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  1. #1
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    Identification Needed for Unknown Aerial Type Bomb

    Inert unknown aerial type bomb. Measures approximately 24 3/4 inches overall length with fuze attached and 22 1/4 inches without fuze. Body is 3 1/2 inches in diameter and fins span 4 1/2 inches in diameter.

    Body is machined steel and tail fin assembly is sheet metal, attached to the body with screws. Color is flat yellow and appears to be vintage.

    Body is marked overall: BS CO. - LOT NO. 2410 - BI4 - BOOST M.1 - K825

    Fuze is marked: C

    Photos attached for additional details.

    Any information related to country, era, nomenclature and any reference material would be greatly appreciated.

    Thanks and stay safe,

    Frank
    "Any Ordnance Items Shown In My Post(s) Have Been Dealt With Accordingly By EOD Personnel"

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    wichitaslumlord (28th November 2018)

  3. #2
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    The fuze has a French air about it.
    That's all I got.
    Better to remain silent and be thought a fool than to speak out and remove all doubt.

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    inertordnance (27th November 2018)

  5. #3
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    BS Co : (US) Bethlehem Steel Corporation

    During WWI and between the two WW, USA manufactured a great lot of bombs on French drawings, first to helped the French aviation and to armed his own Air Force.
    This bomb and this fuze are effectively of French design. Badly, I don't find them in my books.


    Yoda


    Yoda
    Any live or dug ordnance presented by me has been disposed of by EOD technicians.

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  7. #4
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    It looks indeed as a US 17lb Frag MkII from the early 1920s, itself a development (almost identical) of the French "obus de 75mm Michelin" bomb of ww1.

    Here are drawings of the US 17lb MkIIOB on the Left and of Michelin bombs on the right (the 75mm is the second, lower, from the left):
    17lb MkII A.jpg bombes Michelin.jpg

    However there are 3 important variations on this bomb that make it different from the regular model:

    1) the rear part of the fins is angled so as to give a rotation spin impetus during fall
    (I must say that it's the first time I've ever seen a spinning feature on a US bomb model).

    2) Its diameter is wider by 15% than the regular model's (3.5 in instead of 3 in) (Length is compatible with the official data)
    This probably reflects the facts that these bombs were generally made by using reconverted artillery shells - the original ones using a 75mm shell, this one a 88mm shell or more probably a reworked, grounded 90mm shell (I don't think the US artillery ever used 88mm guns, but the 90mm was a "ww1 French classic" together with the 75mm).
    It is worthy to note that the French produced in 1917-18, for the American Expeditionary Forces, 10kg Type P bombs based on reworked 90mm artilley shells (drawing from Deminest).
    Annotation 5 2018-11-27 105640.jpg

    3) the fuze - generally these bombs had a characteristic fuze extension

    The fuze seems to be similar to this one used on French bombs for training during the 1918-1930 period:

    Annotation 0 2018-11-27 092516.jpg

    Asd a matter of fact this fuze was indeed originally a fuze used on 75mm artillery shells:

    Annotation 2 2018-11-27 101515.jpg

    This is what I've got on the 17lb Frag MkII:

    17lb MkII A.jpg 17lb MkII C.jpg 17lb MkII 1.jpg 17lb MkII img208.jpg 17lb MkII fuze and extension img209.jpg17lb MkII img210.jpg
    17lb MkII 47a.jpg 17lb MkII 48.jpg
    Last edited by Dreamk; 27th November 2018 at 10:09 AM.

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  9. #5
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    It looks like a U.S. produced Russian 76.2mm artillery projo converted to bomb.
    ___HAZ/
    _____/ORD Hazardous Ordnance Recognition
    ________Saving Lives Through Education

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  11. #6
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    The French and the Soviet used in the interwar period to systematically re-use discarded Artillery Shells as bodies for Aircraft Frag Bombs - The Soviet AO8 M3, M4 & M6 (76.2mm shells) , the Soviet FAB 50 M4, M5, M6 & M9 (152mm shells), FAB 50 M8 & TR (155mm shell) the French 10kg type P, 50kg type A, etc...

  12. #7
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    Hello,
    Nice US 17lb but the fuze is not correct.
    French 24-31 RY M1917 for artillery or mortar projectiles. Need inertia to be armed so can not work on bombs.

    17lb us.jpgfuze mkXI.jpg

    us bombs.jpg
    Last edited by MINENAZ16; 27th November 2018 at 04:01 PM.
    Any Live or Dug ordnance shown by me has been disposed of by EOD personnel .

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  14. #8
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    Gentleman,

    Thanks Much for the valuable input!

    Stay Safe,

    Frank
    "Any Ordnance Items Shown In My Post(s) Have Been Dealt With Accordingly By EOD Personnel"

 

 

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