my first paipo 44

[bgreen]

An alternative approach to carrying a paipo.

This board, based on John Galera's NoFin waverider was made by Jason Oliver. Photos show the basics of the mechanism

http://jasonoliverwoodensurfboards.blog ... oards.html

Swaylocks has lots of bisect posts

https://www.swaylocks.com/forums/better ... -surfboard

https://www.swaylocks.com/forums/anothe ... and?page=1


Photos removed from Pierre's efforts:

https://www.swaylocks.com/groups/portab ... l-mini-log

[Papa Paepo o]

Good morning. I do not know much English and I'm using the Google translator, sorry for the phrases that are not understood
I want to introduce myself, my name is Asier and I live in the Basque country. well known for the waves like zurriola, zarautz .. and good food, I live very close to the French coast

For years I surfed with short boards and longboards through egg, but I have changed my home and I do not have fast access to the beach, I have to go by motorcycle, a scooter and we are forbidden to take the surfboards

This has given me enough courage to change the modality to the paipo, which I was looking forward to, we have tides, waves and very unfavorable wind conditions for surfing but with paipo or bodyboard you can take a good test to those waves

with all this I have designed a paipo of maximum size that I can take in my small motorbike 44, to design it.
As I do not know much about this, I copied a photo of a modern bodyboard to solidworks Science Bodyboards Style on their page they also offer them, thank you very much for this detail. I have taken the measurements for this design, then I have added a rounded nose to give the look paipo that I like so much

design made of eps epoxy and fiberglass, paipo 44, can not be larger x 21.5. but not the thickness, volume or liters it has to have. my measurements are European 1.77 m tall the man to the ground 106 cm weight 73 kg

with a thickness of 50mm it gives me a volume of 24.3. 53mm 25.8l and 55mm 26.8l

is going to be a paipo for fast waves, waves from 1m to 2.5m but there is a brutal massification of surfers and bodyboard so it has to have enough volume to compete in the capture of waves, I know this is not very ethical, cordial , not nice, but in the water there are days of fights and punches

I do not know if you know these studies of hydrodynamics for surfboards. I have made a few surfboards with this form of songs and they are fantastic, the best I have ever tried. I passed the link of your page
http://www.cambersurfboards.com/home/ld-technical/

I have made a plan in solidworks of the project of paipo, the keels will go in boxes of longboard keels of 10 inches long that I have to spare

but I do not know where to put them, 5 inches starting from the tail, this is already entering into a fine detail, and even if it is not even if the model is correct

I'm willing to redesign the entire paipo if needed, I'm looking for an updated Austin Paipo design, for example, so I added this tail shape so typical of the boyboard

I want to thank you for all the information you share, it is a real pleasure to be able to read your experiences, I hope I also contribute something in this great forum

Well I see you getting help from the right group. Have you ever tried shaping and riding a wood board. It has a different feeling from foam surfboard. When you add skegs to what you call paipo is no longer a paipo. It becomes a kneeboard or bodyboard.

[zensuni]

Hi there, I'm from Bordeaux, in France too, I have been riding plywood paipos for a few years, maybe I can give you some tips from my short experience.
First I think you should consider testing on a simple plywood board, with no fins, just to make sure that you like the feeling of it.
To me, one of the best advantage of paipo riding is the feeling of speed, given by the fact that the flat piece of hard material (plywood or fiberglass) is skimming across the wave with very few resistance. Adding fins or extra concave may add extra control but also drag, and that's not something you want in small conditions.

Checkout my youtube channel, I filmed some tests I made: https://www.youtube.com/user/pantone95330/

[rodndtube]

Zensuni, where were those clips made? I did not fully recognize the area but my experience was limited to paipo surfing Lacanau Plage Nord, Carcans Plage, and Plage Gurp (interesting!).

[zensuni]

Zensuni, where were those clips made? I did not fully recognize the area but my experience was limited to paipo surfing Lacanau Plage Nord, Carcans Plage, and Plage Gurp (interesting!).

