, not "AVCT-1790." AVCR stands for Aircooled, variable compression piston. Also, where it says "AVCT-1790", it should say "AVDS-1790". AVDS stands for Air-cooled Vee configuration Diesel Supercharged. Also, while I know about the Teledyne Continental "Super M60" program, I have never heard of the "General Dynamics High Performance M60 MBT project." General Dynamics had zero interest in upgrading the M60 and really disliked the fact that Teledyne Continental had created the Super-60 because it was considered unwelcome competition to General Dynamics Abrams tank in the time period addressed in the book. Anyhow, the AVCR-1790 took the variable compression ratio technology developed for the ill fated AVCR-1360 engine of the MBT-70 and General Motors rejected XM-1 prototype and applied it to the older AVDS-1790 engine of the M60 series. The introduction of VCR to the 1790 got the engine up to 1200 HP, although from what I understand, the prototype suffered a pretty serious failure during testing in South Korea. Teledyne abandoned the AVCR-1790, replacing it with the AVDS-1790-9, which achieved 1200HP by introducing aftercoolers to the turbochargers with conventional pistons. Incidentally, Teledyne Continental promotional materials for the Super M60 list either engine, depending on what date they were published. The AVDS-1790-9 would go on to see service in the Israeli Merkava III and the Namer APC.
  21. Walter_Sobchak
    Are those real photos of Herr Speer in a Sherman tank?
  22. Walter_Sobchak
    Defying Trump, US Senate votes to end US support for Yemen war https://www.aljazeera.com/news/2018/12/defying-trump-senate-approves-yemen-resolution-181213201629972.html
  23. Walter_Sobchak
    Something for @Toxn
  24. Walter_Sobchak
  25. Walter_Sobchak
    Somewhat surprisingly, I think this is one of the best of the Tank Museum Top five videos and one of the best videos that Richard "The Challenger" Cutland has done. Probably because he is speaking about his personal experiences with these vehicles in the video.
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