I don’t know the technical term, but I was looking at some airplane wings and it looked like they had a double foil at the base and a single foil (even concave on one side) at the tip.
Is there anyone out there making fins with a double foil at the base progressing to a single foil at the tip?
It seems like you could get the superior hydrodynamics of the double foil, but also the superior grip/hold/pump-action of a single foil.
Will Jobson was doing some things along those lines. Also check out the Futures Vector series.
Jobson’s neomorph fins were single foiled at the base, and then twisted in the tip section so that toe-in was less, and double foiled in the tip section. These were the successor to the Twinzer main fins (the forward twinzer fin stayed the same). There’s a picture of them floating around on a Jobson-shaped Mandala Twinzer.
As already mentioned, the Vector series alters cant and foil based on depth of the fin.
With more complex foils it can be misleading, terming foils as single and double is a simplification that help to understand fin contours.
Fin foils can progress form double to single and back to double. Some of the foils I use on rail fins reflect this. Double to single in it’s most simple form can be done by Simply double foiling the leading edge of an over the counter flat sided rail fin will improve its performance.
No Worries, Rich
No Worries, Rich