RealSurf Surfers' Forum

I could kill a man with that thing.

I'll take two.

Nice design... If you lose it, it'll come back to you..

Mall benches, wax combs and now IUD's! There's no stopping you Roy.
Love your work.

Yep that's the fin it's based on, the original has a very poor foil though and of course no leading edge bumps, plus ours is only a fraction of the weight of solid glass.

Roy_Stewart wrote:......... the original has a very poor foil though .

according to who ?.....never heard complaints from any McCoy riders....

Obvious Kiwi rip off of the boomerang. They'll be claiming Pavlova next.

looks sweeet Roy.

I've got a normal gullwing in my mccoy single. What's the advantages of yours roy? Layman terms, if you please

steve shearer wrote:looks sweeet Roy.

Why does it look sweet to you Steve? What positives do you recognize in the design elements of that fin?

godsavethequeen wrote:What's the advantages of yours roy? Layman terms, if you please

It doubles as a bush saw.

well I've been testing the spitfire version and I'm impressed with the weight, foil and flex, as well as the overall design. The fin performs very well.

I already have a McCoy with a gull wing so It would make a perfect blind test against a fin I know already works well.

Also, excited to test that gullwing in other single fin based designs to see how it goes.

Ok . So does the gullwing design in general differ from a more standard type fin ?

kayu wrote:

Roy_Stewart wrote:......... the original has a very poor foil though .

according to who ?.....never heard complaints from any McCoy riders....

Not all McCoy riders prefer the Gull Wing as I'm sure you know, the foil could be part of the reason.

Anyway foil design is well researched and the McCoy original I have in front of me has several known issues, which to be fair are in common with a large percentage of single fins:

1) a flat area through the middle of the chord, this produces bumps or corners in the curve fore and aft of the flat area.

2) an overly large leading edge radius, this causes drag.

3) a rather thin foil, again common to many singles, this reduces ability to turn through tighter arcs and encourages spin out at higher angles of attack.

4) It's just not a well worked out foil, it's a standard sort of result typical of fins ground out by disc sander particularly those which are on a box base since this makes proper foiling more difficult.

steve shearer wrote:well I've been testing the spitfire version and I'm impressed with the weight, foil and flex, as well as the overall design. The fin performs very well.

I already have a McCoy with a gull wing so It would make a perfect blind test against a fin I know already works well.

Also, excited to test that gullwing in other single fin based designs to see how it goes.

A realsurf member's discount?

Roy, a friend of mine surfs a modern adaptation of MP's famous cutty board. Its around 5'9" x 20" x 2 3/4" with modern bottom and foil. Looks very similar in planshape to the old MP board. Its one of Mark Pridmores MP3's.

What size and foil shape single fin in your range would you recommend him to try in that board? Its designed to be a 2+1, so the tail a tad wider than a pure single fin. If that changes your advice.

Thanks!

godsavethequeen wrote:I've got a normal gullwing in my mccoy single. What's the advantages of yours roy? Layman terms, if you please

It should have way more drive and much better control, as well as less drag and less weight.

Good looking too.