anybody try this yet?
I have one but have not riddden it enough to make a decision
thank-you.
i kinda wanna use it on my 7.0 stub and spud boards...
time to get the bondo out on one of my greenough fins…
bullet on the base and turbucles on the leading edge.
hello, light speed!
i have one coming so i guess i'll give some feedback for the rest of you.
well..got one..put it on my 8.6 frankenspud(dane perlee shape)...
and the fin works....
i have tried alot of fins on this board, and this fin seemed to
give the board another gear...kinda slipperly speed..
i'm gonna try it on my 7.6 liddle hull...next...
I thought I saw Gene Cooper use a similar hump on a couple of his boards a while back. Same type of application?
same fin.. i believe he puts them on his boards,
check the bulletfin and cooper websites to be sure..
There is so little actual science in surfboard design. Its hard to tell whats bullshit from whats real. These fins are interesting though!
i know there so much chafe... it's hard to tell what is wheat...
but the bow wave science is solid
me i go on feeling..mr liddle taught me that...
since it was puny today(da waves)
i tried it on my 9.6 today...and i got the same good feeling...
so next i'll try it on a 7.6 liddle hull,..
then a 7.0 stub..then a 7.0 spud, then a 6.6 moonfish.
..it'll be fun, and who knows ...maybe i'll learn something..
nice pic...and info
thank-you
from the website:
The Science...
Just as with the bow of a ship, the traditional surfboard fin creates a wave as it displaces the water in its path. The resulting turbulence places drag on the surfboard.
The bulb of the Bulletfins™ greatly reduces this drag by creating a new (primary) fin wave in front of the original (secondary) wave. This new bulb wave is designed to be nearly 180 degrees out of phase with the original fin wave to subtract its turbulence thus reducing fin drag.
The result is a fin that gets more efficient as you approach the surfboard's optimal hull planing speed.
HOW IT WORKS...
Bulletfins™ riders report increased speed and drive from their boards and reaching planing speed more quickly.
What's going on? ....
The Bulletfin's patent pending bulbous design is based on 50 years of experimental Naval Architecture and applied hydrodynamic research on the bulbous bow hull design. The bulbous bow is now the standard hull design for many types of ships.
yeah..i saw that page..
thanx
They seem to have less drag and give better edge control. Was a skeptic but then I did lots of side by side testing with great results.
ditto..thanx gene..that is definitely a clearer description than mine..
surfed it on my 6.6 moonfish(6.6 x 25 x 3 1/8)
and it worked well too...go figure..
this board also works well with that 12" orange spoonfin from thalia surf shop..
three for three now in board(8.6, 9.6, and 6.6) lengths.
I have a hard time understanding how this wave behaves under water, turbulence I can understand, but that wave is a little harder to get into my thick skull. I’d like to see the math and physics behind this, how much turbulance the fin creates, at what speeds the fin turbulense still effect the bottom of the board, how much drag this produces and how large part of the total drag this is. And I want to see the test tank footage before I buy into it.
The explanation reminds me of the commentary about tandem leader fins increasing the efficiency of the trailing main fins.
i suggest you contact ron( the designer) through the bulletfin website,
i'm sure he can help you.
all i ( and mr. cooper...a very respected shaper..i might ad))can tell you
is it has worked very well for us..
we can "feel" the difference..
and it is no exaggeration saying i am a fin..."addict"...
i would be happy to send you pics of my boards/fins
just PM your e-mail..
in the end..only you can be the real judge of what does or doesn't work for you...
but...sometimes like the campbell bros say about the bonzer is..you gotta have faith/belief......
Well there’s the drag discussion then there’s the discussion about the mini Coanda effect sucking the tail down. All theory until the rubber hits the road when surfing. If tank tests are what blow your skirt up then I know Ron would provide a fin in trade for some test footage. Although I’m far from being a technoid, it would be very interesting to see why the addition of this little bulb seems to make such a difference.