Open your frameless windows wide?

[TomW]

My '67 Overlander has the curved, frameless Corning windows. As I am still restoring it since its December purchase, there has been no reason to open the windows since they have no leak problems. New seals are at hand for when the opportunity presents itself.

This past weekend, in trying to get a good shot of some just completed interior work, I decided to open the forward window and stand on the hitch. When the window was cranked about halfway out, I stopped and looked at where the forces are applied to the glass to open it. With the way it is designed, the thought of opening the window all the way (perpendicular to body?) made me extremely uneasy. The thought that replacement windows are all but impossible to find made me crank it back down, and ask questions.

In an actual camping situation, I don't plan to sit in the Overlander sipping lemonade enjoying the breeze from an open window. I'll sit outside for that relaxation. At night, I will turn the A/C on. So, other than replacing the seals, I don't foresee opening the windows much although I want them to work when I do want to open them.

My question: Am I just being a wuss? I know that tempered glass is stronger than ordinary glass, but does it age well? Has anyone ever broken one of these frameless windows by leaving it open too wide or in the wrong weather? Any general comments on how strong these windows are?

Thanks,
Tom