Somewhere in the back of my brain exist memories of a story about a mission to Jupiter or Saturn. Someone had discovered that there existed beings on whichever gas giant it was that were trying to escape the gravity and pressure so they could destroy or at least fight with Earth. Of course no materials existed that would withstand the pressure, so scientists/engineers developed forcefields with the required strength which turned out to be unstable. So they dismissed the idea as impossible and quit, writing off the invasion as ‘Impossible”

An individual took the data, and made a force field that flickered, like a fluorescent light, so that it was only “On” for time periods far too short to become unstable. it nearly cost him his life but he succeeded where the engineers/scientists chose not to proceed.

I cannot remember the name of that to save my bacon. Anyone?