Search found 309 matches

by CHRISPI
Sun Aug 09, 2020 3:30 am
Forum: Paipo Board Design & Building
Topic: Quad Concave Body Board Study
Replies: 30
Views: 888

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: 30
Views: 888

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: 30
Views: 888

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: 30
Views: 888

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: 30
Views: 888

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: 30
Views: 888

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: 30
Views: 888

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: 30
Views: 888

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...
by CHRISPI
Mon Nov 18, 2019 2:56 pm
Forum: Paipo Board Design & Building
Topic: Soft edge
Replies: 6
Views: 2339

Re: Soft edge

The trouble with performance experiments and trying different approaches is it creates more questions than answers, and the old question is how you measure it. I feel wave gardens might be the answer, it something you can budget for and get guaranteed constant size waves so you can set a base line f...
by CHRISPI
Mon Nov 18, 2019 10:46 am
Forum: Paipo Board Design & Building
Topic: Soft edge
Replies: 6
Views: 2339

Soft edge

IMG_20191105_125753.jpg I have been experimenting with vinyl wrap on my latest boards , and found with layering clear vinyl makes a perfect trailing edge profile finishing with a razor thin soft edge ,stiffness can be added or subtracted with more or less layers .I have read a lot about vortex gene...
by CHRISPI
Mon Oct 28, 2019 5:55 am
Forum: Paipo Board Design & Building
Topic: MK3
Replies: 7
Views: 3994

Re: MK3

Wow very nice .How you going to protect that car from the night time dew point
by CHRISPI
Mon Oct 28, 2019 5:36 am
Forum: Paipo Board Design & Building
Topic: TBG5
Replies: 99
Views: 29725

Re: TBG5

Arm leashes specially elbow make boards with pointy bits come back to fast and hard.
by CHRISPI
Fri Oct 25, 2019 7:18 am
Forum: Paipo Board Design & Building
Topic: MK3
Replies: 7
Views: 3994

Re: MK3

Learning how to glue and laminate in this cold wet UK weather is an eye opener ,I had huge double garage work shop in South Africa I thought could not live without it but heating it hear would not make sense sheds work fine but you can’t collect junk, a tinkerer is only as good as his pile of junk
by CHRISPI
Fri Oct 25, 2019 6:56 am
Forum: Paipo Board Design & Building
Topic: MK3
Replies: 7
Views: 3994

Re: MK3

Before I bin my lamination off cuts I always twist and break them to understand how they perform.
by CHRISPI
Thu Oct 24, 2019 3:45 pm
Forum: Paipo Board Design & Building
Topic: MK3
Replies: 7
Views: 3994

Re: MK3

The only thing to stay the same on all my boards are my unique stainless steel leash plugs
by CHRISPI
Thu Oct 24, 2019 3:26 pm
Forum: Paipo Board Design & Building
Topic: MK3
Replies: 7
Views: 3994

Re: MK3

Yes stick, glue, weld stuff together and then rip it apart, there is amazing new adhesives and materials out there,example cars are glued together .
by CHRISPI
Mon Oct 21, 2019 9:12 am
Forum: Paipo Board Design & Building
Topic: MK3
Replies: 7
Views: 3994

MK3

I still feel foils will give better lift to drag numbers than parallel to water flow rails .This is also an experiment with vinyl wrap, I don’t know how long it will stay on. Its 10mm Airex foam core with 20 mm top and bottom polyethylene foam plenty volume, the vinyl wrap is epoxy to the polyethyle...
by CHRISPI
Mon Oct 21, 2019 8:38 am
Forum: Paipo Board Design & Building
Topic: TBG5
Replies: 99
Views: 29725

Re: TBG5

Very nice boards. Keel V bottom is the way to go.
by CHRISPI
Thu Oct 10, 2019 1:49 pm
Forum: Paipo Board Design & Building
Topic: Hot Curl Prone Board
Replies: 15
Views: 4401

Re: Hot Curl Prone Board

Thank the lord a post .This board ticks all the boxes on my list, are you going that deep on the v very rad
by CHRISPI
Mon Sep 02, 2019 1:10 pm
Forum: Paipo Board Design & Building
Topic: Immigrant board Mk2
Replies: 5
Views: 3485

Re: Immigrant board Mk2

I have been thinking about a box fitting to run stand-up board fins horizontally on the rails .lots of interesting profiles to test. Not certain they can handle full horizontal side load.