Search found 321 matches

by CHRISPI
Sun Nov 22, 2020 8:42 am
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

Fluid mechanics love it I spend a lot time watching wakes, vortexes on clips like this but this one has stumped me .
by CHRISPI
Sat Oct 31, 2020 9:27 am
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

Flat laminates have very good twisting flex but bad bending flex or rocker flex ,I run 5mm x about 50 mm foam strip along the bottom centreline .Blended into the bottom surface making a lengthwise domed rib and the stiffness is control by how many layers off clothe laminated , good twist flex around...
by CHRISPI
Fri Oct 30, 2020 1:39 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

Try thin foam core ,I am using two 5 mm sheets off airex laminated with 6 oz cloth covered with polyethylene foam to whatever thickness you need ,gets good flex .I think a thin plywood core would work well
by CHRISPI
Tue Oct 20, 2020 4:35 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

It can be agonising building new boards being around it for weeks sometimes, knowing all the small imperfection and mistakes in it. I battle with symmetry getting the left and right side profiles exactly the same
by CHRISPI
Mon Oct 19, 2020 12:34 pm
Forum: Paipo Board Design & Building
Topic: Handsfree selfie stick
Replies: 10
Views: 219

Re: Handsfree selfie stick

That wave is way above my pay grade
by CHRISPI
Sun Oct 18, 2020 3:49 pm
Forum: Paipo Board Design & Building
Topic: Handsfree selfie stick
Replies: 10
Views: 219

Re: Handsfree selfie stick

sheeeeIIIItttttt ? you know what I mean
by CHRISPI
Sun Oct 18, 2020 3:46 pm
Forum: Paipo Board Design & Building
Topic: Handsfree selfie stick
Replies: 10
Views: 219

Re: Handsfree selfie stick

Fully converted to cold water not as bad as I thought, got my first duck dive ice-cream headache. bought a Psycho one 4/5 it was difficult to get a back zip suit .surfing Cayton bay mostly bit SheeeeIIIIItttttt in summer long weeks without surf but lately have had some good surf, we had planned a tr...
by CHRISPI
Sun Oct 18, 2020 3:22 pm
Forum: Paipo Board Design & Building
Topic: Handsfree selfie stick
Replies: 10
Views: 219

Re: Handsfree selfie stick

Thanks good price
by CHRISPI
Sun Oct 18, 2020 9:01 am
Forum: Paipo Board Design & Building
Topic: Handsfree selfie stick
Replies: 10
Views: 219

Handsfree selfie stick

Made a hands free selfie stick, to try get shots off the fins working, it’s a old hero 2 hope I can make it work definitely vintage
by CHRISPI
Fri Oct 09, 2020 2:27 pm
Forum: Paipo Board Design & Building
Topic: Xylem Paipos are back
Replies: 8
Views: 318

Re: Xylem Paipos are back

Low centre of gravity short and wide, wise words
by CHRISPI
Tue Oct 06, 2020 3:48 pm
Forum: Paipo Board Design & Building
Topic: New board
Replies: 4
Views: 233

Re: New board

That’s the bottom, deck is not finished
by CHRISPI
Tue Oct 06, 2020 3:44 pm
Forum: Paipo Board Design & Building
Topic: New board
Replies: 4
Views: 233

New board

What a fantastic fulfilling hobby creating your own surfboards and the anticipation for the first test ride gives me goose bumps. Nobody seems to get this wing thing but when they light up down a wave face it is thrilling .This board is the longest most buoyant I have made. North Sea pleas bring wav...
by CHRISPI
Sun Aug 09, 2020 3:30 am
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

I used to use contact glue but it is difficult to lay up large pieces, after some testing I now stick the pe with laminating epoxy it has the same adhesion as contact glue but gives time to move the pe around before it sets, with contact glue if you make a mistake its bad news. For the core lay the ...
by CHRISPI
Fri Aug 07, 2020 12:43 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

Layered and veneered structures get stronger with concaves , it’s so easy to press form layered shapes .there are so many types of skin layering to try out .With polyethylene , cork ,etc it’s easy to change a shape or add to after testing
by CHRISPI
Wed Aug 05, 2020 3:18 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

You can change twist and bend flex by adding layers of cloth down the core spine. I feel flex in a board is desirable
by CHRISPI
Wed Aug 05, 2020 3:06 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

The wings are part of the core with added layers of cloth after shaping. Very easy to press form rocker and fin angle I put in about 2 degrees in my fin pitch. My supplier is East coast fibreglass supplies I mostly use Airex PVC C70, also 3D core material but is very resin rich and a bit heavy but e...
by CHRISPI
Tue Aug 04, 2020 3:33 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

bb5.jpg
My boards are the same as a wood Paipo but with soft buoyancy draped on shaped in a teardrop form. I could use plywood but it is too heavy and lacks the bouncy and strength of Airx foam. The photos I sent deform the true shape of the board.
by CHRISPI
Mon Aug 03, 2020 3:36 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

Nature uses pectoral fins in all her best in water muscle powered designs, a delta shape for sustained lift at high angles of attack, sharp tips for roll and drag reduction
by CHRISPI
Mon Aug 03, 2020 3:14 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

I have survived the tropical Indian ocean to North Sea transition .I am now a Cayton bay local ,my first experiences was in 9c water without a hood and got my first duck dive ice-cream headache , but the stoke is back .Getting out off a winter wetsuit after a 3 hour surf is somewhat difficult. We ar...
by CHRISPI
Sun Aug 02, 2020 2:19 pm
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 87
Views: 2495

Re: Quad Concave Body Board Study

Thanks for a very interesting post here is an extreme version of wing rails, but think of them as pectoral fins this board paddles amazingly well. You can feel lift at very low speed it will outpace most long boards on the smallest waves. On steep faces with one tip in the face it is mind blowing fa...