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  1. Replies
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    Thanks. I was an early and consistent hassler...

    Thanks.

    I was an early and consistent hassler of Grain on the basis of their gayness and other limp wristed factors but their Chief Grainer made a few complimentary remarks about my work a few...
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    Halloween is ultra crass.

    Halloween is ultra crass.
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    I just followed the link on post one. ...

    I just followed the link on post one.

    Gentlemen you are correct, it's as gay as. Too many knees, they stand too close together, and it appears that it's some kind of fashion shoot pretending to...
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    Pictures please.

    Pictures please.
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    Thanks, I cut back when it's necessary. It...

    Thanks,

    I cut back when it's necessary. It wasn't.
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    https://www.facebook.com/roy.stuart.12/videos/1020...

    https://www.facebook.com/roy.stuart.12/videos/10206306080709393/
  7. It's easy and fun to play with these tools at...

    It's easy and fun to play with these tools at aitfoiltools, the first link is to a reynolds number calculator, it has a water temperature toggle on the bottom right of the page. The range of...
  8. Yeah basically one won't notice it in terms of...

    Yeah basically one won't notice it in terms of drag I shouldn't think ( although the added drag on the surfboard hull and fins is significant).

    The most noticeable possible difference is likely to...
  9. Take a good look this time: ...

    Take a good look this time:

    http://www.roystuart.biz/2015/10/does-water-temperature-affect-your.html
  10. Did either of you look at the changes in fin...

    Did either of you look at the changes in fin behaviour vs viscosity in the example given? They are big changes, whereas the difference in water density is so misiscule that it is insignificant. Take...
  11. Lol I'm too busy for that caper, and need to do...

    Lol I'm too busy for that caper, and need to do lots of testing and investigation before I even apply it to my own boards.
  12. That's for average salinity in 'salt' water.

    That's for average salinity in 'salt' water.
  13. The flow conditions are able to be analysed...

    The flow conditions are able to be analysed pretty closely as there are only a few variables involved.

    The change in water density between 3 degrees C and 20 degrees C is only 0.2%. On a typical...
  14. Serious question: don't you feel that you have...

    Serious question: don't you feel that you have let yourself down by constantly posting gross, boring, and repetitive so called jokes of the lowest possible kind?

    Only seriously retarded types...
  15. Think of it this way: No one would be in the...

    Think of it this way:

    No one would be in the least surprised if someone started a discussion about the difference in performance between fin sets which are almost the same except for some heavily...
  16. I'm planning to make some hand foiled versions in...

    I'm planning to make some hand foiled versions in G10, everything takes longer than expected though. I'm not sure if there's a mathematical formula for that or if it's just one of life's mysteries.
  17. There's a company in San Diego who can make a fin...

    There's a company in San Diego who can make a fin box which records lift and drag forces, price $14k.

    Better to test foils on the hull while surfing if possible.

    In the meantime the computer...
  18. This isn't about fin flex but I'm not surprised. ...

    This isn't about fin flex but I'm not surprised.



    There's no chance of that since i don't use FCS fins.




    It's definitely the case that it makes a significant difference for some fins...
  19. The thread title is a rhetorical question since...

    The thread title is a rhetorical question since it is indisputable that water temperature affects fin performance.

    The question in the first post is not rhetorical though as I'm interested to know...
  20. The polars for the foil used as an example here...

    The polars for the foil used as an example here have been calculated using Xfoil.

    http://web.mit.edu/drela/Public/web/xfoil/

    https://en.wikipedia.org/wiki/XFOIL
  21. Hi Brew That's not what i'm doing. To...

    Hi Brew

    That's not what i'm doing.



    To be sure fin drag is only one part of the overall drag but it is significant.

    The consequences are not just differences in lift/drag either... the...
  22. You are 100% correct, most of them have been...

    You are 100% correct, most of them have been based on foil shapes since 1996.
  23. That's a moral question, to which I don't know...

    That's a moral question, to which I don't know the answer. ;)
  24. Physics old sport.

    Physics old sport.
  25. Not necessarily since one of the consequences...

    Not necessarily since one of the consequences could be fin spinout.
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