Surfboard Fins: Shortboard Thruster
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Published on October 13, 2011
Description
These are standard size fins for a shortboard in thruster configuration (3 fins). These fins are made to be compatible with fin boxes made by ProBox. But they can easily be made compatible with FCS fin boxes by cutting a notch in the tab at the base, or glassed on if the tab is fully removed. **UPDATE** Added a crude futures compatible base. Be aware that Futures side fins have cant built into the fin rather than into the base like FCS and ProBox.
If you like these checkout mesheldrake's Cardboard Surfboard thingiverse.com/thing:4764 or his other boards at sheldrake.net/cardboards/
His most excellent work on these cardboard surfboards inspired this creation.
Also check out my Longboard trailer fin at thingiverse.com/thing:12496
and my longboard side bites at thingiverse.com/thing:12497
If you like these checkout mesheldrake's Cardboard Surfboard thingiverse.com/thing:4764 or his other boards at sheldrake.net/cardboards/
His most excellent work on these cardboard surfboards inspired this creation.
Also check out my Longboard trailer fin at thingiverse.com/thing:12496
and my longboard side bites at thingiverse.com/thing:12497
Instructions
If you surf you should be able to figure it out, but here are some instructions for the rest of you.
For side fins use 1/4" or 6mm stock and cut one for each side, flat side faces in toward the center of the board. For the center trailing fin use 1/8" or 3mm stock and cut one of each then glue them together. Set red to vector cut and black to raster. The foil will be made by the black raster, so run it at full power and very slow. I used a 60 Watt Universal laser cutter with power at 100%, speed at 1.5%, and 1000 ppi for 1/4" birch plywood. With a little sanding and maybe some epoxy or polyester resin you can make and surf your own fins.
For side fins use 1/4" or 6mm stock and cut one for each side, flat side faces in toward the center of the board. For the center trailing fin use 1/8" or 3mm stock and cut one of each then glue them together. Set red to vector cut and black to raster. The foil will be made by the black raster, so run it at full power and very slow. I used a 60 Watt Universal laser cutter with power at 100%, speed at 1.5%, and 1000 ppi for 1/4" birch plywood. With a little sanding and maybe some epoxy or polyester resin you can make and surf your own fins.
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License
Surfboard Fins: Shortboard Thruster by surfair is licensed under the Attribution - Share Alike - Creative Commons license.
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Any chance you will post these as EPS files? I'd be very interested in designing futures fins and laser cutting them. I have access to a laser cutter.
Jimmy, I just uploaded a crude Futures 3/4" deep base as EPS. The base is a bit rough, but it should be a good start for you. I separated the fin into a few parts hopefully it will make it easier to work with. Although looking at the file on screen vs a fin in my hand, the fin as designed is pretty large. It looks bigger than a Futures F8, so you might want to scale it down. Don't forget that Futures side fins have the cant built into the base of the fin not the box like FCS. I think side fins are usually 5 to 7 degrees and quad rears 1 to 3 degrees.