Does water temperature affect fin performance?

KR what's good bud? Gotta get back up your way soon. Probably will this winter!

 

i have slept on this and here's what i woke up to.

DUDE, if you're trying to calculate drag on the leading edge of the foil - you have to take into account the deviations of the curved area of the leading foil. lets say your fin is a 1/4 inch in thickness, you're not hitting the water flat anyway, you need the intgral between b/a in the foils f(x) dx, where dx is your 1/4inch.
this way you will find the exact relative contact surface. then multiplying THAT by the 1.88x(10^06) per m^2/s^-1 will get you the numbers you're looking for. either way.... I'm done with a threade where a question was posted but no answeres are sought. since you already know everything, right? don't forget to polish the fin, to reduce surface drag and thusly turbulence. that shott makes my back foot wiggle.

 

Don't leave. I am enjoying your replies. What I think it boils down to, is that Roy is trying to simplify a complicated system down to one basic equation to calculate Re. If you look up research papers on real world effects of Re on flow and performance, you will find some pretty lengthy calculations. I found one paper published in 1955, that has pages of calculations using different parameters. My thought on this, is that even simplifying to only looking at Re numbers would yield little difference, when you look at basic fin Re versus the whole board Re (because there is still a volume of the board in the water at all times).

 

A test using hydrofoils would keep the board out of the water long enough to take measurements

 

and a cup holder and a dry storage compartment so you don't get pitted...

 

Can I have brads?

 

Good thread but a lot of nerdy stuff being thrown around, you smart guys figure it out for me so I can buy the best possible board / fin setup. Thanks nerds, we need youse guys! Really looking forward to the heated surfboard, could really come in handy here in FL <grin>

 

I have a 9'0" Mindless longboard that is dark green. It gets sooooo hot. I've had delamination problems. Sometimes I have to hit the shower before paddling out if I have strapped it on the roof. Wax melts fast. It's a heated surfboard. It comes in real handy down here in Florida. And the guy who made it, Eddie Suxberry, is in Melbourne Beach,FL. He has earned his moniker. My daughter won it in a Betty series event 18 years ago. I would never get a dark colored board, but it rides great (single fin, lots of rocker) and free is good.

 

Considering I've never even seen Roye do a turn, I will take everything he says about finnes with a grane of sault.

 

Yeah, my blue WRV FunFish gets extra hot and has a little delam from the heat, but it still rides out, but I know what you mean. All my other boards are white, probably never get a dark board again honestly, unless of course it's free like you mentioned!

 

To answer your original question, I don't feel a difference in fin performance in cold vs. warm water. I think the fact that a 4' wave in cold water has more power than a 4' wave in warm water (all other factors held constant) overwhelms the difference I would feel in fin performance. For me, it's imperceptible, but there is likely a difference if you took the water flow/fin interaction out of context and looked at only that.

 

boom. solved. thread closed

 

He always keeps them in his mouth for warmth

Of course he is, did you just meet The Gnome?

It's the lube he uses on his sheep's ass.

Funny!!!

Funnier!!

Funniest!!!

Damn Straight^^^

 

Roy was this a rhetorical question you are asking? Are you going to give us the answer at some point but you just wanted to get some discussion on the topic before dropping knowledge on all us simple folk?

 

omg this fvcking nerd sh!t

i've changed out my fcs ii's (glass flex vs carbon) and could not tell any difference at all.

none. zero. you can't either. don't even come on here and say you can. i will lose my fvcking mind on you.

also, if you think you something like temp is going to matter you are retardid

 

+1 HAHAHA, water temperature is the first thing I think of when I'm up and riding a wave, it's so important. Too cold? No worries, I'll throw in my FCS TC Aqualines, too warm? I got this, I'll throw in my FCS MF-1's (Mick Fanning's), problems solved!

I thought so, either way, good to see you around, as retarded as you can be (and sometimes not so retarded), it makes for interesting debate and some good ole fashioned hate sessions.