MCE Cooling for balloon-based experiments
From MCEWiki
We have built a passive cooling system for the MCEs used in balloon-based experiments. Fins are inserted between the cards and heat transported from the fins to a heat-extraction flange via heat pipes. On the Spider gondola, the heat-extraction flange is bolted directly to the cryostat wall, which provides a sufficiently large radiating surface to cool its (48 HP) subracks.
Here are some pictures of MCE flight hardware
Here is a snapshot of the solidworks model 48HP Subrack with cooling
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