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Author Topic:   D-Cel Harness
blanep
Dirt Full Roller

Total posts: 66
posted August 25, 2002 11:22 PM
Has anyone tried out the D-Cel harness yet? For those who have no idea what I'm talking about it is the new version of the Hutchens Device which is being made by the same company (Safety Solutions). It doesn't hook in to the anti-sub belt and therefore is much less cumbersome yet provides the same level of protection as the original hutchens. Anyways, just wanted to know if anyone has used it and what their impressions of it were.

Dunbar
Dirt Maniac

Total posts: 119
posted August 26, 2002 05:21 PM
Nope never tried it atcually never heard of the d-cell. But I got me a simpson donut and a kirkey head rest of I really dont worry too much about head and neck restraints but I would love to try a device like that only if someone bought or sponsored me 1 but i dont think i'd like it better than my donut and headrest.

redneck racing
Dirt Freak

Total posts: 276
posted September 02, 2002 10:35 PM
Seen in Circle Track where someone uses three of the strap head supports one under each arm to the d rings on the helmet and in the back they have sewn a piece to the suit and run a strap from there to the d ring on the back of the helmet. Eddie

blanep
Dirt Full Roller

Total posts: 66
posted September 04, 2002 01:16 AM
In the following I am not trying to insult or argue with anyone. I also don't want to come across as a head and neck restraint salesman or saftey preacher.

With that said, a neck collar is a great start. Though it was originally designed for go-carts and such to prevent compression injuries in the neck, it does offer a small amount of side to side and front to rear protection. No tests that I know of that have been done show that wearing a collar impairs the ability of a hutchens or d-cel type device to function properly (obviously it would interfere with a Hans device so no tests have combined those two items), but at the same time the tests haven't shown any added protection from the collar being present. In other words if it doesn't increase the performance of a head and neck restraint device any then it probably doesn't offer a sufficient level of protection when used alone. But like I said, it's gotta be better than nothing.

As for the straps under each arm and connected to the side helmet rings, I can see where that would definately help in side to side motion, but few severe injuries are cause in those types of motions unless you start getting into sprints or something like that which can really whip you violently with side to side movement. But again, it can't hurt anything to use them. But a strap attached to something sewn to the back of your suit just isn't going to do anything at all IMHO. First I don't think that a person could ever get a sewn attachment point on the back to ever hold in the type of wreck where you would actually be needing it to work for you. Second, assuming that the attachment point does hold, the suit can easily be pulled up your back a small distance in a hard forward impact thereby nagating any benefit it would have otherwise provided. The only way I can see that method working is if it went all the way down your back and underneath you and attached either around your thighs or to your anti-sub belt. If that's the case then that's exactly what a hutchens and d-cel do and why they work.

Again, I hate to sound like I'm preaching, but I wish I could post one of the graphs out of any of the major racing mags this year showing the sled results of no restraint vs. hans vs. hutchens vs. d-cel (modified hutchens) for those who didn't get to see them. The latter 3 basically performed the same with the Hans slightly ahead but out of reach financially of most of us. Unrestrained (only using a 5-point harness) with a normal weight helmet, the forces acting on the neck area easily reached severe/lethal ranges at impacts of 30 degrees and 60 mph. Levels reached varied from 8300 to 10900 newtons with anything over 4100 newtons causing some type of head/neck injury and anything over 8000 newtons being in the lethal range. However the highest level reached using one of the 3 head and neck restraints was 2650 newtons. That speaks huge volumes to the effectiveness of these devices and at roughly $300 (for the hutchens or d-cel) I just don't see how a person could go wrong getting one.

[This message has been edited by blanep (edited September 04, 2002).]

widebody
Dirt Maniac

Total posts: 197
posted September 05, 2002 09:51 AM
IM SOLD!!
Thanks for the information. I must admit ive been completly ignorant of the whole head and neck restraint issue. But the numbers speak volumes.

What mag specifically has had some articles. I generally catch up on my reading over the off season..

