Feser's New Lineup

[Fatfool]

okay,

I'm going to take a stab at these from the sneak peeks shown. I haven't had time to read this whole thread and see if anyone had made a deduction.
These are quite simply tubes with fins on them. Manufacturing is pretty simple. Get a very thick walled metal tube, run it through a skiver in a tight, circular fashion. I've seen it being manufactured before so it's no biggie. You'll always see this sort of tube having a spiral pattern instead of having individual 'rings' because it's the most efficient method of manufacture.

I fact, I'd reckon it's easier to manufacture than standard PC rads.

Performance wise, I don't know.