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4 people online in the last 15 minutes - 0 members, 0 anon and 4 guests. (Most ever was 25 at 02:03:53 Tue Aug 21 2012) |
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808M3 01:07:02 Wed Feb 10 2010 Offline 8 posts Newbie Reply |
Hi All,
The rules state that harnesses must have a 3 inch lap belt. I have been researching the subject prior to making my purchase and I have found some interesting information on the subject. According to Schroth a 2" lap belt is actually a safer design. Please read the info below which was copied from their website and let me know if the subject/rules are open for discussion. John 'To explain why 2” webbing is more effective than 3” webbing, one needs to look at the shape of the human body. The Iliac Crest is the part of the pelvic bone that sticks out above the hips. 2” webbing fits entirely within that crest, where 3” webbing rides over the tips of the crest. The 3” webbing has less surface area by percentage than the 2” webbing which will cause more bruising on impact as “hot-spots” of force develop where the belt is making contact with the pelvic bone. Since the 2” webbing rides inside the crest it can be worn as much as 1” to 2” tighter and at the same time is more comfortable. Since the 2” webbing fits well within the Iliac Crest of the pelvis, it is less likely to slide up above the crest and cause submarining – a condition where the body slides down below the lap belt possibly causing internal organ damage. Research shows that the faster the pelvis is captured, the lower the resultant loads on the chest, head, and neck. There is no difference in the strength of the 2” webbing. All webbing (2” or 3”) must meet the same load tests.' |
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RED_G8_GT 19:01:25 Sun Feb 14 2010 Offline 138 posts Advanced Member Reply |
It makes sense to me also. I thought that there were certain exceptions/alternatives for different situations. I've never understood why air bags don't really count for anything either.
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charlie_friend 04:34:45 Mon Feb 15 2010 Offline 24 posts Newbie Reply |
I can give you an excellent reason why "airbags don't really count for anything".
Airbags are good for one inpact, then they deflate. This works fairly well for many "civilian" road accidents which happen at relatively slow speeds. At ORR speeds, if you have an "off" there will likely be more than one impact. If you have never seen the video of my "off", check it out. An airbag would have helped for the initial impact....but would have been useless for the following impacts which got more severe with each hit. The tire failure happened at 165 mph and the car left the road at about 140-150 (my guess). My very tight belts, Kirkey aluminum seat and head and neck restraint allowed me to walk away with minor injuries. Without the "good stuff" my crash could have easily been a fatality. But I do think that the 2" belts should be permitted. Charlie (crash test dummy) Friend |
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808M3 20:40:54 Mon Feb 15 2010 Offline 8 posts Newbie Reply |
Charlie - Where would a newb like myself find a video of your off? Sounds scary for sure but it's another great example of why this equipment is so important. I'm glad to hear you agree on the 2" belt ruling. I think I'm just going to scale back to the 1/2 mile for my first outing so I can sniff this place out. Maybe the rules will be rewritten for 2011 to include the 2" lap belts.
-John |
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charlie_friend 04:50:45 Tue Feb 16 2010 Offline 24 posts Newbie Reply |
John,
As luck would have it there was a video photog at the exact place on the 90 mile course where I "dinged". I have a copy of the footage but I thought it must be on the web somewhere. Found it. On Google I went to "charlie friend, corvair". Then click on "charlie friends.....worlds fastest corvair?" Then click on Why he built a second corvair "click here". There is the video of the accident. It hurt, I was very lucky to walk away. Actually I did have to take a trip to the hospital on a backboard. Not a fun day but it could have been so much worse! Use your safety equipment and keep those belts tight! |
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boldtx 15:41:31 Wed Feb 17 2010 Offline 199 posts Advanced Member Reply |
WOW Charlie that was one scary looking crash. Just goes to show why extra safety is so important.
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