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Fin distance to rail #2910860
02/08/19 08:45 PM
02/08/19 08:45 PM
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patrolman Offline OP
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All other things being equal- toe, cant, distance from tail- what effect does moving a fin closer to or further from the rail have?

Re: Fin distance to rail [Re: patrolman] #2910892
02/08/19 09:04 PM
02/08/19 09:04 PM
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Aruka Offline
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The first board I ever made I screwed up the using the FCS fusion jig and the fin boxes ended up being a bit further from the rail than is "standard". This tightened up the thruster fin cluster and made for a pretty loose ride. It was a pretty low rockered board with a widish round tail so it probably would have been a fast and loose ride anyways but to me it felt like it didn't hold a rail in anything juicy as well as it may have with side fins closer to the rail. It was actually pretty fun in crappy waves but probably would have been more versatile with fins closer to the rail.

Re: Fin distance to rail [Re: patrolman] #2911002
02/09/19 12:40 AM
02/09/19 12:40 AM
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need 4 speed Offline
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What distance are you running ? I asked gs the other day and 1 1/4' was the approximate number


NOT THAT KIND
Re: Fin distance to rail [Re: need 4 speed] #2911025
02/09/19 01:29 AM
02/09/19 01:29 AM
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need 4 speed Offline
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These are from a SK twinzer. Stu likes the fin placement on that board, a little more inboard





NOT THAT KIND
Re: Fin distance to rail [Re: need 4 speed] #2911033
02/09/19 02:21 AM
02/09/19 02:21 AM
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sdsurfrat Offline
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Originally Posted By: need 4 speed
These are from a SK twinzer. Stu likes the fin placement on that board, a little more inboard






Now measure from the Shapers dot, or back of the main fin, to the end of the board

shocked

Re: Fin distance to rail [Re: patrolman] #2911045
02/09/19 04:09 AM
02/09/19 04:09 AM
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Spinafex Offline
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Originally Posted By: patrolman
All other things being equal- toe, cant, distance from tail- what effect does moving a fin closer to or further from the rail have?


Shapers usually sit their fronts as close to the rail as is comfortable to sand fin plugs - about 1 1/2". Given this constant (and cant and distance from tail) - the shape of the cluster relative to tail width/shape and fin size is what affects performance.