I think for x-mas Im going to get myself one. $300 is not alot for safty. Im sure they will come down in price also...
Beside i can toss that donut collar, and put my helmet skirt back on!!!
Other than keep dirt and rocks out of my neck, i never thought much of donut collars.

blanep
Dirt Full Roller

Total posts: 66
posted September 05, 2002 05:00 PM
Widebody, the articles appeared as follows:
Circle Track, August 2002, pg 85.
Stock Car Racing, September 2002, pg 62.

Also, there is a great editorial by Joyce Standridge in the June 2002 issue of Speedway Illustrated regarding a videotape from GM of sled tests in regard to the initial stages and testing of Randy LaJoie's seat design. To sum it up GM places cameras inside their sled at various places to record the unubstructed views of the movement of the "drivers" head and then crashes the sled at 30 mph. To quote Randy after viewing the tape, "I was devastated. It absolutely brought me to my knees with the realization that even at 30 mph a person could be seriously injured - if not killed."

After the author viewed the tape herself she says that "He (Randy) hadn't exaggerated. It nearly brought us to our knees too. What we see head on is that even strapped almost to no-breathing tightness, properly mounted seat belts stretch several inches. Bear in mind that they are expected to give some. Otherwise, they would destroy soft tissue. But the amount of movement on this videotape was - and here I struggle mightily for a word - disturbing. Frightening. Amazing. Dangerous."

This article also contains THIS VERY IMPORTANT AND INFORMATIVE INFORMATION:
Standridge writes, "A few years ago, I compiled statistics about auto-racing related deaths and found that of the 27 drivers who died that year, 25 were support-class racers. Guys who weren't going all that fast".

The article then goes on to state that even though the footage almost resulted in Randy giving up on the seat idea due to the apparent inability to contain himself and fellow drivers safely, GM encouraged him to continue the development because no other seat they had tested had done as well at holding the driver in.

Again, this just goes to show the forces involved in even a 30 mph crash. If the body moves forward several inches even when strapped in tightly, then just imagine the velocity at which the combined weight of the head and helmet is going to be going even after the body stops it's forward movement.

SLEEPY GOMEZ
Dirt Maniac

Total posts: 199
posted September 09, 2002 01:03 PM
BLANEP, you just did a marvelous job on the head restraint subject. I attended a seminar at Boone last week on this subject. It was well announced and held early afternoon. Less than twenty racers out of 725 plus showed up. I think these devices should be marketed to the wives/girlfriends. Note to the racer: if she doesn't buy you one you might think twice about keeping her.

The racer will spend $350 on a carb anytime but not on himself. Frankly, it is my opinion a large number of racers would not have a roll cage if it wern't required.

We will have a Dcell next season. They are about $400 but are much easier to wear and fit. SLEEPY

blanep
Dirt Full Roller

Total posts: 66
posted September 11, 2002 12:12 AM
I actually recieved a couple e-mails, 1 of which was trying to locate where you get d-cel harnesses from so I figured I'd post a couple links and add to em as I come up with them.

www.hutchensdevice.com - this is the manufacturers site for both the hutchens device and the d-cel. Not sure whether you can by order directly from them or not. They do have .pdf instructions on both types there though.

www.bsrproducts.com - One retailer who I know carries both designs though I am sure there are others (all retailers are gonna be roughly the same price though at this point in time). NOTE- Both located under "new products". Two pics are there, left is original hutchens and right is d-cel.

www.hansdevice.com - By far the priciest head/neck restraint at the moment. Look to spend $1000-$1300 for one of these. Thought I'd throw this link in for the heck of it though.

[This message has been edited by blanep (edited September 11, 2002).]

[This message has been edited by blanep (edited September 11, 2002).]

blanep
Dirt Full Roller

Total posts: 66
posted October 01, 2002 02:11 PM
It seems as though Simpson has also come up with a head/neck restraint which is very similar in design to the D-cel although the Simpson version is $100 more expensive right now at $450.
http://www.teamsimpson.com/catalog/restraints/50000.html

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