Re: [bolger] fillet piece on Topaz

On 1/24/06, Sam Glasscock wrote:
> Bruce, are you going to use foam inside the "nose"?

Almost certainly yes, but I have fax'ed a note to PB&F asking the
question just to be safe.
Bruce, I know PB&F strongly advocate foam in the nose.
Mr. Bolger recommended that scrap pieces of foam be
fitted to roughly the shape of the nose before the
1/4" fillet pieces are glassed in place, and then
small amounts of foam compound poured in (through
temporary access holes) to anneal the whole. He was
concerned about too much foam rupturing the seams. By
the time I had recieved this advice, howenver, I
already had my hull finished, with the nose empty. I
put in the copper tubing at the advice of Gougeon
Bros. I drilled a hole through the sole well forward,
epoxied the tubing in place, coiled it into a pigtail,
and led it up to just below the gunwale. I figured if
water ever got that high, I would have bigger problems
than a little water getting in the nose. When I holed
and flooded the nose, I never got any water up through
the tubing. Sam

--- Bruce Hallman <bruce@...> wrote:

> Perhaps I should ask Bolger.
>
> The upsweeping plate used by Bolger on Topaz,
> Tahiti, and Sitka
> Explorer is supposed to be a watertight barrier,
> with the bow fillet
> acting as a sacraficial 'crash cushion'.
>
> I would drill [then plug] a couple relief holes in
> the bottom to allow
> for the expansion of the wet foam.
>
> On 1/24/06, John Bell
> <smallboatdesigner@...> wrote:
> > Is putting expanding foam in there really a good
> idea? I worry about what
> > would happen if (when) it gets wet. My preference
> would be to have the
> > ability to ventilate the area to keep it fresh.
>


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Perhaps I should ask Bolger.

The upsweeping plate used by Bolger on Topaz, Tahiti, and Sitka
Explorer is supposed to be a watertight barrier, with the bow fillet
acting as a sacraficial 'crash cushion'.

I would drill [then plug] a couple relief holes in the bottom to allow
for the expansion of the wet foam.

On 1/24/06, John Bell <smallboatdesigner@...> wrote:
> Is putting expanding foam in there really a good idea? I worry about what
> would happen if (when) it gets wet. My preference would be to have the
> ability to ventilate the area to keep it fresh.
--- John Bell <smallboatdesigner@...>
wrote:

> Is putting expanding foam in there really a good
> idea? I worry about what
> would happen if (when) it gets wet. My preference
> would be to have the
> ability to ventilate the area to keep it fresh.
>

John, I ran a piece of copper tubing through the
sole, into the otherwise-sealed compartment, not to
ventilate it, but to at least allow pressure to
equalize. There was a MAIB article a couple of years
ago where a fellow took a Topaz from freezing weather
to Florida, put it in, and had seam failure of the
nose, presumably due to a pressure differential. Sam

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Oops--I see you have answered my question before I
asked it. I did puncture the nose once, putting her
in, and it did fill with water, but I din't even
notice it till I pulled her out. I wasn't happy, of
course, but it was great to know that the sacrificial
nose was a practicality and that hitting a log in the
dark would be a nuisance, not a disaster. Sam

--- Bruce Hallman <bruce@...> wrote:

> > Are you planing on filling those voids under the
> fillet pieces and
> > if yes,whatcha gonna use?
>
> I have been collecting empty plastic bottles, and
> will fill the void
> with those. Then after I flip, I will fill the
> remaining volume with
> expanding 2 pcf foam. I figure it needs to be full
> of foam below
> the waterline and small air gaps way up high won't
> cause
> trouble.
>
> Interestingly, the plans omit foam in these voids.
>
> Phil Bolger did add large amounts of foam in the
> center and
> after parts of the boat during his Sept'05 redesign,
> after I asked
> for the capability of the boat to remain 'fully
> afloat' after being
> filled with rain at a mooring.
>


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Is putting expanding foam in there really a good idea? I worry about what
would happen if (when) it gets wet. My preference would be to have the
ability to ventilate the area to keep it fresh.

