Search found 46 matches

by B_Wurts
Thu Nov 30, 2023 11:00 am
Forum: Paipo Board Design & Building
Topic: Monolith 2001: XLPE
Replies: 47
Views: 522412

Re: Monolith 2001: XLPE

From Chad Stickney’s helmet cam while riding my 42-inch, channel-tail prototype at Waco Surf.

https://vimeo.com/889928158?share=copy
by B_Wurts
Sun Oct 22, 2023 8:50 am
Forum: Paipo Board Design & Building
Topic: Monolith 2001: XLPE
Replies: 47
Views: 522412

Re: Monolith 2001: XLPE

This is a CAD figure for the 48” Channel-Tail model. Channel size is the same in the 42” model ridden in the video previously linked and the photo above — board planshape is similar. The bottom surface inside the tail channel provides indirect rocker. The tail channel functions as a low-drag, finles...
by B_Wurts
Thu Oct 19, 2023 3:39 pm
Forum: Paipo Board Design & Building
Topic: Monolith 2001: XLPE
Replies: 47
Views: 522412

Re: Monolith 2001: XLPE

Second Wave (Click link at bottom. Click first play arrow once, then the white play arrow on the black screen next.) Chad Stickney is riding my 42” Channel-Tail prototype, moving down the line under the fluid awning. @wacosurf_tx, with @ebodyboarding, #texastubetour Video filmed by Vicki Reale https...
by B_Wurts
Wed Oct 18, 2023 6:05 pm
Forum: Paipo Board Design & Building
Topic: Monolith 2001: XLPE
Replies: 47
Views: 522412

Re: Monolith 2001: XLPE

Chad Stickney riding my 42” channel-tail prototype @wacosurf_tx with @ebodyboarding, #texastubetour
Photo taken by Tony Prince at FB link below.
https://www.facebook.com/profile.php?id=1729590105
(Video yet to come if I can figure out how to post it.)
by B_Wurts
Sun Sep 03, 2023 10:56 am
Forum: Paipo Board Design & Building
Topic: Lindsay Lord Hybrid
Replies: 16
Views: 110840

Re: Lindsay Lord Hybrid

Sorry for the late reply. You two our obviously are a ot more scientific than myself. So as a rule of thumb you tend to stick around this AR. I don't want to digress away from the topic but what is Greenoughs AR? As a retired scientist, my perspective is influenced by science. While I was building ...
by B_Wurts
Wed Aug 30, 2023 6:42 pm
Forum: Paipo Board Design & Building
Topic: Lindsay Lord Hybrid
Replies: 16
Views: 110840

Re: Lindsay Lord Hybrid

Lord was commissioned by the Navy to research large boat/small ship designs for interdicting smuggling aka in the "cigarette boat" to PT or PC (patrol coastal) size category. The Coast Guard and Navy needed boats/ships that could patrol large areas of the Caribbean (and similar littoral w...
by B_Wurts
Wed Aug 30, 2023 4:31 pm
Forum: Paipo Board Design & Building
Topic: Lindsay Lord Hybrid
Replies: 16
Views: 110840

Re: Lindsay Lord Hybrid

matt23, I have not been ignoring you. Just finished a marathon write-up (Fri-Tues) of a non-surf design I had to submit by Tues. afternoon. I encourage you to read Lord's Chapter 2 about Aspect Ratio (pp. 11-19). When a watercraft is planing, only the bottom surface is in contact with the water (Fig...
by B_Wurts
Tue Aug 15, 2023 1:29 pm
Forum: Paipo Board Design & Building
Topic: Lindsay Lord Hybrid
Replies: 16
Views: 110840

Re: Lindsay Lord Hybrid

For those not familiar with Lindsay Lord, he was a professor of Naval Architecture prior to WWI. He did his graduate studies at MIT. He held a supervisory role with the US Navy. He researched planing hulls. Lord’s information about planing hull Aspect Ratios is found on pages 11-19. https://etchells...
by B_Wurts
Mon Jul 31, 2023 5:16 pm
Forum: Paipo Board Design & Building
Topic: Lindsay Lord Hybrid
Replies: 16
Views: 110840

Re: Lindsay Lord Hybrid

Bottom Chamfer Blank
by B_Wurts
Thu Jul 27, 2023 1:40 pm
Forum: Paipo Board Design & Building
Topic: Lindsay Lord Hybrid
Replies: 16
Views: 110840

Re: Lindsay Lord Hybrid

The chamfered hull is simple to make. Start with a rectangular blank with the desired dimensions. Shape the long edges on the bottom of the rectangular blank first to create the angled chamfers. Flip the chamfered side down and draw the desired planshape outline on the top (deck) side. Cut the plans...
by B_Wurts
Mon Jul 24, 2023 1:59 pm
Forum: Paipo Board Design & Building
Topic: Lindsay Lord Hybrid
Replies: 16
Views: 110840

Lindsay Lord Hybrid

My most recent builds/experiments create a rectangular planing surface for the bottom (parallel edges). Bottom chamfers allow me to use traditional curved rail outline templates.
The rectangular shape uses an Aspect Ratio in the Lindsay Lord 0.4 range.
I call them Lindsay Lord Hybrids.
by B_Wurts
Wed Jun 28, 2023 11:27 am
Forum: Paipo Board Design & Building
Topic: new pad?
Replies: 10
Views: 65439

Re: new pad?

