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...
Type: Posts; User: gsbaker
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...
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.
...
I have a good idea where it came from: http://www.forthepeople.com/
:)
I've heard that's their most popular option.
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...
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...
Design change? No.
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...
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...
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.
With respect to lateral protection:
http://www.isaacdirect.com/images/TestGraphs/Chart10.GIF
and,
http://www.isaacdirect.com/images/TestGraphs/Chart9.GIF
I wasn't aware of that. Thanks for the education.
Bingo.
They idea that that manufacturer's designs are structurally lacking is amusing.
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...
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...
Quick release is standard. The Isaac uses positive lock, quick release pins, and the new Link has QR snap shackles.
None of those results are published or otherwise verified.
Jim,
What is "Quick Disconnect for Fixed Tethers" in column three? Apparently we sell them for $85-$95.
Nice work, Jim. Thanks for putting this together.
Thanks for helping us understand all those details.
Gotta keep the ad buyers happy.
Are they an advertiser?
Not to mention "Ease of egress..." as the #1 consideration. Folks have figured this out, hence SFI's low rating.
Just wanted to say it. Have fun and be safe out there! :)
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...