I have to admit that I have an irrational fear of the expanding stuff
anyway. It's just too easy to add a little bit too much and BOOM! you've
blown up what ever you put it in. There used to be a hilarious story
circulating on the net about a guy who tried to put expanding foam in the
ends of his stripper canoe and wound up with huge mess and a ruined hull.
Anyone else remember that one?




----- Original Message -----
From: "Peter Lenihan" <peterlenihan@...>
To: <bolger@yahoogroups.com>
Sent: Tuesday, January 24, 2006 1:46 AM
Subject: [bolger] Re: fillet piece on Topaz
> I haven't filled my fillet voids yet but intend on using expanding
> foam once things warm up here again in early summer. I look forward
> to hearing what you choose to do and how it all goes.
>
Bruce, are you going to use foam inside the "nose"?
The original plans don't mention it, but I know Mr.
Bolger recomends it; and I know from experiance that
that empty space behind that thin ply makes a perfect
drum. Sam

--- Bruce Hallman <bruce@...> wrote:

>http://www.hallman.org/webcam/shop.jpg
>
> I just did a 'dry fit' of the twisted bow fillet
> pieces on Topaz, hecka fun.
>
> I hate sanding, but bending plywood? I can't get
> enough of that magic.
>


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> Are you planing on filling those voids under the fillet pieces and
> if yes,whatcha gonna use?

I have been collecting empty plastic bottles, and will fill the void
with those. Then after I flip, I will fill the remaining volume with
expanding 2 pcf foam. I figure it needs to be full of foam below
the waterline and small air gaps way up high won't cause
trouble.

Interestingly, the plans omit foam in these voids.

Phil Bolger did add large amounts of foam in the center and
after parts of the boat during his Sept'05 redesign, after I asked
for the capability of the boat to remain 'fully afloat' after being
filled with rain at a mooring.
--- Inbolger@yahoogroups.com, Bruce Hallman <bruce@h...> wrote:
>
>http://www.hallman.org/webcam/shop.jpg
>
> I just did a 'dry fit' of the twisted bow fillet pieces on Topaz,
hecka fun.
>
> I hate sanding, but bending plywood? I can't get enough of that
magic.

Bruce,you're like a house on fire! Go man go! You may hate sanding
now,but you'll learn to love it later :-) And yes,the way plywood
can sometimes be bent into some rather beguiling curves never fails
to entrance me too!
Are you planing on filling those voids under the fillet pieces and
if yes,whatcha gonna use? I think it was Sam who had a
misunderstanding with his trailer which resulted in a puncture on
one of his fillets and the subsequent grief of taking on unwanted
ballast.
I haven't filled my fillet voids yet but intend on using expanding
foam once things warm up here again in early summer. I look forward
to hearing what you choose to do and how it all goes.

Here a few pictures of my fillet pieces,which caused my heart to
race,if only irratically,but fequently,and taken some time ago,they
are near the bottom in the "2003" grouping(yikes!):
http://groups.yahoo.com/group/Bolger3/files/WINDERMERE/

Keep up the good work,be careful,work safe,and kiss your wife once
in a while will ya! :-D

Sincerely,

Peter Lenihan, feeling like molasses in January,a Canadian January
(!),when I see the Speed King himself Bruce Hallman blazing across
the monitor putting us all to shame :-)
Hey Bruce, ...she's looking good!

Bruce Hallman <bruce@...> wrote:http://www.hallman.org/webcam/shop.jpg

I just did a 'dry fit' of the twisted bow fillet pieces on Topaz, hecka fun.

I hate sanding, but bending plywood? I can't get enough of that magic.


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[Non-text portions of this message have been removed]
http://www.hallman.org/webcam/shop.jpg

I just did a 'dry fit' of the twisted bow fillet pieces on Topaz, hecka fun.

I hate sanding, but bending plywood? I can't get enough of that magic.