Stringerless Polyurethane Glassing Schedule

General Discussion
1

Spent a couple hours searching in the archives. Lots of info on EPS, but pretty much nil on Stringerless poly. Have a Stringerless Ice-9 mowses 6-3 fish blank. When I bought the blank, was considering uni carbon fiber rails. Not so sure I want to go that route anymore, but still might give it a shot. So getting back to my original question, I’m going to be shaping either a 5’7 x 21" x 2 3/8 Keel Fish or a 5’5 x 21.5" x 2.5" mini-simmons inspired shape. If possible, I would like it to come out the same weight as a stringered fish that was glassed 6x4 deck and 4 oz bottom. Was wondering if anyone had any similar experience that they could share. If I go with the fish, it will probably be very similar to this (except glassed by me and not Moonlight).

2

A layer of six and four ounce both sides stagger lapped is what I have been told.

3

I have recently done two stringerless, one 6’6" Big Fish and a Simmons-inspired 6’6".

The Simmons-like board has a spooned nosed so I inserted a simple Balsa stringer for the first 36 inches. I havent glassed it yet but…

The 6’6" Fish is thicker than what you described but I did it double 6 deck and single 6 bottom, wrapped the rails twice, staggered.

I have surfed it up to SH and it is strong enough as is.

Here is the spoon nose…

Here is the deck of the fish…

Jamie Murray did a 5’7" I think, mini-Simmons inspired stringerless in poly too…

4

My stringerless EPS has 16oz. on the deck (6/6/4) and 12oz. on the bottom (6/6 I think). It’s 1.5# EPS though, but is rock solid so that may be a good reference point.

I believe Moonlight has done some stringerless Poly boards, might want to see if they’d share the secret recipe with you.

5

Manuel Caro does 6/6 decks, 4/4 bottoms for his stringerless polys. Not sure who’s foam he uses.

I just did a 5’6 stubby with 6/4 x 6 and just wrapped the rails a half inch more than i would normally. Haven’t ridden it yet though. I used walker foam.

6

Thanks for all of your input. Now, I have something to work with.

7

http://www.surfysurfy.net/2009/01/stingerless-twinzer-by-shawn-ambrose.html

See if you can bribe Moonkitty with some catnip to give up the glassing recipe.

8

I’ve glassed that blank (stringerless ice 9 mowses 6’4" fish) twice, and two or three other stringerless Ice 9s, but I’ve never tried to replicate the weight of another board.

Chris at Ice 9 could tell you pretty much exactly how much weight difference there is between the stringered and stringerless versions – my wild-a$$ guess is about 5 ounces for a 1/4" bass stringer, and then you could just replicate the same glass schedule, and add a stomp patch (or other, smaller reinforcement, maybe a fin patch?) of [whatever size] that weighed as much as the stringer.

9

From surfy surfy:

"We glassed this board with double 4 oz S cloth on both sides and it

feels solid but yes, stringerless boards can morph and get twisty

(which is kind of the point when you are riding them) I don’t think

breakage will be an issue since he will be riding this board in 3 ft

mush."

10

In a board that small, etmo’s w.a.g. of 5 oz isn’t far off. Probably more like 7 or 8 oz

for the stringer and glue. With no stringer, the thickness is your stiffener, so the diff

between 2 3/8’’ and 2 1/2’’ will be noticable in terms of board ‘‘feel’’. But a 5’7’’ or 5’5’’

isn’t going to have sufficient moment arm to break, at that thickness, in average waves.