LOGIN | REGISTER

Page 11 of 21 FirstFirst ... 910111213 ... LastLast
Results 101 to 110 of 202
  1. #101
    Join Date
    Jul 2013
    Location
    York Maine
    Posts
    746
    Images
    7
    Clemson my mind is trained to think and I believe the fin is just fine. Remember that I don't have slashing and competition style menuvers in mind. I want speed. The annular wing has the least Ammont of induced drag which is drag caused by the end of an aerodynamic appendage.. Turbulence which increases with speed. The tunnel does have more skin friction drag but skin friction decreases with speed while induced drag increases with speed. So I would think that a closed loop annular wing fin would be conducive to achieving better speed.

    I'm basing these statements off research about annular wings and also reading the history of surf fin experimentation. All of which are siteable.

    It's hard to step out of the box sometime.

  2. #102
    Join Date
    Dec 2007
    Location
    Charleston
    Posts
    1,436
    Images
    8
    Quote Originally Posted by Charles Taylor View Post
    Clemson my mind is trained to think and I believe the fin is just fine. Remember that I don't have slashing and competition style menuvers in mind. I want speed. The annular wing has the least Ammont of induced drag which is drag caused by the end of an aerodynamic appendage.. Turbulence which increases with speed. The tunnel does have more skin friction drag but skin friction decreases with speed while induced drag increases with speed. So I would think that a closed loop annular wing fin would be conducive to achieving better speed.

    I'm basing these statements off research about annular wings and also reading the history of surf fin experimentation. All of which are siteable.

    It's hard to step out of the box sometime.


    Ok. I've learned not to argue with a stewartonian when they tell you they're right. You're making a board for how you want to ride and that's good enough for me.

  3. #103
    Join Date
    Jul 2013
    Location
    York Maine
    Posts
    746
    Images
    7
    Haha I'm not a pure stuart minded guy. I love my 10' surf tech long board which uses single fins thrusters and ever a quad set up. I just like what feels good. Behind a motor boat the tunnel feels good. But it is fact that they have less induced drag I'm not making that part up so have some faith in eccentric thought. You as a hws guy should be all about this kind of stuff

  4. #104
    Join Date
    Jul 2013
    Location
    York Maine
    Posts
    746
    Images
    7
    Quote Originally Posted by ClemsonSurf View Post
    Please let us know right here on Yankee's thread just how the board surfs on a decent wave.

    I would really like to keep the critique of this board within Yanks direct attention. I think it could be hilarious.

  5. #105
    I remember when people thought Gruvi was Yankee. Fun times here.

  6. #106
    Join Date
    Jun 2011
    Location
    Science mother****er
    Posts
    2,795
    Quote Originally Posted by Charles Taylor View Post
    Clemson my mind is trained to think and I believe the fin is just fine. Remember that I don't have slashing and competition style menuvers in mind. I want speed. The annular wing has the least Ammont of induced drag which is drag caused by the end of an aerodynamic appendage.. Turbulence which increases with speed. The tunnel does have more skin friction drag but skin friction decreases with speed while induced drag increases with speed. So I would think that a closed loop annular wing fin would be conducive to achieving better speed.

    I'm basing these statements off research about annular wings and also reading the history of surf fin experimentation. All of which are siteable.

    It's hard to step out of the box sometime.
    Please, for the love of gad, could one of you Stuartfanboys show me even a basic fluid model of this thing and why they think it will perform better than other designs? Roy always enjoyed arguing the point, but never seemed to do any modeling. In my short time working with fluid dynamics in college, I could easily show how an airfoil would perform. The issue I see, is that most of the people copying Roy, don't even really understand Roy's designs. RS is good at talking the talk, so they don't seem to want any real data. Not saying it doesn't work, but I would like to see a reason why.

  7. #107
    Join Date
    Jun 2011
    Location
    Science mother****er
    Posts
    2,795
    Quote Originally Posted by Charles Taylor View Post
    Haha I'm not a pure stuart minded guy. I love my 10' surf tech long board which uses single fins thrusters and ever a quad set up. I just like what feels good. Behind a motor boat the tunnel feels good. But it is fact that they have less induced drag I'm not making that part up so have some faith in eccentric thought. You as a hws guy should be all about this kind of stuff
    Pulling a board behind a boat is a completely different feel, and requires a completely different design, than surfing on a wave. Thus the difference in wakeboard designs vs surfboard designs.

  8. #108
    Join Date
    Jul 2013
    Location
    York Maine
    Posts
    746
    Images
    7
    Quote Originally Posted by brewengineer View Post
    Please, for the love of gad, could one of you Stuartfanboys show me even a basic fluid model of this thing and why they think it will perform better than other designs? Roy always enjoyed arguing the point, but never seemed to do any modeling. In my short time working with fluid dynamics in college, I could easily show how an airfoil would perform. The issue I see, is that most of the people copying Roy, don't even really understand Roy's designs. RS is good at talking the talk, so they don't seem to want any real data. Not saying it doesn't work, but I would like to see a reason why.

    To be perfecty clear I've never said it will work better. I'm simply a curious animal who understands the theory. The theory which I've stated is all about induced drag and skin friction drag. Also the theory is based around a feeling you will get in the water such as minimal rail to rail roll resistance, in some cases but not mine ( due to the foiling done to my fin) tunnels will help the tail plane, my tail is very wide so this really doesn't apply. Like I said I'm a curious animal. Aren't we all? Also Remember I do not anticipate the performance to exceed or compare to a thruster or quad not saying it's worse it's just competely different.

    As for Roy's designs they Are disigned for pure surfing so forget any stigmas you may have with his board. They don't nose walk and they don't make performance style menuvers but they do go fast and they do look good. Me personally, I'd rather have a board that's fast and functional in the sense of wave catching ability and pure surfing.

    Do I test my tunnel fin in an air lab ? No. Do I know how aerodynamics and lift works? Yes. I know that the tunnel gives me a strong angle of attack and I know that it feels good behind a boat for now.

    I will continue to update people on my curious experience with the tunnel fin right here on yanks thread.

  9. #109
    Join Date
    Aug 2012
    Location
    Turtle Island
    Posts
    5,645
    Images
    6
    Hey Yankee's the type of guy who stops the car to let his fellow man cross the street.

  10. #110
    Quote Originally Posted by eatswell View Post
    I remember when people thought Gruvi was Yankee. Fun times here.
    I wonder if this is a Gruvi sighting


    Tom C. of Pungoteague looks over the beach Monday after a morning of surfing at the Chincoteague National Wildlife Refuge on Assateague Island. The busy summer season is coming to a close, but Cooper will surf year-round - one of the perks of being a local.