Jeff, I am curious. You refer to pipe dope several times but I am not sure which pipe dope you are referring to.
Is it standard plumbers pipe dope ? Is it teflon based pipe dope ? Or is it some other pipe dope compound ? Im sure you know that there is pipe dope for water, pipe dope for gas and variations of teflon that is for water or gas. I dont run mogas but follow your thread on this because I may want to or need to some day. Certainly many of us have read that there continues to be regulatory or other drivers that seek to shut down production of aviation fuels. Aka , where is AV 80 anymore and 100 may go in that direction. Most likely not in our lifetimes. But anyway. I used a Permatex Aviation sealant rated for aviation fuels on my fuel tank drains made bu Saf-Air model CAV110 with the Permatex as a thread sealer. Just replace all four of mine. Two wing tanks, head tank and fuel strainer. So, my concern is if Permatex is the pipe dope you are referring to or any other aviation/fuel rated pipe dope / sealer ? Jeff York Lexington, KY On Dec 6, 2018 6:07 PM, "Jeff Scott via KRnet" <krnet@list.krnet.org> wrote: The KRNet has been pretty quiet as of late. Hopefully that means everyone has been in the shop working on their planes. At long last, I have finished rebuilding the tanks in my SuperCub Clone. Back in October, I posted the issues I had with extensive damage to the fuel system in my SuperCub Clone with Epoxy Resin tanks. This damage was from use of alcohol free Mogas that apparently contained other additives that were incompatible with epoxy resins. I documented on my web site in gruesome detail the process I used to rebuild these tanks from start to finish. <http://jeffsplanes.com/Cub/MOGAS/mogas.html> The wings were removed from the plane. These tanks were gutted out, and built back up with vinylester resin, then coated with a slosh compound from KBS coatings. Additionally, I have had a test running for 5 months now with several local alcohol free fuels in bottles with samples of Orings, fiberglass, and fittings with pipe dope in the threads. All but one of the local fuels damaged the epoxy impregnated fiberglass I tested. However, the quick test that I discovered was that fuels containing the damaging additive also dissolved pipe dope out of the threads of pipe fitting on contact. So, a quick test to see if the fuel is compatible with my fuel system is take a fitting with pipe dope worked into the threads, and drop it into a test sample of the fuel and swirl it around. If the fuel is incompatible, the pipe dope will dissolve as the test sample is gently swirled around. If the fuel is compatible, nothing happens. The test samples I took 4 months ago are still soaking, and the fuel from the local Conoco station has still not dissolved the pipe dope, while the other local fuels dissolved the pipe dope on contact. Now all I need is some decent weather so I can get the SuperCub out for some play! -Jeff Scott Cherokee Village, AR _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
