Heat exchanger prototype, February 2007

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Copper fins have been cut to length and holes punched for the heat transfer tubes.

Copper fins against a scale to confirm measurements.

Machinist shears a strip of heavier copper, and demonstrates how to roll it into a collar.

The collar fits around this ceramic substrate, with several fins in place to show how they will assemble. Next step is to drill the collar for the coolant tubes, and then braze the copper pieces together.

Critical measurements

These are the critical dimensions for software simulation.