paulownia + polyester+ fiberglass: rocker and flex

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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby asier esnal » Tue Dec 11, 2018 4:41 pm

Does not have any model leashes? and if a very fat wave comes and you lose it? you drown? :shock: :oops:

es
no tiene ningún modelo leashes? y si viene una ola muy gorda y lo pierdes? tu te ahogas?
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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby zensuni » Tue Dec 11, 2018 4:45 pm

I had a krypt surf mat for 2 years, I loved it, the learning process was quite hard (that was the "side slipping" part I was referring to), but after a lot of sessions I was as confortable rinding the mat than my paipo or my bodyboard. Then the krypt mat was destroyed (my fault), I bought a 4gears flyer omni surfmat, great quality mat, but this one is slighty bigger than the krypt, so now I have to get used to again (hello again side slipping).
To my experience, mats may not look fun to watch, but are great fun to surf, it is a different glide, very subtle, kind of a "zen" thing.
The downside is that it is difficult to duck dive a surf mat effisciently, so if no channel, paddling out can be a problem (no leash). But this is partly balanced by the fact than in case of wipeout you just "bear hug" the mat, you won't get hurt.
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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby rodndtube » Tue Dec 11, 2018 4:51 pm

Apparently wind is more of a concern than a wave, and duck diving is not easy.

asier esnal wrote:Does not have any model leashes? and if a very fat wave comes and you lose it? you drown? :shock: :oops:

es
no tiene ningún modelo leashes? y si viene una ola muy gorda y lo pierdes? tu te ahogas?
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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby zensuni » Wed Dec 12, 2018 5:25 am

asier esnal wrote:You said it right, there are 2 parallel longboard fins.


I wonder how this setup would work on a paipo, and in general, how single fins work on paipo boards
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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby rodndtube » Wed Dec 12, 2018 6:54 am

Single fins work, I rode a single fin paipo for a long time, during the late-1960s, 1970s, until maybe mid-1980s. On the other hand, the tail was somewhat narrower that what I evolved to with 3- or 5-fin setups. My single fins usually ranged from 8 to 6 inches, going smaller over time, and now I generally use a 4.5 inch center fin with two small side bites or 4 small runners (Bonzer).
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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby asier esnal » Wed Dec 12, 2018 6:57 pm

zensuni wrote:
asier esnal wrote:You said it right, there are 2 parallel longboard fins.


I wonder how this setup would work on a paipo, and in general, how single fins work on paipo boards


These are the first 2 paipos I did, with the configuration of 2 fins of longboard, but as I did not have money to buy so many keels, I made them in aluminum, the behavior is somewhat slow in turns, they give the feeling of boring, very reliable and safe but boring, so move to side fins looking for more fun behavior

es
estos son los 2 primeros paipos que hice, con la configuración de 2 fins de longboard, pero como no tenia dinero para comprar tantas quillas, las hice en aluminio, el comportamiento es algo lento en giros, dan la sensación de aburridos, muy fiables y seguros pero aburridos, por eso pase a quillas laterales buscando un comportamiento mas divertido
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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby rodndtube » Wed Dec 12, 2018 8:07 pm

The really smart people would talk about characteristics of a fin's shape, height, base length and "rake." And where it is positioned on the board. A standard long board center fin is not conducive to easy quick turns/pivoting, so it can feel stiffer. But the fin is good for projection. Even those little knubsters, with their long bases, are conducive to helping project in one's turns, those longer arching turns.

A good center fin box where one can move a fin forward and aft also provides flexibility for adapting to varying wave conditions.
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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby asier esnal » Thu Dec 13, 2018 5:26 am

I have not put the measures of the keels for not extending myself in the story, since this post is oriented to the manufacture of paipo with paulownia and polyester. but if you want to comment, i do it

first I designed some fins SF-4 PC Stretch Quad Set scaled to 4.5 high, I did not like the behavior

the fins that you see in the fiber paipos are inspired by the models of windsurfing, not surfing, they work with very interesting models that I wanted to try. Before manufacturing, design different fins in 3d to understand how the forces and turbulences they generate work. From this study I drew the conclusion that the models were close to what I wanted https://www.k4fins.com/product/zbd/ https://www.k4fins.com/product/rocket-fronts-trailers/

blue paipo, height 4.5 base 4,
paipo garnet height 5.5 base 4.5
I do not know the sweep angle. the garnet is more delayed than the blue, these designs were the ones I liked the most when making the 3d but I do not remember it. delete the file


es

no he puesto las medidas de las quillas por no extenderme en el relato, ya que este post esta orientado la fabricación de paipo con paulownia y poliester. pero si quieres lo comento

primero diseñe unas quillas SF-4 PC Stretch Quad Set escaladas a 4.5 de alto, no me gusto el comportamiento

las quillas que ves en los paipos de fibra están inspiradas en los modelos de windsurf, no de surf, ellos trabajan con modelos muy interesantes que he querido probar. antes de fabricar diseñe en 3d diferentes quillas para entender el funcionamiento las fuerzas y turbulencias que generan. de este estudio saqué la conclusión que los modelos se acercaban a lo que queria https://www.k4fins.com/product/zbd/ https://www.k4fins.com/product/rocket-fronts-trailers/

paipo azul, altura 4.5 base 4,
paipo granate altura 5.5 base 4.5
no se el ángulo sweep. el granate es más retrasado que el azul, estos diseños fueron los que más me gustaron al hacer el 3d pero no lo recuerdo. borre el archivo
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Re: paulownia + polyester+ fiberglass: rocker and flex

Unread postby GeoffreyLevens » Thu Dec 13, 2018 12:10 pm

As mentioned above, duck diving a mat is a bugger. BUT they have easily variable inflation. Paddle out very soft or empty (swim it out) if necessary, and get under white water no problem. Then a few puffs and ready to ride.
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