windshield

[Richard Hudgins]

Steve R,

I think that you are correct in the mounting causing the problem.

However, I do not think that that it is matter of the installation in most cases, but rather that the mount structure is not strong enough in a torsional load condition.

If you look at the windscreen mount/dash hoop structure areas in most roadsters, they are not very strong in torsional stiffness.

Therefore, under heavy loading (Such as track use with slicks, etc.) the windscreen frame is subjected to twisting as the underlying structure deflects under these severe loads. (Note: if you do a little search about windscreen breakage, you will find a very high percentage of these breakages occur during track use. Try the FFR forum, there is plenty of info about this there.)

terry lee,

Pulling on the upper corner as you get out of the car does the same thing as mentioned above. Torsional loading. NOT a good thing on this windcreen design.

The nice thing about the Lexan is that you can stress it much farther then you can glass and still not crack it. (Of course, you do have to be very carefull with hydrocarbon based solvents around polycarbonate as it will cause chemical stress cracking and hazing.)