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  1. Replies
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    The two are mutually exclusive. The SFI spec is...

    The two are mutually exclusive. The SFI spec is low performance; it is the equivalent to putting a propeller on a jet engine. All the data proves it. We would have to detune our design to meet...
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    We heard that too, but we also heard from...

    We heard that too, but we also heard from witnesses that there may have been an egress issue once he stopped. This is all second-hand info at best, so it doesn't help the discussion.
    ...
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    I have a good idea where it came from:...

    I have a good idea where it came from: http://www.forthepeople.com/

    :)
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    I've heard that's their most popular option.

    I've heard that's their most popular option.
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    It's important to keep in mind the original...

    It's important to keep in mind the original intent of this old single release rule. Written at a time when there was very little safety equipment in the car -- no side nets, winged seats or H&N...
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    Two recommendations, depending on your situation:...

    Two recommendations, depending on your situation:

    1) If you want maximum safety (including egress) and you intend to keep everything until old age puts you in a nursing home, get a high quality...
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    Design change? No.

    Design change? No.
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    The SCCA made two completely opposite rulings on...

    The SCCA made two completely opposite rulings on the subject in 2009 (same people, same issue, different outcomes), with the latest not going into effect until 2012. It's a pretty good guess that...
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    If you don't like ours you're gonna hate the HANS...

    If you don't like ours you're gonna hate the HANS (it has higher loads to the neck, i.e. adds loads).

    Any driver safety "system" is a collection of building blocks. Once a cage and seat are in...
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    In 20+ years dealing with biomechanics I don't...

    In 20+ years dealing with biomechanics I don't believe I've ever seen so many misconceptions compressed into one paragraph.

    Please read Melvin, Hubbard, Trammel et al.
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    With respect to lateral protection: ...

    With respect to lateral protection:

    http://www.isaacdirect.com/images/TestGraphs/Chart10.GIF

    and,

    http://www.isaacdirect.com/images/TestGraphs/Chart9.GIF
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    I wasn't aware of that. Thanks for the education.

    I wasn't aware of that. Thanks for the education.
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    Bingo. They idea that that manufacturer's...

    Bingo.

    They idea that that manufacturer's designs are structurally lacking is amusing.
  14. Thread: safety speech

    by gsbaker
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    The key is controlling lateral motion at the...

    The key is controlling lateral motion at the shoulders. Once that's accomplished most of the problems are solved if the H&N restrain has good lateral numbers. Watch the rear-view mirror for head...
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    When the insurance carriers are made aware that...

    When the insurance carriers are made aware that SFI excludes superior designs they fall back on, "We just want no injuries," and find RSI certification completely acceptable.

    If a mandate is put...
  16. Thread: HNR Survey

    by gsbaker
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    Quick release is standard. The Isaac uses...

    Quick release is standard. The Isaac uses positive lock, quick release pins, and the new Link has QR snap shackles.
  17. Thread: HNR Survey

    by gsbaker
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    None of those results are published or otherwise...

    None of those results are published or otherwise verified.
  18. Thread: HNR Survey

    by gsbaker
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    Jim, What is "Quick Disconnect for Fixed...

    Jim,

    What is "Quick Disconnect for Fixed Tethers" in column three? Apparently we sell them for $85-$95.
  19. Thread: HNR Survey

    by gsbaker
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    Nice work, Jim. Thanks for putting this together.

    Nice work, Jim. Thanks for putting this together.
  20. Thread: HNR Survey

    by gsbaker
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    Thanks for helping us understand all those...

    Thanks for helping us understand all those details.
  21. Thread: HNR Survey

    by gsbaker
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    Gotta keep the ad buyers happy.

    Gotta keep the ad buyers happy.
  22. Thread: HNR Survey

    by gsbaker
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    Are they an advertiser?

    Are they an advertiser?
  23. Thread: HNR Survey

    by gsbaker
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    Not to mention "Ease of egress..." as the #1...

    Not to mention "Ease of egress..." as the #1 consideration. Folks have figured this out, hence SFI's low rating.
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    Happy Holidays everyone!

    Just wanted to say it. Have fun and be safe out there! :)
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    Well put. Nevertheless, there is value in...

    Well put. Nevertheless, there is value in underlining the importance of egress, which is why some have suggested a subjective measure, e.g at the annual inspection the driver demonstrate that they...
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