I guess I was a little slow on figuring out that play on words. Thanks to my daughter, I get it now. Those crotchless leotards are comfortable, I’ll —>wear<— them under my wetsuit because it really makes it easy to slip on and off.
Rocky I think you should proof read everything you have posted. Because I think your spelling is worse than mine. Dick!
Mitch, yep me spelin is shite, me huma evin werse, an I is a dic, as mani haer wood agrii…thancks for remindin me!
Rocky
You’re welcome
Wow Rock, I'm impressed! Might have to nominate that Board into the Rock and roll hall of fame.
Atz,
hey your’e on the money there dude, it was last seen in Flyod’s possession and rumour has it the groupies queued up to get laid on it, prolly trying to climb that stairway. Someone told me (very reliable source, as you would expect from me) that Mr Jackson borrowed it occassionally and did a bit of moonwalking on in late evening secret seesions in Socal and that he nearly drowned in one session when his “Pinkie” got sucked into one of the vents when carving a cuttie while struuting out “can,t stop 'till i get enough”.
Word has it MJ (dudes always called him that, or ‘button’ because of his cute little nose) panicked over this incident and was experiencing trouble sleeping, luckily, his doctor was on hand and was able to get a few tablets into that really calmed him down, big time. Well the spectre of Stairway… rose from the ashes (excuse the pun) and MJ prolly rode her on his final journey.
So there you have it kiddies, another nod time story from uncle Rocky…now shut the Fu&k up and go to sleep!
Friend to the stars, Rocky.
Over the last 40 years I have shaped and glassed several “airfoil” boards, probably due to seeing the same Tom Morey article. They do work to reduce the wetted surface of a board, reducing friction and allowing more speed. I think it is the Bernouli principle at work (pressure differential) that causes the suction of air to the bottom. A step is needed in the bottom and the ports must be aft of the step, but a severe concave is not required to “trap” the air, and the air in fact reduces the concave’s affect by eliminating the pressure difference (suction) induced by the concave. I favor a bonzer fin setup with the airfoil, they just work together.
The biggest problem with these beasts is glassing them, what a pain. The easiet method I have stumbled onto is to glass the board as normal and drill the holes after the hot coat. Then spiral glass wrap some straws to form tubes. Once they set peel out the straws and put the tubes into the holes you drilled and pour in resin to bond them in place. Once that goes off you can sand off the excess tubes and clean it all up…
Hope this info helps someone
Keep experimenting…
C’mon Mitch…that aint no shaping bay it’s a operating theatre at the local hospital that you hired for the shoot…no self respecting shaper on earth could have a shaping bay like that!! Gotta be venting air out ya arse if ya expect us to believe that photo!
Hey …just a thought…might make a good sound recording studio…I will gat onto Flyod and gat back to you…
Rocky
What do you mean by “airfoil” boards? Define airfoil as you have built it in a surfboard.
The photos were taken a year ago. I swept up the room just before I took them. Are you really going to bag on me for sweeping out my room now and then, serous.
C’mon Mitch…just ribbin ya…good job on the room and the craftmanship on the board matches your sweeping skills…very bloody nice and clean lines
Rocky
Thanks
According to most definitions an airfoil is a wing. Operates by pressure differences due to moving fluids (air, water, etc).
Some Airfoils are small pucks that use an air bearing to reduce friction so they slide around very easily. Ever play air hocky? The puck is an airfoil - little to no friction.
My Airfoils boards use a sharp step in the bottom deck, that includes ports to the top deck, in the step. Others have posted what the step looks like in cross-section. The water moving over the step causes a pressure differential that sucks air in from the top. As I mentioned, once the wetted area is reduced, so is the friction.
Just a different name for the same thing… 
Hope that helps…
The response is appreciated.
I was thinking higher velocity flow (less dense medium) over the top surface and lower velocity flow under the bottom surface (denser medium), creating a pressure differential.
Actually you’re correct. A wing uses this principal to enable a plane to fly. The top of the wing is really sucked up due to the forward motion thru the air.
In our case we’re just flipping it all over and allowing the air to relieve the pressure differential.
Been following this thread since I shaped my own inducted board and wanted to throw in something. I’ve had 4 or 5 people ride my 6’5" inducted quad and the have all mentioned the same thing… A strange turbo type boost of speed. A buddy of mine that first noticed the “phenominum” said that he actually fell off the board because, as he says, “It felt like there was a sudden rush of speed out of now where, kinda like a turbo boost”… This is a guy who I’ve known and surfed with since the early 70’s, he is a seasoned vet and has surfed everywhere, so I trust his word when it comes to surfing.
I recently sold the board to a guy up in the LA area, he just sent me an email about the board just this evening. Here is an excerpt from his message as it applies to the board;
“So far i’ve surfed in many different conditions from here down to south SD. There is a magical area up near my front foot cant pinpoint it yet’ but when i get there the board straight flies. I remember you telling me that as friend noticed the same thing’ I found it too when i go left (my back hand) once completing a bottom turn it is a little tight but once i release up at the top the board explodes. what a great feeling i can then lock it back on rail and continue down the line. On my forehand the board responds almost immediately hitting closeout sections the board holds it own, super fun”
I’m just wondering if anyone has ever run across this same weird situation? I wish I better understood what was happening on the botton of that board that makes it kick in and just haul a$$…? I would’ve thought that there would be MORE wetted area (I put the holes in at the heads of 6 concaved channels) because the low pressure cavitation would (should) be eliminated from venting… Hell, maybe I have no idea what the hell I’m talking about, but I do think there is a future in a combination of induction AND finless designs such as the one that Tim Bessell came up with here http://www.youtube.com/watch?v=FKeg8JAwzbw
In anycase, I’m getting a kick out of watching the bantering that is going on in this thread…
Regards,
Bob Robertson
San Marcos
Finally got around to taking some photos of this board… My first attempt at a resin swirl also…
[img_assist|nid=1062589|title=air foil board|desc=|link=none|align=left|width=100|height=75][img_assist|nid=1062591|title=air foil board full view|desc=|link=none|align=left|width=75|height=100]
Hope they’re not too tiny…
about time,
someone has finally...............caught on.
herb