[SystemSafety] Wheel detachment from a moving car / problem was solved many years ago, not widely adopted

[RICQUE Bertrand (SAGEM DEFENSE SECURITE)]

Personally, 0 miles but around 500 000 km and no tire lost.

Bertrand Ricque
Program Manager
Optronics and Defence Division
Sights Program
Mob : +33 6 87 47 84 64
Tel : +33 1 58 11 96 82
Bertrand.ricque at sagem.com

-----Original Message-----
From: systemsafety-bounces at lists.techfak.uni-bielefeld.de [mailto:systemsafety-bounces at lists.techfak.uni-bielefeld.de] On Behalf Of Steve Tockey
Sent: Tuesday, May 26, 2015 5:15 PM
To: Bernd Sieker; systemsafety at lists.techfak.uni-bielefeld.de
Subject: Re: [SystemSafety] Wheel detachment from a moving car / problem was solved many years ago, not widely adopted


I've got no idea how many miles I've driven in my life, but probably in the neighborhood of about 350,000. In all that time, I've seen wheels lost--by other people--twice. Once was on a freeway in California, I was headed north, they were headed south on the other side. I remember seeing the wheel bouncing down the southbound lanes as the car it came of at came to an abrupt halt. The other was when a wheel fell off a boat trailer.

I've seen the explosive failure on large trucks (lorries) twice just in the last 5 years. Big tires, big bang with lots of noise.

US drivers commonly see the fallen off tread from failed retread tires.
You probably can't drive 50 miles without seeing that.


I remember my parents having Chrysler cars in the 1960 with the left- and right-hand wheel nuts. I remember being told that it was that way because of tire rotation it would tend to tighten loose wheel nuts rather than loosen them. It would be interesting to analyze when wheels do fall off do they tend to fall off the same side?? (thus, arguing for going back to the
left- and right-hand format).



Cheers,

-- steve




-----Original Message-----
From: Bernd Sieker <sieker at causalis.com>
Date: Tuesday, May 26, 2015 8:07 AM
To: "systemsafety at lists.techfak.uni-bielefeld.de"
<systemsafety at lists.techfak.uni-bielefeld.de>
Subject: Re: [SystemSafety] Wheel detachment from a moving car / problem was solved many years ago, not widely adopted

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512


This is strange; I talked to a number of people, and nobody knows anyone, or knows anyone who heard of anyone who has ever lost a wheel while driving. At least in Germany. I can't recall a single case being reported in the newspapers. Maybe shop procedures are better over here.

Having a tyre fail is much more common, and almost everyone either had it happen to him or knows someone directly to whom it happened. Either complete (slow) deflation, explosive failure (rare) or losing parts of the tread (especially on retreaded tyres. Happened to my wife, and it was the last time we ever bought retreaded).

I heard of the Chrysler way (maybe some German manufacturers also did it?), but it just didn't seem to be worth the hassle because if tightened properly, wheel nuts just didn't fail.


Bernd

-----BEGIN PGP SIGNATURE-----
Comment: GPGTools - http://gpgtools.org

iQEcBAEBCgAGBQJVZIwsAAoJEPCgtsw5k0hSUgUH/jQmJMMhgdCo+mrHFn9x3x2j
Qm/UhMvWRhMOfXph0g/9YzV677irPLaUIaFcFezz7Gzwfzm+9Hcsx605ubwBSWhj
U9K+mG7mblHDnBLbhXz4268+/Z5BFa7NBfMEWqvFRic2ODr15CPFXgcSkJucQEyL
mEX+5OhBI69m50Rr4yxd/Ejo9wKTc5+ubZi7vpogKfss+0lrpQcx56EI3nbEgZhQ
bUHopjhfrY/kOWq70P1VkUu9YZq8oagHzB6vAhtHLznywHpBANPxa/doXO+lX5ks
2moNMDK1zVhfXAcXpOqJVAISx9Hm5NgHiyJgi5r4yW/SChGWywH3Ms+E4aceEio=
=G0N/
-----END PGP SIGNATURE-----
_______________________________________________
The System Safety Mailing List
systemsafety at TechFak.Uni-Bielefeld.DE

_______________________________________________
The System Safety Mailing List
systemsafety at TechFak.Uni-Bielefeld.DE
#
" Ce courriel et les documents qui lui sont joints peuvent contenir des informations confidentielles, être soumis aux règlementations relatives au contrôle des exportations ou ayant un caractère privé. S'ils ne vous sont pas destinés, nous vous signalons qu'il est strictement interdit de les divulguer, de les reproduire ou d'en utiliser de quelque manière que ce soit le contenu. Toute exportation ou réexportation non autorisée est interdite Si ce message vous a été transmis par erreur, merci d'en informer l'expéditeur et de supprimer immédiatement de votre système informatique ce courriel ainsi que tous les documents qui y sont attachés."
******
" This e-mail and any attached documents may contain confidential or proprietary information and may be subject to export control laws and regulations. If you are not the intended recipient, you are notified that any dissemination, copying of this e-mail and any attachments thereto or use of their contents by any means whatsoever is strictly prohibited. Unauthorized export or re-export is prohibited. If you have received this e-mail in error, please advise the sender immediately and delete this e-mail and all attached documents from your computer system."
#