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I'm been trying to find a detailed diagram or description of the plumbing that was used for jettisonable fuel tanks. In particular the fuel line connection between the drop tank and the plane.
That connection had to be tight enough so fuel isn't leaking or spraying out but not too tight so it can release when the tank was dropped and not cause the tank to hang up. I'm been trying to find detailed information about these connectors on the web but without any success. Funny how the old engineering knowledge can become hard to find.