Collimatrix Posted April 10, 2015 Report Share Posted April 10, 2015 On the debit side, merk IV has very thick roof armor: Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted April 10, 2015 Report Share Posted April 10, 2015 Commander's hatch is 400 mm thick, as one Israeli comrade from Rafael said to me. He also noted that it is not simple steel, filler was designed with EFPs in mind. Quote Link to comment Share on other sites More sharing options...
Collimatrix Posted April 10, 2015 Report Share Posted April 10, 2015 Hatch look maybe 800mm wide or so. 40 * pi * 40^2 * 7.8 gm/cm^3... That hatch would mass a little over 1.5 tonnes if it were solid steel! Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted April 10, 2015 Report Share Posted April 10, 2015 Compare it to actual human head: They use special electrical motor to open/close it. Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted April 15, 2015 Report Share Posted April 15, 2015 Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted April 15, 2015 Report Share Posted April 15, 2015 Merkava 4 frontal part. Note LFP. I hope they have armor inserts between that and engine. Quote Link to comment Share on other sites More sharing options...
Walter_Sobchak Posted April 17, 2015 Report Share Posted April 17, 2015 Compare it to actual human head: I use that sentence all the time in a variety of contexts. LoooSeR and Xlucine 2 Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted May 13, 2015 Report Share Posted May 13, 2015 http://www.youtube.com/watch?t=52&v=C3NVLwr3G28 Collimatrix 1 Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted May 18, 2015 Report Share Posted May 18, 2015 Why tanks need close-observation cameras. From minute 2 you can see a bizarre circus. Tank crew can't see militants, militants can't damage tank seriosly, spotter is screaming on radio about militants running around, and all that was happening for ~30 minute (video was edited to cut time). Quote Link to comment Share on other sites More sharing options...
Life_In_Black Posted May 18, 2015 Author Report Share Posted May 18, 2015 Israeli tank photos (link originally posted by guy on WoT forums); https://picasaweb.google.com/harabecw/Tanks Some interesting stuff there. Like the information plate for the M-51: How on earth did they stuff 55 105mm rounds into a Sherman and keep a 5 man crew? Merkava 4 frontal part. Note LFP. I hope they have armor inserts between that and engine. Near as I can tell having looked at various pictures and what I could find, the only thing filling that space is the armored fuel tanks filled with diesel. More pictures here. I honestly don't think that's changed at all from the Mk. 1 up through now. Could really use someone who's good at this sort of thing to chime in at how good diesel is at stopping tank rounds. LoooSeR 1 Quote Link to comment Share on other sites More sharing options...
Marsh Posted May 19, 2015 Report Share Posted May 19, 2015 Hi, A diesel fuel cell 7cm thick, will offer roughly 1cm protection equivalent of RHA against HEAT and slightly less against KE penetrators. i have visited the production line for Merkava III when it was active, Merkava !V and the Namer. You are somewhat underestimating the protection of the tanks and are missing something. For obvious reasons I am not prepared to discuss this factor any further. Cheers Marsh Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted May 19, 2015 Report Share Posted May 19, 2015 Nakpadon. Frontal door Quote Link to comment Share on other sites More sharing options...
Walter_Sobchak Posted May 19, 2015 Report Share Posted May 19, 2015 I like that picture of the engine bay for the Namer. I was wondering how they fit an AVDS-1790 into that vehicle while maintaining the Merkava four front armor shape (no bulge for the engine like on Merkava 1 - 3). Quote Link to comment Share on other sites More sharing options...
Walter_Sobchak Posted May 19, 2015 Report Share Posted May 19, 2015 A while back I had posted an old article from ARMOR magazine by Ogorkiewicz on the Merkava II. Ogorkiewicz seems to think rather highly of the vehicle. In his latest book he lists General Tal as one of his professional acquaintances. When I was a young lad, the Merkava was one of the first plastic model kits I had. My dad got me the kit, he was all excited about the Merkava since Israel was one of Continental Motors biggest customers. After the US Army decided to go with a gas turbine for the M1, Israel's continued use of the AVDS-1790 became very important to keeping the engine plant in business. I remember my dad invited an Israeli Colonel and Major over for dinner once. I was too young to ask any intelligent questions. Still, it was a bit out of the ordinary for us to have dinner guests with personal stories of the Yom Kipper war. Jeeps_Guns_Tanks 1 Quote Link to comment Share on other sites More sharing options...
Marsh Posted May 19, 2015 Report Share Posted May 19, 2015 Nakpadon. Frontal door Only a handful of Nakpadons were produced with that configuration. For a very specific purpose. It's still OPSEC, but I am sure you can figure it out easily enough. Quote Link to comment Share on other sites More sharing options...
Collimatrix Posted May 19, 2015 Report Share Posted May 19, 2015 More pictures here. I honestly don't think that's changed at all from the Mk. 1 up through now. Could really use someone who's good at this sort of thing to chime in at how good diesel is at stopping tank rounds. Last I'd read, raw diesel fuel is a little less effective than steel vs. shaped charges on a mass basis. However, there are supposed to be some sort of integrated spaced armor/fuel tank designs that can raise this figure dramatically, at least against HEAT threats. Quote Link to comment Share on other sites More sharing options...
Xlucine Posted May 19, 2015 Report Share Posted May 19, 2015 With a TE of 7 (per marsh) then diesel has a ME of about 1.3 Vs shaped charges, ignoring mass for the container. rho for diesel is only ~10% rho steel Quote Link to comment Share on other sites More sharing options...
Collimatrix Posted May 20, 2015 Report Share Posted May 20, 2015 With a TE of 7 What Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted May 20, 2015 Report Share Posted May 20, 2015 What I think Xlu is drunk or physicist. He says things that nobody understand. Quote Link to comment Share on other sites More sharing options...
LostCosmonaut Posted May 20, 2015 Report Share Posted May 20, 2015 I think TE = thickness efficiency, ME = mass efficiency. Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted May 20, 2015 Report Share Posted May 20, 2015 Merkava Siman 3 Bet baz dor Dalet (yes, i used full name just because ) Part of UFP is visible. Second Merkava have satellite dish and can receive over 500 TV channels! Quote Link to comment Share on other sites More sharing options...
Collimatrix Posted May 20, 2015 Report Share Posted May 20, 2015 I think TE = thickness efficiency, ME = mass efficiency. Yes, and I've usually seen these numbers quoted as a ratio to RHA. Nothing has a TE of 7. Xlucine has got to be using a different baseline. Quote Link to comment Share on other sites More sharing options...
LostCosmonaut Posted May 20, 2015 Report Share Posted May 20, 2015 It might be inverse for some reason (so diesel is 1/7 as efficient as RHA). Quote Link to comment Share on other sites More sharing options...
Xlucine Posted May 20, 2015 Report Share Posted May 20, 2015 I should have written 1/7th. Embarrassingly, I wasn't drunk at the time Quote Link to comment Share on other sites More sharing options...
T___A Posted May 20, 2015 Report Share Posted May 20, 2015 Don't worry, drowning in pussy is a valid excuse. Life_In_Black, Sturgeon and Belesarius 3 Quote Link to comment Share on other sites More sharing options...
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