It seems you know the area pretty well
Some of them were made at Lacanau plage centrale, some others were made a little bit norther, at Royan, in the Gironde estuary. It is a spot where I often surf in the winter as waves are smaller there, when it is too big for me at Lacanau. Both are beach breaks, but waves are very different, Lacanau is open ocean so the waves are hollower and have way more punch. Royan with its gentle waves is perfect for testing new boards

[asier esnal]

my english is disgusting, forgive A few weeks ago I hurt my wrist working, I'm a boilermaker, I could not do anything of the paipo, to work hard and go to work. but I'm fine

 morning or past im going to glasser the paipos. I'm not very good at working with epoxy.

 I took a little time and with a 3mm aluminum sheet I made 2 fins. They weigh the same as the bee panel fins. and the sheet of 3 gives a very very good flexibility, the only downside is that they do not have hydrodynamic form

about the hydrodynamics and the effect in the turns I made a small study with the free program xflr5
  The result has been amazing. I do not appreciate differences between a sheet and a gora shape unless the thickness of the hydrodynamic fins has a thickness of at least 12%

in the photo I present a comparatiba of 2 hydrodynamic profiles, one of 3% and another of 8%, the 12 if it makes a difference but no keels are made so fat, so I have not added it because it does not confuse.

therefore a keel in sheet will have to give the same result as a traditional, that if, they are ugly to the eye, but very fast to do and very cheap

the fins shape is por paipo 2 meters waves. tomorrow I will make other 2 smaller and more vertical

[bgreen]

Good to hear you are feeling better and the boards are progressing.

You may need to explain the test results - I wasn't sure how to interpret them? Surffoils makes prototype fins in aluminium.

Have you looked at this site - https://www.finfoil.io/

Regarding carrying boards, these guys aren't cheap but they may do the job: http://koraloc.com/

[asier esnal]

Https://www.finfoil.io/ I use the solidworks program to design the keels, I can import photos and copy or modify them. I can also do basic hydrodynamics studies, the xflr5 program also does these functions and is free. very very good to design hydrofoils

The ends of a surfboard work exactly like the wings of a plane, and follow the same formulas

the wings when leaning at a certain angle exert a sustaining force, which makes a plane fly, but it depends on the profile of the wing and its speed, at a critical angle it stops doing an eject and goes into a loss or an auger,

that means that if a plane wants to take off in a very radical way to a vertical position it has many possibilities of falling to the ground

in the surf fins the same thing happens, when we do a carber swab, the keels drive the board, but if we make a turn I look for it, they stop doing it and a loss of traction is created, a skid a snap

in the graphic I have represented the profile of a normal keel and the aluminum sheet

on the vertical axis is the cl axis. this gives us the data of the strength that the profile makes,. in the horizontal axis is the angle to which the fins works

we see that at a greater angle the keel exerts more force but at 7 degrees both in the aluminum plate and in the traditional keel they stop working and the snap is created.

this gives me the conclusion that the aluminum sheets can be a good fast form and baraa to make central keels

as I'm always using the google translator, apologize for not knowing English, it's a pending task that I'm not good at

the 3.33 minute is the moment when the fins stops working and is created in snap
the previous section would be bleary for a lateral fins since a central fins when this parallel does not produce lift

https://www.youtube.com/watch?v=YDeQXPNpLeY

[bgreen]

I watched the video but came away wondering the applicability of the wing analogy. A plane mightn't be able to fly without wings but a BB can be ridden without fins. The forces and elements involved are so different. The concepts of drag, lift and angle of attack are relevant to board design, but to what extent? I have a mate experimenting with fins that have the reverse of normal foil.

[asier esnal]

I could not stand it. I had this form of fins on my head and I gave it 3mm aluminum. The idea is to reduce vortex as much as possible. Turbulence at the tip of the keel
the big one has 4.7 and the small one 4.5 inches, but its area is very different. mount 2 parallel to the central axis with a separation of 220 between them more or less

I have doubts to which distance of the tail to put them 3 inches is well? I think that is the standard?

