Dw blank wieght

[Vancouver_foiler]

Anyone have a range of what's acceptable blank wieght f a.shaped 8ft'ish DW board? I recently picked one up that was carved out by Marko. 8'1*22 @ 120L with a stringer coming in at 7.5pds. Feels heavy.

[Dwight (DW)]

1.35 lb EPS (ordered as 1.5) would be around 5.7 lbs for 120 liters. They used the wrong foam.

Production boards use 0.85 lb (ordered as 1.0). But, by the time you add all the sandwich and laminate required, weight comes back to where you’d be with simple 1.35 foam and glass.

I had this grand plan to use 1.35 mid span, and 0.85 nose and tail. I bought the EPS, then after a day of working with it, tossed it in the trash. It’s been 15 years since I last held 0.85 lb. Forgot what garbage foam it is. Went back to all 1.35 construction. My board weight beat Armstrongs published weight for same volume, so very happy.

[Vancouver_foiler]

Thanks Dwayne

quote author=Dwight (DW) link=topic=38556.msg440941#msg440941 date=1693478412]
1.35 lb EPS (ordered as 1.5) would be around 5.7 lbs for 120 liters. They used the wrong foam.

Production boards use 0.85 lb (ordered as 1.0). But, by the time you add all the sandwich and laminate required, weight comes back to where you’d be with simple 1.35 foam and glass.

I had this grand plan to use 1.35 mid span, and 0.85 nose and tail. I bought the EPS, then after a day of working with it, tossed it in the trash. It’s been 15 years since I last held 0.85 lb. Forgot what garbage foam it is. Went back to all 1.35 construction. My board weight beat Armstrongs published weight for same volume, so very happy.
[/quote]

[Vancouver_foiler]

Dwayne as a salvage operation, is there any value in wrapping the heavier foam blank in lighter glass/carbon? I was almost tempted to get my hot wire gun and cut out large sections of foam, to splice in some light density 1pd at the core.

[Dwight (DW)]

Just noticed your blank included a stringer. That is where all the extra weight came from.

With 1.5# and our boards being super thick, no need for a stringer. You’re also not barrel riding. Stringers are a mistake for our use.

So I’m going to say they did use 1.5 lb (1.35 actual). You still need a carbon deck patch. Stringer won’t stop heel and knee dents.

I’d just do light glassing and single carbon deck patch, just where you stand. Single 6 oz top and bottom and treat as fragile.

[Vancouver_foiler]

Thanks again dwayne.
I spec'ed it out stringerless with 1.5 pd and this showed up.
As the owner of Swell Composites did it as a favour, i told him id use them or find a home for them-not sure that's gonna happen now.

te author=Dwight (DW) link=topic=38556.msg440948#msg440948 date=1693513958]
Just noticed your blank included a stringer. That is where all the extra weight came from.

With 1.5# and our boards being super thick, no need for a stringer. You’re also not barrel riding. Stringers are a mistake for our use.

So I’m going to say they did use 1.5 lb (1.35 actual). You still need a carbon deck patch. Stringer won’t stop heel and knee dents.

I’d just do light glassing and single carbon deck patch, just where you stand. Single 6 oz top and bottom and treat as fragile.
[/quote]

[surfcowboy]

Y'all ever doubt that Dwight is a nice just look at this thread where he keeps answering questions aimed at some Dwayne guy. 😂

Regarding that stringer, traditional surfboard guys can't believe that epoxy could be so strong. We see that question all the time on the Facebook builder group. They put them in by default.