Join Date: Mar 2007
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Originally Posted by mondofromredondo
Currently waiting on Thumper from PSC as he may have a source.
I have the older Oval shaped portlights on my 1988 PSC 34.
I understand the change to the new style occured in 1990. Not sure if the double pane was used in all models because of problems.
What would be the rationale for using Polycarb or acrylic over safety glass?
Keith the rectangular PSC/Chatfield portlights came into use in the late 1980's. I've seen 1989 models that were built in '88 with the rectangulars. There was a short period where owners could opt for the old oval portlights instead of the new ones. So you will come across '89 boats with the ovals. But I think the majority of '89s were rectangular.
My suggestion to use polycarbonate (Lexan) or acrylic for lens replacement rather than the safety glass is based on my own experiences. Because of their design, the laminated glass in the older oval portlights was especially prone to wicking moisture between the layers when the lens bedding deteriorated-- which results in the foggy/cloudy lens syndrome.
Also, I had an oval lens spider-web on me when a large portlight accidentally slammed shut. I wanted to eliminate the possibility of this happenning again.
So when I rebuilt the oval portlights on our previous Dana 24, I decided not to replace with safety glass. I went with a single, thicker lens made of acrylic. Polycarbonate is stronger, but more susceptible to UV damage. I reasoned that the acrylic was adequately strong for the size of the relatively small portlight lenses, and would last longer than polycarbonate (which would eventually craze from UV exposure).
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Pacific Seacraft Crealock 31 #62
NEVER CALLS CRUISINGDAD BACK....CAN"T TAKE THE ACCENT