Just thought I’d throw this out to spark up the forum today. Dealing with tri-fin placement. I was just wondering when moving in side fins closer together (further from the rail and closer to eachother)when do they become to close together and truely disrupt turning. Isn’t the rule of thumb tighter the bunch tighter the turns? One other thing to consider. When moving side fins closer would it be necessary to adjust the tailing center fins as well? what about effects either way? any comments?
Just thought I’d throw this out to spark up the forum today. Dealing with > tri-fin placement. I was just wondering when moving in side fins closer > together (further from the rail and closer to eachother)when do they > become to close together and truely disrupt turning. Isn’t the rule of > thumb tighter the bunch tighter the turns? One other thing to consider. > When moving side fins closer would it be necessary to adjust the tailing > center fins as well? what about effects either way? any comments? As you move the side fins further from the rails, you will cause more of the rail to bury in each turn until the buoyancey of the rail overcomes the lift coefficient of the side fin and the drive of your weight pressing it down. Consequently, initially if you just move the fins closer to the stringer the board should become harder to turn (but with more drive) until you get to a point where you loose fin bite altogether. If you want to loosen up a board move the fins closer together front to back rather than side to side.
By moving the complete fin configuration forward you will be utilizing a lager tail area which should loosen up turning. But, if you move the fin configuration more towards the rear, you will be using a smaller tail area creating more drawn out turns let more drive? Or would drive by hindered by the movement towards the rear because in order to compenstate for the reduced tail area the fin configuration becomes closer together as a hole?
As you move the side fins further from the rails, you will cause more of > the rail to bury in each turn until the buoyancey of the rail overcomes > the lift coefficient of the side fin and the drive of your weight pressing > it down. Consequently, initially if you just move the fins closer to the > stringer the board should become harder to turn (but with more drive) > until you get to a point where you loose fin bite altogether.>>> If you want to loosen up a board move the fins closer together front to > back rather than side to side. In addition, if you move the two outer fins (with typical trifin depth and surface area) closer to the centerline, you
ll increase the boards chances of drifting and spinning out.
By moving the complete fin configuration forward you will be utilizing a > lager tail area which should loosen up turning. But, if you move the fin > configuration more towards the rear, you will be using a smaller tail area > creating more drawn out turns let more drive? Or would drive by hindered > by the movement towards the rear because in order to compenstate for the > reduced tail area the fin configuration becomes closer together as a hole? That’s a different take that I have had to consider. Since the side fins are toed inward on thrusters and Red X moves the side fin parallel to the designed toe. When you move the cluster all at once aft it naturally moves the fins out toward the rail and vise versa. So, I have not tried the exact premise you describe. However, from my single fin experience I would have to say that it would tighten the board up.