[nicozeg]

Warning, the following are pure divagations that were floating in my mind! There's no real block to show.

Since cathar revolutionized Block design some months ago it seems difficult to think of a better performing one with a much different concept. That parallel mini fins are hard to beat as an overall concept in simplicity and efficiency. Maybe there’s still some tweaking available in the design to improve performance using different construction techniques, as morphling is doing now with his single outlet version. But my goal is to find another approach.

As I like to swim against the flow I still believe that a radial flow design can be better, or at least as good. But a radial pattern has some problems: it’s impossible to keep a constant flow speed at the same time that the fin/channel size relation. The only way of achieving both goals with a circular expansion is with spirals. As geometric challenges are my specialty I designed a multi spiral pattern that keep both channel and fin width at 1mm. Maybe this is going to be very difficult to mill, but at this stage my only interest is designing an ideal shape, without considering manufacturing costs.