

| Subject: | Re: Post chrome strip rubber cleaning Q |
| From: | John Bange |
| Date: | Mon, 16 May 2005 16:31:04 -0700 |
> Wow, lots of interest in this subject. Yeah, this subject is one of those "hot button" topics, like tires or wheels. > I stand by my reporting of the > junkyard caper. Why risk the windshield popping out and hurting someone, > just for a cool black gasket look,or because someone dosent like the old > stuff,and lacks the ability to reinstall them?. Because both simple physics and the current manufacturer of the rubber seal say it's NOT a risk. We've already covered the manufacturer, who says it's purely cosmetic. For the physics, let's be generous and assume for Frank G's "experiment" that it took 50% less pressure after removing the strip, that he was pushing with his arms rather than his legs, and that he was a wimpy guy like me who could only exert 150lbs of force. The windshield being at approximately 30 degrees from vertical, in a front end collision a little less than 2/3 the G force applied is perpendicular to the window surface. Assuming 75lbs to knock out a windshield means that a 20lb windshiled would require 3.75G's perpendicular to pop loose, which translates to 5.86G's along the horizontal. Given that actual crashes seldom last longer than .2 seconds, that means that it'd take an accident wherein you went from at LEAST 25mph to a dead stop to pop that windshield out. Flying safety-glass windshields are really the least of your worries in 25mph delta-V deceleration events. > VW went to the trouble to > put them in for a reason.I have seen them on other makes too. Their presence doesn't determine their purpose. If they were so critical to retaining the windshield, why are they absent on later model Vanagons? > Who am I to > remove them? Not me , thats all. That's fine. They clearly DO help retain the windshield and prevent leaking to some degree. I'm just saying that it's incorrect to assume that removing them is DANGEROUS via speculation, itself based on the anecdotal reports of one guy in a junkyard's guesstimates.
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