Search found 155 matches

by SURFFOILS
Tue Jun 06, 2017 7:18 am
Forum: Paipo Board Design & Building
Topic: SR-72 canard H fin
Replies: 18
Views: 4032

Re: SR-72 canard H fin

Crisps, that's just the hottest looking board ever !
by SURFFOILS
Sun Apr 30, 2017 5:20 am
Forum: Paipo Board Design & Building
Topic: Design evolution - part 1
Replies: 30
Views: 6955

Re: Design evolution - part 1

Hi Bob, I see the trailing edge as the last buoyancy of the board. As you slow it naturally drops at the tail but by keeping the tail as thick as you can it delays that drop so you get more projection, especially off the wave into a channel or over a flat spot. CHRISPI, your boards just kill me. I l...
by SURFFOILS
Sat Apr 15, 2017 3:31 am
Forum: Paipo Board Design & Building
Topic: Design evolution - part 1
Replies: 30
Views: 6955

Re: Design evolution - part 1

Interesting you mention a thin trailing edge, I found that a thicker trailing edge gives more run out onto the shoulder.
I like volume, flat bottoms, soft front rails and squared off trailing edges.Not very fashionable, but it's maximised for speed.
by SURFFOILS
Wed Dec 21, 2016 5:16 am
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

More testing today on my DIY paipo. Lots of good things about the new fin design but there's always more to discover.
New fins to come...
by SURFFOILS
Tue Dec 20, 2016 7:43 pm
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

I'm enjoying how these fins ride. You don't have to design them like a Wing added onto a plane but more like an individual entity, it is its own craft. The central area is like a foiled fin but the angled sides are thinner and designed to provide a Newtonian hydrodynamic effect. They're very stable ...
by SURFFOILS
Tue Dec 20, 2016 7:31 pm
Forum: Paipo Board Design & Building
Topic: New H fin board
Replies: 39
Views: 5657

Re: New H fin board

All these foils are from the same design foil from the Air Chair and that twin foil design comes from the Big Front Wing and Small Tail Wing concept from airplanes. Th bigger foil/ wing gives the majority of lift and the rear foil/ wing adjusts the AOA of the front foil. So the efficiency of the rea...
by SURFFOILS
Wed Dec 14, 2016 8:51 pm
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

Bob, I've had them out in beachbreaks from dribbler to head high on a glass paipo and a surfboard and it's the same experience of lots of drive for little effort. Standard surfboard fins try to be good at everything but this one is just for getting down the line with the least effort. The posts on t...
by SURFFOILS
Wed Dec 14, 2016 7:09 am
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

Thanks for the question Bob, yes it's a 'Floating' fin, the idea is that the base of any fin constantly interrupts the flow along the hull and it adds massive drag, more drag than is needed because you can turn a surfcraft without a fin but we all have these big base fins. However if you lift the fi...
by SURFFOILS
Wed Dec 14, 2016 6:03 am
Forum: Paipo Board Design & Building
Topic: New H fin board
Replies: 39
Views: 5657

Re: New H fin board

Wow, they look great ! Ever thought of retailing them ?
by SURFFOILS
Mon Dec 12, 2016 6:35 am
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

Only 4 mm thick but because of the bends it's not going to break.
by SURFFOILS
Fri Dec 09, 2016 4:49 am
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

So I've vacbagged layers of glass and veneer over the foam mold and when it's set, pop it off the mold and it's ready to shape. If you put the same number of layers of glass together it wouldn't be as strong as when you separate them with the veneer.
by SURFFOILS
Thu Dec 08, 2016 5:14 am
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

I'm really caught between spending ( wasting ) my time building either the twin blade or the Floating fin designs. The Floating concept is the most interesting so I'm sticking with that until I see something shiny that distracts me. Here's the latest... My idea is that if I can get the 'fin' away fr...
by SURFFOILS
Sun Dec 04, 2016 3:28 am
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

The Flume will be good to visualise how the water flows around each design over a range of angles. They all look smooth at 0 deg, but it's at what angle the flow starts to become turbulent and how it then flows that will bring a lot of insight. And all the specialty fof no like the Starfin, the Supe...
by SURFFOILS
Fri Dec 02, 2016 3:08 pm
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

That would be interesting , having standard surfcraft fins that rotate into horizontal hydrofoils. :)
by SURFFOILS
Sun Nov 27, 2016 2:55 pm
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

Hi David, I'll certainly contact you when they're ready. Fins are like anything else , they all provide a different experience.and maybe a different fin won't make you into Slater but it will be interesting to ride and give you a different understanding of how fins work. Here's another of my fin des...
by SURFFOILS
Wed Nov 16, 2016 8:32 pm
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

The biggest problem is dealing with the massive volume of water coming out of the pump. I stood it in a bucket and flicked the switch and it shot a geyser about 20 feet in the air. Hmmmm....
by SURFFOILS
Sun Nov 13, 2016 6:02 am
Forum: Swim Fins, Skegs & Other Paipo Gear
Topic: Fins of a New Generation.
Replies: 22
Views: 4590

Re: Fins of a New Generation.

The best way to test fins is in the surf but I'm building a Flume or a hydrodynamic water channel to test how water flow interacts with fins. It's 8 feet long and uses a pump to provide a smooth but fast flow to see how different fins interact at different angles.
by SURFFOILS
Fri Nov 11, 2016 8:41 pm
Forum: Paipo Board Design & Building
Topic: New H fin board
Replies: 39
Views: 5657

Re: New H fin board

They are magnificent boards to look at , I can only imagine how fast they are to ride. As for the angled front section.. my story is that I tried every different version of traditional foil design that I could find, all sorts of materials, conventional scientific theories for several years. then I t...
by SURFFOILS
Thu Nov 10, 2016 5:26 am
Forum: Paipo Board Design & Building
Topic: New H fin board
Replies: 39
Views: 5657

Re: New H fin board

I think you don't need that angled surface to get on the plane.
I'd buy them all if I had the chance !
by SURFFOILS
Wed Nov 09, 2016 10:17 pm
Forum: Paipo Board Design & Building
Topic: New H fin board
Replies: 39
Views: 5657

Re: New H fin board

Can you explain about these front sections , they look angled ?