thomas1142 Posted October 7, 2021 Report Posted October 7, 2021 I just took apart a rotating beacon (located on the belly) from a 1997 M20J and found the unit electronics are encased in some type of silicone. Would anyone know what that silicone is and what I can replace it with? Thanks
carusoam Posted October 7, 2021 Report Posted October 7, 2021 Often electronic things get buried in epoxy… which is a hard finished product… Got any pics of it? Best regards, -a-
thomas1142 Posted October 7, 2021 Author Report Posted October 7, 2021 I cleaned it all up. The substance look and felt like silicone, very soft and flexible. I would say just like silicone caulking.
philiplane Posted October 7, 2021 Report Posted October 7, 2021 someone loaded it up trying to prevent corrosion from water inside the lens. A lot of these were water traps. Not needed if the drain hole in the lens is open. 1
PT20J Posted October 7, 2021 Report Posted October 7, 2021 Humiseal is pretty standard in the electronics industry for protecting circuit boards from moisture. https://chasecorp.com/HumiSeal/ 1
Guest Posted October 7, 2021 Report Posted October 7, 2021 We’re replacing a Whelen LED belly beacon on an Ovation because it wasn’t sealed, and had no drain hole in the lens. It had some TKS fluid inside. Sealing and a drain hole are important. Clarence
A64Pilot Posted October 7, 2021 Report Posted October 7, 2021 Is it actually a rotating beacon? just curious.
thomas1142 Posted October 7, 2021 Author Report Posted October 7, 2021 1 hour ago, A64Pilot said: Is it actually a rotating beacon? just curious. Mine just flashes, no rotating.
thomas1142 Posted October 7, 2021 Author Report Posted October 7, 2021 2 hours ago, M20Doc said: Sealing and a drain hole are important I don’t think their is a drain hole in my lens either, I’ll be drilling.
A64Pilot Posted October 7, 2021 Report Posted October 7, 2021 9 hours ago, thomas1142 said: I don’t think their is a drain hole in my lens either, I’ll be drilling. Assuming it’s decades old and if it has no liquid in it, why would you?
thomas1142 Posted October 8, 2021 Author Report Posted October 8, 2021 14 hours ago, A64Pilot said: Assuming it’s decades old and if it has no liquid in it, why would you? That’s very true. It did not have any water, nor was there any evidence that water had penetrated at any time. Maybe I’ll just monitor it after I get it back together just to make sure my installation is as good as the original.
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