20 fins per inch, nice!
I find it odd that they would use a 4:1 ratio, of channel-to-fin. I understood that the ideal ratio was at least 8:1, but maybe that was for aluminium:shrug:
In water, that ratio is actually high, where Cathar calculated it (under set circumstances) to be ideal somewhere between 1:0.75 and 1:1.5 , but it is known that a higher fin density will provide better performance, albeit with a higher water pressure.
This should be interesting!
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