I already have the 2 faces of the 2 laminated paipos, the week that has polish, mount us box .... I have a lot of work ahead

[Nels]

Beautiful fins and I appreciate the craftsmanship (used to work in an aerospace metal spinning and sheet metal business)...but they look frigging deadly! Just looking at those blades make my nuts crawl up the back of my throat...

[bgreen]

Nels,

Trranslated into Spanish you're post will make interesting reading. They do look lethal.

[CHRISPI]

Cross drill the fins layer 6 oz and epoxy filler and shape whatever foil profile finish with 6oz cloth much safer

[zensuni]

These aluminium fins definitely look like knifes to me, I hope I won't be in your way at the lineup

[GeoffreyLevens]

These aluminium fins definitely look like knifes to me, I hope I won't be in your way at the lineup

You won't be, no matter what. Even if you are you won't be heh-heh-heh

[asier esnal]

You have managed to scare me, I did not see it so dangerous but when more than 5 people tell me the same thing, it is better to rethink and look from another point of view

my fins have 3mm radius much fatter than the fins that are sold, the ones bought have really sharp edges, especially the part rasera, mine not
since I do not have a hydrodynamic profile, it is harder for water to do the coanda effect, the fins enter before lost, before they snap

I am a great admirer of the work of Roy Stuart and his fins printed in 3d, so I have encouraged to simulate this idea in my aluminum sheet, including my ideas
I've done a lot of simulations, the computer is suffering a lot with so much calculation, but I already have a significant breakthrough and I think it's worth making

I pass a photo that includes the plane of the fins and a photo of the hydrodynamic studies that I am doing. I have problems with the numerical results of the tests, I do not get the mathematical formulas right, but if I have good graphics with the turbulence they generate, something is something

[zensuni]

on

it is going to be a paipo for fast waves, waves from 1m to 2.5m but there is a brutal massification of surfers and bodyboard so it has to have enough volume to compete in the capture of waves

From my short experience, for stand up surfing, the more volume there is, the easier it is to catch waves, but that is not necessarily true with prone boards since you have to deal with your legs dragging in the water.
To compete with surfboards in terms of catching waves early, I think the most important is :
- the swim fins you use (Dafin swim fins are great for that)
- the ability you have to paddle hard with your legs
- the technic ! Push the paipo forward and swim, trying to be as flat as possible, just like you and the paipo were a single long board, then when you feel the wave catching you you can jump on the board, at this point the board will glide on the water surface and the volume won't help (only the surface will).

[asier esnal]

Thank you very much, you have given me ideas that I had not thought about, I will keep them in mind.

I am already moving slowly with the paipos, I do not have too much free time

At night I do not usually sleep too much, and my head torments me

Here I present a few ideas of keels, with new graphics that I have learned to make alive the tutorials of youtube

[nomastomas]

on

it is going to be a paipo for fast waves, waves from 1m to 2.5m but there is a brutal massification of surfers and bodyboard so it has to have enough volume to compete in the capture of waves

From my short experience, for stand up surfing, the more volume there is, the easier it is to catch waves, but that is not necessarily true with prone boards since you have to deal with your legs dragging in the water.
To compete with surfboards in terms of catching waves early, I think the most important is :
- the swim fins you use (Dafin swim fins are great for that)
- the ability you have to paddle hard with your legs
- the technic ! Push the paipo forward and swim, trying to be as flat as possible, just like you and the paipo were a single long board, then when you feel the wave catching you you can jump on the board, at this point the board will glide on the water surface and the volume won't help (only the surface will).

YES! I would only add that kicking helps to propel us but, just as importantly, it lifts the lower body into a better planing position. Also, the prone rider is "caught" by the wave, and paddles only to reach a position where being caught by the wave is inevitable. This position is where the wave is cresting or soon to be cresting. To successfully compete for waves, you must sit deeper than anyone else, and learn to turn-and-go no matter how steep the wave. The late take-off is our bread-and-butter, embrace it!

[GeoffreyLevens]

The late take-off is our bread-and-butter, embrace it!

Dare I say it? Oh what the heck...bread and butter and all you need to add is jam!