Chris,
I like your idea, but I have a suggestion - a little too late maybe: If you make the inspection cover non-circular you can insert the cover inside the tank and fasten it by squeezing the rib between the cover and an outer ring. Advantage is that the fasteners are then in the cover and not the rib. Any future repair or fixing of a leak would be easier. Just a thought. Sorry, I don't have a good suggestion for a gasket material.
Gary
Folks,
I put an inspection hatch into the inner wing rib to allow access into the
tank. There's a large phenolic ring embedded in the inner side of the rib.
I'm now looking for some gasket material to replace the 40+ year old
rubberized cork material I used for the trial assembly while building. The
photos show the hole with and without the aluminum cover plate. I'm
requesting any suggestions for gasket material and any additional sealant
needed. Thanks in advance.
Regards, Chris.