Am I slow for only JUST discovering that EVERY fin in the FCS range has the same leading edge curve / rake?
I couldn't believe it... I went through all the thruster set up fins and overlayed them in photoshop ( shut up I soooo am not a GEEK!!! AM NOT!!! ) and they are exactly the same. Sure, the base length changes, the tip volume changes, the trailing edge changes ( heaps ) between models... but the leading edge of the fin... that's holy it seems!
Note you can't establish this by holding two fins next to each other unless they are the same height... but if you overlay an Occy fin over an FG-5 over Sunny over a DHD-2, the curve is identical ( just scaled up or down ).
Speeedfins are slightly different.... more raked back and slightly flatter through the middle of the curve... but like FCS, any fin in the range still uses the same curve.
It makes you realise what a departure something like a H-2 ( or the Speeedfins hydro equivalent ) really is.
So I am now wondering... where did this curve come from? Who established it as sacred? Who first put it down on a piece of paper? I also wonder, does it represent a compromise that shapers of old who actually sanded glassed in fins to fine tune boards lament?