Thrailkill wrote: In many instances a board is hampered by poor fin design, or improper fin placement.
In many instances a board is hampered by poor fin design, or improper fin placement.
For those that have eyes to see and ears to hear. Read Bill’s statement out loud and listen. He’s given us all a piece of gold for free.
Gotta love that guy!
Hey DR, glad you chimed in on this thread, and I couldn't agree more..
Just thinking out loud, what do think one of these fin set ups would look like in a Penetrator?
I have attended 2 of Bill’s get-togethers so am familiar with the concept. And do have this on my to do list… always adding to the data base. But, I’ve got a lot on my plate right now.
It’s an easy retro fit however I currently don’t have a Penetrator or any other board that I’m willing to retro fit right now. I’m sure it will change performance characteristics. That said and me being me, I’ve got to test stuff at least for my own knowledge base before I make anything available.
Speaking of fins. John Peck does have his own fin design available now; you may want to go with that on your board.
Do I remember right that you’ve used this set up with single foiled fins and the flat side out?
You do remember correctly. Single foiled fins, flat side out. However double foiled fins work just fine. the single foiled fins are the extreme extension of the theory of how the system functions. The fun of the single foiled fins is that they really mess with peoples mind, when they see them. It violates what they think they know about how fins and surfboards work.
Considering will how long it takes to lay out and rout out two additional fin boxes, plus the risk if weekining the tail, it would be easier to fabricate a double fin that would fit into an existing single fin box. There would be issues with respect to their connection, but with a little thought and some R and D it could be done.
more time to fabricate a fin than to route out a box?
I'm not sure you could make a fin that would be strong enough without having some sort of bump where they are set into a single fin box.
I routed out all three fin boxes and set them all at one time. I have 1/4" strips of Balsa wood running perpendicular to the fins under the skins. The balsa attaches to the top and bottom skins for strength, and they go past the outside edge of the boxes. The 3 boxes were glued together once I set them in the board, so the whole thing ends up one solid block. Not sure, but I think that gives the boxes a bit more strength. I think you could route a couple of small holes all the way to the top glass on a PU board and get the boxes attached to the top, like FCS fins.
FYI... I ran into a guy at the beach named Carlos who said Dave Parmenter is his brother in law. He was very interested in the Compsand aspects and I explained how I made the board. I also told him that the guy who taught me how to make the compsand (CMP) did balsa skins on boards for Parmenter. Carlos has seen those boards. It will be interesting if he tells Dave about the fin setup and then Dave tries it.
I got a couple more on that board this morning and am sold.
I really want to try it in a shorter somethingorother for the beach breaks.
soooo....looks interesting. Now would you be able to reduce your "normal" single fin size or use a differently raked/shaped fin? Or do you just slam another of the same on your tried and true original fin set up? Photos look like "normal sized" fins, but with all the drag and slightly offset center line placement, would reducing fin depth add or subtract from performance? It's not like you've added a second fin (like a front tri/twin/etc) set out on the rail where turning and pivot point seemingly would be effected by addition of another mate out there?
hmmm. any ideas or theory. I'm looking and thinking I'll give it a try (?), some of the info in the thread lends me to believe I most likely don't know much about fins in general but I'm open to trying most stuff a few times. Need a new longboard soon anyway.
thanks for the interesting mind diversion.
these are smaller fins than I would have run in it as a single by about a couple inches in depth.
I should try these as a single and see how different it feels, but I fear I'd have to push it all the.
way back in the box to get the requisite over-rail surface area.