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whelm

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  1. yup even 1/4 an inch helped against the PIAT There was another British test for "future" tanks with a few varying thickness up to 1 inch skirts and various hull sides and if I recall it made quite a difference. I imagine the M6 heavy for example with it's 1 inch skirt must have helped immensely in firing trials.
  2. Logan, which was used in the M3 and Ram, some early M4's had it afaik. It had problems.
  3. Some excellent new photos from 8Hussar's photobucket on the Gun Ram at the CWM. http://s661.photobucket.com/user/8Hussar/library/?sort=2&page=1 Uploaded the turret+gun mount ones to imgur due to photobucket being a royal pain in the arse in general. Album https://imgur.com/a/JpHAxql
  4. good report on that at least in regards to ammo. http://www.dtic.mil/dtic/tr/fulltext/u2/a136625.pdf
  5. Small report on the Cletrac during WW2 https://imgur.com/a/WLZEpwm
  6. Taking known dimensions from primary sources on the Ram OP and regular Ram I + II to come up with numbers. Hull height is to the highest point at the turret ring, Turret height is to top of periscope over cupola and top of periscope on turret roof. No idea on actual roof height but you could probably make a rough estimation using the known heights, the photo with the turret removed and the measurements from the suspension. Hull width is the side hull cast in bulges, versions with the door in place are wider still. You can see in the photo how the actual overall width is lower everywhere else on the hull. Question remains if they had measured to the older style periscopes or the newer taller ones.
  7. Kangaroo with what looks like an engine change or some sort of major mod. exhaust soot on the rear upper plate, and what looks like the two exhausts sticking out of the rear engine deck plate. Only thing I can think of is an engine change to something like the Fords who's exhaust normally comes right out the lower rear plate on the M4A3, so instead of cutting 1.5 inches of steel to make an opening, they just piped it up and out of the engine cover. Edit: Turns out that exhaust mod was done specifically to Ram towers only it seems, I suppose for clearance issues or wadding requirements?
  8. Wartime censorship in action. And the unedited version
  9. It's next to impossible to find images of the gun + front adapter assembly dismounted from the tank, but one of the videos Canada at war had this scene.
  10. Same reason the Ram I had the 2 pdr, no tank mounting existed for the 6 pdr. Canada's waiting on the UK who say they are working on it but it's not materializing so they go ahead and design their own. Australia wants the 6 pdr in their tank so they ask Canada for drawings to see how they manged it.
  11. Yes they are nice stowage diagrams, I had paid to have two different 6 pdr mounting part lists scanned at the Aussie archives and they host everything like that after on their site which is nice. Bonus was the stowage stuff included in the papers. they are nice for layering as well to compare and get a idea on rough slope for the different sections (in front of driver and cupola)
  12. Well those french drawings show 1950 mm for what I assume is just the size of the cut opening on hull top. Canada had the M4's outside diameter of the turret ring as 2051 mm, the inside diameter of the ring is listed as 1752.6 mm. I can only assume that is being measured from before the ring is installed and then when the ring and all the mounting equipment is installed, it also may be factoring in that 65 mm extra for the bolt down area, but I'm unsure on that. I don't have many Sherman photos with the turret off showing the turret ring installed so using the Ram as an example. Using 8Haussars photos from the war museum. Turret ring listed as having a 1832 mm lower outside diameter, and a 1537 mm upper inside diameter. You can see quite well on the third photo just how much space is eaten up by it's turret ring design.
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