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Thread: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

  1. #1
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    Default British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    Hi guys

    Can anyone tell me the differences between the British/Canadian 6 pdr gun and US M1 57mm AT-Gun ?

    Anybody got any never seen before ( I.E. not from Wikipedia) in action photos?

    Cheers

    Martyn

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  3. #2
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    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    Rob Nixon is your man, he has both.
    Tanks are mighty fine things
    1939 Caterpillar D4
    1944 M5 High speed tractor
    1953 M75 APC
    1942 M4A4 Sherman
    1978 Can-Am Bombardier
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  4. #3
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    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    The most obviouse differences between the 6 pdr and the 57mm lay in the carriages,although the 57mm's trail is similar to the 6 pdr it has several Yank additions such as the perch eye being changed for the standard American lunette,jocky wheel and the swinging axle stands which all adds to the weight of the gun I might add.
    The 6 pdr also went through several changes throughout the war years with several variations in barrels and the addition of secondary armour,I am currently coming to the end of a two year restoration ( on and off !) of my 6 pdr which will join the 57mm gun in my collection.And credit to Adrian B for his expert assistance in the final phase.
    I have a very large library of pictures so I will sort through and post some but for now here are some of the 57mm gun.

    Rob...................rnixartillery
    Attached Thumbnails Attached Thumbnails DSCF3555.jpg  

    DSCF3538.jpg  

    DSCF3532.jpg  

    Last edited by rnixartillery; 15-12-2011 at 17:01.

  5. #4
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    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    Quote Originally Posted by rnixartillery View Post
    I am currently coming to the end of a two year restoration ( on and off !) of my 6 pdr which will join the 57mm gun in my collection.And credit to Adrian B for his expert assistance in the final faze.
    I have a very large library of pictures so I will sort through and post some but for now here are some of the 57mm gun.
    Hi Rob

    I'm watching your build with great interest. Kudos to you mate a great job.

    I look forward to seeing more pictures; do you have any period/in action ones?

    Cheers

    Smudge

    PS; I used to spend a lot of time at Catterick shame I still don't

  6. #5
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    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    As promised some realy good action shots.

    Rob....................rnixartillery.
    Attached Thumbnails Attached Thumbnails l1.jpg  

    l2.jpg  

    6pdr_apds0001.jpg  


  7. #6
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    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    Did the 6 pounder have a semi auto brech selection like the 2 pounder?
    Leading the charge!
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  8. #7
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    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    That last shot with the APDS going in, is that a block lifting eye? I didn't realise that was a period fitting, presumably late war?
    Tanks are mighty fine things
    1939 Caterpillar D4
    1944 M5 High speed tractor
    1953 M75 APC
    1942 M4A4 Sherman
    1978 Can-Am Bombardier
    1943 Matchless G3/L

  9. #8
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    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    Quote Originally Posted by Tony B View Post
    Did the 6 pounder have a semi auto brech selection like the 2 pounder?
    Quite correct Tony,The 6pdr does have a semi auto selector like the 2 pdr.

    Quote Originally Posted by Adrian Barrell View Post
    That last shot with the APDS going in, is that a block lifting eye? I didn't realise that was a period fitting, presumably late war?
    I have seen a 2 pdr with this eye attached !



    Rob...........rnixartillery
    Attached Thumbnails Attached Thumbnails 6pdrhe.jpg  

    l3.jpg  

    l5.jpg  


  10. #9

    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    As well as different wheels etc that you can see, I thought that there was a more subtle difference between the 6pdr and the 57 mm? I am reaching 40+ years back but I think that British engineering practice is "hole" based but American is "shaft" based. It is difficult to explain in a few words but if you take as an example, the breech operating shaft and its bearings. Lets say it is nominally 2 inches in diameter and has 2 thou manufacturing tolerances and 5 thou minimum operating clearance.

    British practice would be a hole that is 2" to 2.002 inches, the shaft would be 1.993 to 1.995 inches so running clearance would be from 5 to 9 thou.
    American practice would be to have a shaft of 2 to 2.002 inches and a hole from 2.007 to 2.009, again giving 5 to 9 thou. Unfortunately, the American shaft will not fit into the British hole at all and the British shaft would have up to 16 thou of slop in the fitting if put into a US hole
    .
    The British thought a "hole" standard was best as holes are made by accurately manufactured drills, then you make the shaft to fit, the US practice seems to think it is easier to turn the shaft to size, then ream the hole out to fit. You takes your money and makes your choice - doesn't matter so long as the whole item is made to the same standards!

  11. #10
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    Default Re: British / Canadian 6 pdr gun vs US M1 57mm AT-Gun

    You missed out the fact that 57mm Anti-tank guns were built using UNC and UNF thread fixings rather than BSW and BSF fixings on the 6 pdr !

    There is a great deal of differences between the two Guns if you delve into the subject.


    Rob.....................rnixartillery.

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