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  1. #21
    gargoyle's Avatar
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    One thing I noticed with the five styles of baffle designs, is which gives the most loft for given material. The box baffle seems to be the design of choice for most quilt builders. And I feel it gives the most loft, while using the least amount of material.

    Where weight is a critical component of hiking gear, adding additional layers of fabric would an absolute no-no. It may weigh a few oz. more than another style. And the added cost of additional layers of fabric.
    Sewn thru uses the least material, but would have cold spots where the seams are, since there won't be any insulating material at these points.

    The box baffle seems to be the best of both worlds.
    And one of the easier designs.

    Karo step is another technique, that should be included as an example.
    Ambulo tua ambulo.

  2. #22
    Walking Dead's Avatar
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    Quote Originally Posted by gargoyle View Post
    Karo step is another technique, that should be included as an example.
    I would really love to see the karo step as a diagram. I watched the video and it made no sense.

  3. #23
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    CAD-Doodling

    Bradley, here is a representation of the box baffles as used by (I believe) most of the UQ folks. This means that the inner fabric is narrower than the outer, keeping the down thickness constant.

    Jim
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  4. #24
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    Making a differential cut with offset (or Z) baffles is no more difficult really. It is a matter of doing the same math but constructing it slightly differently. The depth of the loft is inferred by an imaginary line from the stitch line to the opposite side rather than a direct measurement of the baffle fabric.
    I may be slow... But I sure am gimpy.

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  5. #25
    gargoyle's Avatar
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    Think of it as a checkerboard/grid pattern where a portion of each square is missing. The pattern is the same on the top and bottom layer of quilt fabric, with the netting/baffle material holding the down in place.
    Each row is staggered to create small boxes with partially open sides. Which, if you look at it right, look like stairsteps, hence the name "step quilt".

    The partially open sides allows the builder to insert and shift the down. Once filled, the down basically rides in its own box, with minimal migration from box to box.

    best I can do, not a graphics guy...hopefully the picture helps. along with my feeble explanation.
    Ambulo tua ambulo.

  6. #26
    Senior Member Bradley's Avatar
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    How would one go about sewing a Box type ???

    Bradley SaintJohn
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  7. #27
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    My sleeping bag has trapezoidal baffles. I assumed that this was the best way. It has the advantages of the z baffles, but with less baffle fabric.
    Am I missing something? (I usually do)
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