---------------------------------------------------------- Allegro-List Digest Archive --- Total Messages Posted Wed 02/28/07: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:55 AM - Windshield crazing (parahawk) ________________________________ Message 1 _____________________________________ Time: 08:55:43 AM PST US Subject: Allegro-List: Windshield crazing From: "parahawk" When I purchased my aircraft, the dealer had another Allegro with 700 hours. The upper right and left corner of the windshield had a lot of crazing,( fine cracks) everywhere. I thought at first it might be due to permanent slight engine vibrations, but after reading this article I have my doubts and it might result from using the wrong cleaning products: HERE IS AN EXERT OF THE ARTICLE: First, most aircraft windows are acrylic plastic (as opposed to Lexan or Polycarbonate), and acrylic plastic is scratchable. Proper care involves preventing scratches that are preventable and properly taking care of those that are not. When cleaning a window, always remove as much abrasive dirt as possible without touching the surface. Ideally, this would involve flushing the surface with water and allowing the accumulated bug residue to soak. After a final flushing with more water and carefully drying with a clean soft cloth, use a good cleaner/polish like Plexiclear for acrylic windows following the directions. The good ones like Plexiclear or similar products, are those that are safe to use on acrylic plastics. The bad ones, including the very dangerous, tend to be materials never intended to be used as an aircraft window cleaner/polish, such as glass cleaners. Glass cleaners invariably contain ammonia which will kill acrylic plastics. DO NOT use anything containing ammonia on acrylic plastics. It will cause crazing, thousands of microscopic cracks, in short order. ............................... -------- Flying is the highest form of life on earth. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=97893#97893 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message allegro-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Allegro-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/allegro-list Browse Digests http://www.matronics.com/digest/allegro-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.