ppuinn

Pekin Spiral Helix

Subroadbed is 1/2" homasote only, instead of homasote plus 1/2" OSB (wafer board). Loop is only 1 inch wide instead of 1.5 inches wide as on the other helixes. 16 supports were used to maintain stability instead of just 8 that were sufficient on the Bartonville, Kellar, and Peoria helixes which used both the homasote and OSB for the subroadbed.

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Pekin Spiral Helix
ppuinn, Jun 4, 2006
sd90ns likes this.
    • FriscoCharlie
      Interesting photo to look at.

      Charlie
      Jun 4, 2006
    • Stourbridge Lion
      Given the stair step braces, how tight is the widest and narrowest radius of these curves.

      [​IMG] [​IMG] [​IMG] [​IMG]
      ​
      Jun 5, 2006
    • SteamDonkey74
      Dave, now you have me thinking about a helix again. I didn't want to do the standard stacked helix with the threaded rods, etc., because it just seemed like a lot of fiddling. I like this one here.
      Jun 16, 2011
    • sd90ns
      Decreasing radius turns; the bane of motorcyclists everywhere!
      May 13, 2021
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  • Album:
    Helix Pics
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    ppuinn
    Date:
    Jun 4, 2006
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