Future military fighters and guns - yes or no ?

George wrote:

So far the way I've seen is to use water-cooling internally which
radiates through air cooled fins, using ram-air from the slipstream to
insure rapid air movement. How well this works, I don't know.

I've seen mention of fuel cooling. Use the fuel tanks as a heat sink, then
burn the heated fuel. There's a slight efficiency loss in the engine, I
think.

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