I had the same problem with my KR II built in 1981 of unknown materials. Went to the airport one day to find the fuel had drained through the cockpit. I cut the top off, made a cardboard template, and had my son weld up an aluminum tank to fit the space. I lost a couple of gallons capacity: I had 21 gallons before... Won't be able to fly 750 miles anymore, but I'm not sure I want to.
On Sep 26, 2018 7:42 PM, "sparksfly2ms--- via KRnet" <firstname.lastname@example.org> wrote: > I had the same problem in my KR-2 that I built in 1982 using shell epon > and vesimid hardner. > > The fiberglass lining fell to the bottom of the tank causing fuel > starvation so, I relined the tank > > and went to 100 low lead and it was ok. Sparky > > > > > > > Sent from Windows Mail > > > > > > From: Jeff Scott via KRnet > Sent: Wednesday, September 26, 2018 5:47 PM > To: krnet > Cc: Jeff Scott > > > > > > > There has been a bit of interest in my misadventure with MOGAS and the > damaged fuel system in my SuperCub Clone. > > Today I made it to the airport and cut the top out of the fuel tanks. The > mess I found inside the tanks is incredible, and disheartening. > > > > It would appear these tanks were fabricated using 3/8" blue foam as a core > material. Overall quality was marginal to begin with, then the tanks were > apparently sealed by painting the inside with an extra coating of epoxy > resin. As the chemicals in the local Mogas attacked the resins, the > coating of resin peeled away from the inside of the tanks in sheets that > rolled up and slowly made their way to the low spot in the tanks. The blue > foam delaminated during the removal process, so I will need to fabricate > new tops for the tanks. I knew when I chose to leave these tanks in the > wings when I was finishing this project that they were an unknown, and I > may eventually have to rebuild or replace them. So now that has come home > to roost. > > > > The inside of the tanks will require significant clean up, then a lay up > or two of glass before a final prep, prime and sealing with a chemical > resistant slosh compound. These tanks were built in as an integral part > of the wing. If not for that, I would cut them out and install metal > tanks. However, at this point in time, I don't want to do a complete wing > rebuild and recover, so will rebuild the tanks. If I ever need to recover > the wings, then these tanks will likely be replaced. > > > > Photos of the mess and the clean up/rebuild process are posted on my web > site at: > > <http://jeffsplanes.com/Cub/MOGAS/mogas.html> > > > > Jeff Scott > > Cherokee Village, AR > _______________________________________________ > Search the KRnet Archives at https://www.mail-archive.com/ > email@example.com/. > 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://firstname.lastname@example.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