I think the hydro turf you are talking about is super thin? The Hydro Turf brushed/flat EVA surf mat sheet is between 3/16” to 1/4” thick. Decided to try it to add some traction as well as cushioning — it looked more comfortable than their textured surfaces (diamond, etc). For a future build, I pla...
by B_Wurts
Sat Jun 24, 2023 11:44 am
Forum: Paipo Board Design & Building
Topic: new pad?
Replies: 10
Views: 65439

Re: new pad?

Thanks. This answer I gave to a question on the new Sways might be useful here: I used the HydroTurf “flat (brushed)” surf sheet that comes with self-adhesive backing (link below). https://hydroturf.com/products/sup-surf-traction-mat-sheet The self-adhesive is/was for fiberglass surfaces. You have t...
by B_Wurts
Tue Jun 20, 2023 8:26 am
Forum: Paipo Board Design & Building
Topic: Monolith 2001: XLPE
Replies: 47
Views: 522412

Re: Monolith 2001: XLPE

Important tip for XLPE boards. Don't lean them up against something in direct sun. The side that heats up warps toward the cool/shaded side. Found that if I leaned the opposite (cooler/shaded) side out in the sun for 20-30 min in the same sun heat, it warped back. Then I placed the board on a cool f...
by B_Wurts
Tue Jun 20, 2023 8:16 am
Forum: Paipo Board Design & Building
Topic: new pad?
Replies: 10
Views: 65439

Re: new pad?

Two weeks ago, I added this blue, brushed/flat HydroTurf EVA deck pad to one of my first foam and glass channel-bottom BB prototypes. Far from perfect, but fairly decent for a first-time deck pad application. Should do the job. Will see how well it holds up. I smoothed the deck-pad edges with a micr...
by B_Wurts
Sun May 21, 2023 11:59 am
Forum: Paipo Board Design & Building
Topic: new pad?
Replies: 10
Views: 65439

Re: new pad?

I'm reshaping an old board and I'm gonna need a new pad. Does anybody have a recommendation? I'd like a piece about 24"x36" and I'd contact glue it. I can locate some but it's got that raised diamond pattern and I think it's more for standups- not bellies. Where are you located? Hydro tur...
by B_Wurts
Sat Mar 25, 2023 7:28 pm
Forum: Paipo Board Design & Building
Topic: Strip plank build
Replies: 3
Views: 47866

Re: Strip plank build

In the skateboard world they use a 2-pc press for bgreen’s suggested method. With high enough density XPS, you can use 2 halves of foam with shaped desired rocker and place the glued up (title-bond III) ply into a vac-bag between the foam press pieces. On the silverfishlongboarding skate build forum...
by B_Wurts
Fri Jan 13, 2023 2:32 am
Forum: Paipo Board Design & Building
Topic: Monolith 2001: XLPE
Replies: 47
Views: 522412

Re: Monolith 2001: XLPE

Thanks Bill. It only needs to last a few days. I wasn't thinking of sandwich as all this needs to fit into a suitcase. Where do you buy your XLPE? My searches seem to only identify cable suppliers. I get my XLPE in the US from the Foam Factory in Macomb, Michigan. For short-term, XPS housing insula...
by B_Wurts
Thu Jan 12, 2023 12:48 pm
Forum: Paipo Board Design & Building
Topic: Monolith 2001: XLPE
Replies: 47
Views: 522412

Re: Monolith 2001: XLPE

do you know if you could ride a board of Divinycell and wood, without fibreglassing it? Divinycell is closed-cell and is reported to be water resistant. Couldn’t find % water absorption data on a quick search. Looks to come in 4-5 pcf densities with decent compressive strength. Would you sandwich t...
by B_Wurts
Sun Jul 10, 2022 3:40 pm
Forum: Paipo Board Design & Building
Topic: Monolith 2001: XLPE
Replies: 47
Views: 522412

Re: Monolith 2001: XLPE

I may have found an event where I can test my boards in consistent wave conditions -- Waco, TX; 10/3-10/4, 2022.
(Need to quickly build a channel-bottom TR-42 and a NACA-rail, wing-tail 47.5" to bring along also.)