HANS Sport Evaluation

[JimLill]

I just did a back to back of this unit with the DefNder. I am finding the same things I found when I bought the HANS 6+ months ago. It's uncomfortable across my boney collarbones (I could add more padding), the sliding tethers seem a little too long, and the back of the collar interferes with my Sparco Evo L seat and my SPY05 helmet. It may just be a matter of getting used to it.

More as time and weather permit..........

[leggwork]

how does the side-to-side movement of your head compare with the hans and the defnder?
thanks
bruce

[JimLill]

how does the side-to-side movement of your head compare with the hans and the defnder?
thanks
bruce

DefNder appears to be more "protective"

[JimLill]

Here is a darn nice pix of a Schroth HANS Sport which is actually nicer looking than my USA made Sport

http://english.schroth.com/gfx/dyn/produkte_daten/gross_450/88/1.jpg

[leggwork]

I believe Schroth received a patent for the design of the friction surfaces.
bruce

[JimLill]

I believe Schroth received a patent for the design of the friction surfaces.

Yep, US Patent #7,017,194

[kishg]

the thing that worries me about hans and why i went with defnder is the possibility of the hans slipping out from under the belts in an impact as shown here: http://www.youtube.com/watch?v=MkB9D8eFLLg

thoughts?

[JimLill]

the thing that worries me about hans and why i went with defnder is the possibility of the hans slipping out from under the belts in an impact as shown here: http://www.youtube.com/watch?v=MkB9D8eFLLg
thoughts?

The one thing I have learned along the way is that shoulder harness location, rear fixment, and tension is critical. The best source of information on how to do that is in the FIA docs or the Schroth manual FWICT.

The sled tests are nice but how are the belts tensioned there, are they per HANS reco or whoever's device is being tested? The position and freeness of the dummy's arms are another area I think about as they are restrained which is not what a racer is likely to do. He'd be holding the wheel or at least trying and his arm loading or grip would likely be largely symmetrical.

[Mad Mike]

the thing that worries me about hans and why i went with defnder is the possibility of the hans slipping out from under the belts in an impact as shown here: http://www.youtube.com/watch?v=MkB9D8eFLLg

thoughts?

I'll have no confidence that test is legit until someone can explain to me why the strap keeping the dummy's left arm below its thigh is more snug than even the 6-point harnesses, is much tighter than the one on the right arm -and- is tighter than any arms constrained in other sled tests I can find on the web. It seems more than coincidental to me that the slipped belt and the strapped arm are on the same side as the camera. While I'm no engineer it sure appears to me that the strapped arm aids the whole belt slipping situation.

[Circuit Motorsports]

You can't overlook the fact that the sled test seat has NO side bolsters.

For lateral movement a harness doesn't do nearly as much at keeping the body in place as it does in a 0 degree impact.

I have no reason to think that the test in that video had the belts tightened to the same level as all the other tests. The amount of torso movement is in line with all the other 30 degree impacts I've seen.

Yes, there is a chance that the belt can come out from under the harness. People have had it happen as the are just running down the track. The biggest problem is that those people have bought the HANS device and thought they were done with HNR safety. The HANS Quick setup guide has some very simple directions on how the harness should be installed. Max 3" in between the shoulder harnesses and within 8" of the driver for mounting. I've sat in cars where this was followed and I've sat in cars where this wasn't followed. There is a world of difference in how the belts sit on the device.

http://i2.photobucket.com/albums/y46/cooleyjb/untitled.jpg

[kbrew8991]

the thing that worries me about hans and why i went with defnder is the possibility of the hans slipping out from under the belts in an impact as shown here: http://www.youtube.com/watch?v=MkB9D8eFLLg

thoughts?
I wasn't sure the Defender's green hook things went the correct way to help retain the belts, so I went with the R3

so long as we all have choice to fit what we want :)

[kishg]

I wasn't sure the Defender's green hook things went the correct way to help retain the belts, so I went with the R3

so long as we all have choice to fit what we want :)

the green stabilizer doesn't retain the belts. the wings on the main body do. the belts route over them and then get cinched tight pushing the flexible yoke against you. belts are very unlikely to move.