Syed1.
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As a mech engineer, having liquid cooled radars does not make sense to me. Liquid cooling will make the radar heat exchangers bulky, plus then you have to find means of dispelling the heat within the liquid to the air to complete the cycle. On the flip side an air cooled radar would make more sense, since the one thing that any plane has abundant supply of is fast moving cold air. The heated air can be discharged and replenished with new air without having the need to remove the heat from the air. The only advantage of a liquid cooled system is that it is thermally more efficient. Perhaps there are other considerations in a jet that I'm missing.