aegis
Posts: 384
Joined: 11/30/2003 From: Tempe, AZ, USA Status: offline
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quote:
I ordered some bonded washers to see if they work. In the meantime, i put metal washers inside the cowl over the holes and put a some fiberglass over it. Have you mounted the cowl since adding the metal washers? The reason I ask is that I had considered doing the same thing but my cowl fits nice and snug to begin with so I didn't think there would be enough "slop" to have room for washers. I thought about using grommets but didn't for the same reason. What I've done on different planes that works well is to epoxy a CA hinge on the inside of the cowl at each hole location and then put a thin layer of silicone over the hinge. The CA hinge helps to keep the cowl from cracking and holes from elongating, and the layer of silicone provides some vibration dampening. The silicone also helps to "stick" the cowl to the mounting tabs so vibration doesn't make the cowl giggle around as much (causing the holes to elongate). Something else I've done is to get large, thin rubber fender washers from the hardware store and cut out squares that are then glued onto the cowl's mounting tabs. Gluing the rubber washers on the tabs plus using the CA hinge/silicone idea provides good vibration dampening, plus the combination of the rubber washer and silicone really keeps the cowl stuck in place so the holes don't elongate. Dan
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