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A helmet database and a request for help

Article about: OK, here is a snapshot of the spreadsheet ( early stages, it will get fleshed out more ) with the info from my helmets - just to show the info I'm seeking. I have not included half of the on

  1. #21

    Default Re: A helmet database and a request for help

    Thankyou Pablo,
    I DO appreciate the effort - the DIN standard for sheet metal gauges ( Deutsches Institut für Normung ) has metal ranges 1.13mm, 1.25mm, 1.38mm, 1.50mm and 1.75mm. These are the gauges helmets will be found in ( mainly 1.50mm so far ) Unfortunately only calipers can give that level of accuracy.
    If you don't have them, the weight and the dimension side to side ( width ) at the outside edge will help establish a pattern - don't especially buy anything, please!
    Thanks for all you indulgence so far - I hope I can come up with something meaningful.

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  3. #22

    Default Re: A helmet database and a request for help

    Hi Dan,

    Not sure if it'll help because I can only give you some very minimal data, but just in case:

    1. Relic M35 Heer double decal, w/ liner band (and chinstrap loops), maker and size unknown (bubbling and rust obscures the mark), weight: 1066g, dimensions: across bottom 231mm, front-to-back 288mm
    2. Relic M40 Heer SD, no liner or bolts, 3 SMALL holes amounting to a combined 3.376cm2 (not sure if that disqualifies it- but if you can correct for liners and such, a tiny amount like this might be okay), maker again unknown, size: 66, weight:1087g, dimensions: 238mm x 288mm
    Ohhhhh- pillage then burn...

  4. #23

    Default Re: A helmet database and a request for help

    Thanks Matt,
    The side to side measurement tells me the size ( maker dependent ) so that's the only one needed.
    Holes can be difficult to allow for but steel is about 8 gms/cm^3 so I can allow for that in your figures. Again, thanks for your data and with some more I think we may be able to have some meaningful results. I believe I will need about 30 results from each maker of each style and size ( that's 90 x 5 makers = 450 helmets ) but statistically that is the number to draw ANY meaningful conclusions.

    Come on guys, join the weigh-in!

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