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| 237529 | 11630 | New Board Stoke Thread | 98 | Bruce Fowler | Feb 14, 2022 | 2022-02-14T09:02:28-0500 | Syncro said: I like my twins to have a bit more of the fins to have a bit more angle inward on my 8ft twin egg I did 1/4inch in instead of the typical 1/8th. I've also been told that the angle of the fins if you were to take a string from the fin to the nose it would match the angle if that makes sense... who knows. But I feel with the fins angle slightly in more theres more drive, where if they were straight it would be a more loose feeling. Click to expand... I would interpret "more straight" as more parallel to center stringer. Toe in is defined as the relationship/distance (of) leading edge of the fin to stringer versus trailing edge of fin to stringer. Straight creates more drive or tracking, particularly w/a flat inside foiled fin. Fish are commonly short, and if the keels are 50/50 foiled many people opt for less toe in @ 1/8" (leading edge 1/8" closer to center than trailing edge) or even entire fin parallel to stringer. The "string would match to angle" comment refers to trajectory of fin toward the nose. Using string or a straight edge, the line extending from the fin might point directly at the nose, intersect before the nose, or be offset toward rail from the nose. This cause & effect triangulation is largely open to personal preference. Cant aka fin tilt also plays into the surfboard's feel. More cant, meaning the tip of the fins splay further out (toward rail) from the bottom than the base, produces easier turning while more vertical creates more drive. Historically the cant of Bonzer runners were extreme at 19 degrees while the pre-built cant in Futures Fins are 6 to 6.5 degrees. FCS Fusion boxes are offered in 0, 5, & 8 degrees to accommodate different bottom configurations. When we first started building versions of Simon Anderson''s Thruster design, circa 1981, most of us opted for a cant of 3 degrees. |