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  1. #261
    Join Date
    Nov 2014
    Location
    Kuwait
    Posts
    653
    Country: Kuwait

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    One thing I never understood on those old heavy Tanns is in the boltwork. Why did they have the locks operating live AEDS, but without an actual interference point with the bolt?

    I am sure there must have been a reason if Tann did it, but what is the reason?

  2. #262
    Join Date
    Sep 2007
    Location
    Aberdeenshire
    Posts
    417
    Country: Great Britain

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    Quote Originally Posted by Chubby View Post
    One thing I never understood on those old heavy Tanns is in the boltwork. Why did they have the locks operating live AEDS, but without an actual interference point with the bolt?

    I am sure there must have been a reason if Tann did it, but what is the reason?
    Chubby, I was not until about 1980 privvy to the design thinking in Tanns but there could be a clue in that the first boltwork designs in Stratford and leading through to Tann, used the lock solely as a servo mechanism for the live re-locker and not necessarily in it's own right.

    The reasoning as I see it is that at the time explosive attack was at it's height and when the lock is blown anything in the proximity is also likely to suffer so the re-locker placed some distance away and more firmly attached to the door plate than the flimsy lock bolts is more likely to survive.

    The Tann locking changed by the 1980's in the TS ranges where the live re-locker was placed well above and out of danger working in conjunction with the keylock which was also active in the bolt plate.

  3. #263
    Join Date
    Nov 2014
    Location
    Kuwait
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    653
    Country: Kuwait

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    It's interesting to hear that.

    Of course some Stratford AEDs were set very close to the lock- I am thinking of the little see saw live AEDs.

    I am a big believer in long drives for AEDs putting them well away from the main action.

  4. #264
    Join Date
    Aug 2013
    Posts
    1,453
    Country: Wales

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    For anyone interested in the monster crane hinged Giant Colossus i posted a while back, heres an elusive front view I found while having a big clear out of old stored photos.
    Would still like to know for definite if these units ever went into production..
    Click image for larger version. 

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    Huw

  5. #265
    Join Date
    Sep 2004
    Location
    Devon UK
    Posts
    3,022
    Country: UK

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    Quote Originally Posted by Huw Eastwood View Post
    For anyone interested in the monster crane hinged Giant Colossus i posted a while back, heres an elusive front view I found while having a big clear out of old stored photos.
    Would still like to know for definite if these units ever went into production..
    Click image for larger version. 

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    It is only 2.5 tonnes - would it really have matched vaults, as they claim?

  6. #266
    Join Date
    Feb 2014
    Posts
    157
    Country: Great Britain

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    The stated weight, as mentioned before by myself and others, doesnt seem right ? 2.5 metric tonnes ! the door looks that heavy !

  7. #267
    Join Date
    Feb 2015
    Posts
    22
    Country: New Zealand

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    I would say that 2500kg for a 185 litre internal capacity safe was pretty good. Looking at its dimensions, the safe is physically not that big.

  8. #268
    Join Date
    Aug 2013
    Posts
    1,453
    Country: Wales

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    Quote Originally Posted by Redoubt View Post
    I would say that 2500kg for a 185 litre internal capacity safe was pretty good. Looking at its dimensions, the safe is physically not that big.
    Have to agree with Redoubt, at less than 4 foot tall but weighing 2.5 tons the Colossus is hardly a lightweight

    Quote Originally Posted by Safeone View Post
    The stated weight, as mentioned before by myself and others, doesnt seem right ? 2.5 metric tonnes ! the door looks that heavy !
    Why? The entire safe is less than 4 foot tall with 6 inch walls and weighs 2.5 tons?

    Quote Originally Posted by Tom Gordon View Post
    It is only 2.5 tonnes - would it really have matched vaults, as they claim?
    I'm guessing it was horses for courses Tom, in that any formidable unit (Chubb, Tann, Fichet SLS,etc) with 6 inch walls of the toughest barrier is capable of competing as an alternative to a vault, but it would have to be realistic and comparable. Most likely typical 3.5 or 4 inch Bank 'Branch doors' was probably their intention, and not 33 inch Chubb Treasury's with a 2 foot thick slab of TDR like you're probably thinking!
    Huw

  9. #269
    Join Date
    Nov 2014
    Location
    Kuwait
    Posts
    653
    Country: Kuwait

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    The external dimensions equate to 813 litres. So if the internal volume is 185 litres, you have 628 litres of body. Now the assumption that the free space inside the back of the door more or less equals the volume of the external fittings- crane hinges etc- is necessarily inaccurate, but probably not too far from the truth, that gives a specific gravity of around 4 for the carcass. That is heavier than concrete but not approaching that of a hard alloy steel.

  10. #270
    Join Date
    Aug 2013
    Posts
    1,453
    Country: Wales

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    The cast inner door slab and bell casting for the body was more than likely an Aluminium alloy, most used it because of the weight and expense issues of Copper and Stainless steels, and ally is still a pretty good conductor of heat.
    Most also incorporated copper and stainless layers in the defences, but with Aluminium door slabs and bell castings, often poured as 'Aluramic' castings with random ceramic inserts in the mix which remained unaffected by the high temperatures of the molten alloy. Plus you notice they use the 'Cerastra' name for it.

    I mentioned before I'd noticed a similarity of certain features of the Colossus with Bischoff's top models, and from memory I think they also used Aluramic castings on their TRTL30x6 units.
    Huw

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