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Thread: Sitka Spruce Metirc Size Sources

  1. #1

    Join Date
    Jan 2012
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    Mooresville, NC
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    Sitka Spruce Metirc Size Sources

    We are building a German designed ULF-1 micolift sailplane and have been doing weight comparisons between the metric size spruce indicated on the plans in whole mm and the nearest sizes available in inches here in the US. In most cases we must select sizes slightly larger in inches. This could produce a serious weight penalty for the finished aircraft. Does anyone know a source of metric sized spruce here in the US, or a company that will mill in mm??
    Many thanks, Holliday Obrecht

  2. #2

    Join Date
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    Ft Lost in the Woods MO
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    Just curious, what sizes does it call for?

    I'm having a hard time remembering it, but think there's a Canadian company that custom cuts wood to size. Western Spruce or something along those lines.

    I'd suspect though if you built with the bigger US sizes, the weight differential would probably not be that much- I'd suspect in the neighborhood of 5 lbs.

  3. #3

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    David, typical sizes called for are mostly sitcks, e.g. 7 x 6, 6 x 5, 6 x 3 mm, etc.
    Holliday

  4. #4
    My business uses Sitka Spruce for a special project. If you email me a cutlist, we can give you a quote.
    Dan@valleywoodcraft.com

    Dan Malone

  5. #5
    steveinindy's Avatar
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    Quote Originally Posted by Holliday Obrecht View Post
    David, typical sizes called for are mostly sitcks, e.g. 7 x 6, 6 x 5, 6 x 3 mm, etc.
    Holliday
    Millimeters or centimeters?
    Unfortunately in science what you believe is irrelevant.

    "I'm an old-fashioned Southern Gentleman. Which means I can be a cast-iron son-of-a-***** when I want to be."- Robert A. Heinlein.



  6. #6

    Join Date
    Nov 2011
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    Broughshane, Northern Ireland
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    Metric Size for Sitka Spruce

    Most woodworking/cabinet maker type shops will have a parallel sander - may not be the name of it, but it is a large piece of kit that will sand, single, multiple, or very wide sheets of material to whatever thickness you need.
    If you are concerned about the weight - and not the cost of turning that lovely Spruce into sawdust, I am sure you could have the imperial measurements sanded down to the metric size.

    I agree with the other reply you got that the difference in weight will be small - an Excel spreadsheet with all the pieces listed will soon tell you the exact theo weight difference between the 2 mesurement systems.
    Without a doubt - the metric system is a whole lot easier to use!!

    Good luck, happy sanding!!

    Mark B.

  7. #7

    Join Date
    Aug 2011
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    1
    I might be a little late to help but Wicks Aircraft will supply metric sizes of spruce. I get all my spruce from them cut to metric sizes to save on the sawdust in my shop.

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