Re: The Dumb-OX
Can you laminiate a piece across the fracture from the inside, this
wouldn't affect exterior hull fairness and would add strength at a
point that is "asking" for a little beefing up. A piece of 1/4" or
two layers of 1/8" well buttered with thickened epoxy would go a long
way to improving my piece of mind at the point of tearing.
Bruce Hector, always thinking of new ways to improve the Gougeon
brothers financial health.
wouldn't affect exterior hull fairness and would add strength at a
point that is "asking" for a little beefing up. A piece of 1/4" or
two layers of 1/8" well buttered with thickened epoxy would go a long
way to improving my piece of mind at the point of tearing.
Bruce Hector, always thinking of new ways to improve the Gougeon
brothers financial health.
--- In bolger@y..., "rnlocnil" <lincolnr@m...> wrote:
be my biggest concern. If it appears fair, Then I would also be
concerned about the stiffness of the xynole. Use it by all means,
but get some wood or glass in there too. Everything can be fixed.
> Seems to me it would be wise to use real glass in the vicinity ofthe
> fracture. I'm sure Xynole is tough, but what are it's structuralon
> properties? If it was me I'd make a strong effort to make sure that
> the busted veneer is glued down well everywhere or else whatever is
> top of it will be vulnerable. I might even try peeling it away abit
> to check on extent of delam and whether there is a void or crackunder
> it that needs filling. You may end up with a flat spot or lumpthere,
> unfortunately.Are you building on frames? or more instant style . Fairness would
be my biggest concern. If it appears fair, Then I would also be
concerned about the stiffness of the xynole. Use it by all means,
but get some wood or glass in there too. Everything can be fixed.
I think it just means you have another seam to tape.
Roger S
Roger S
> The Dumb-Ox is the name I've bestowed upon the Dobler 16 semi-dory I01930, Fax: (978) 282-1349
> am building. The crack in the ply veneer is just forward of the
> forward most frame where it begins to bend into the bow. One can
> barely see the stress fracture, but it is there where it will be
> covered by the glass tape over the chines and a layer of xynole when
> I "glass" the bottom. The ply is 1/4 Brunzeel occume and the stage of
> construction -- she's all planked up and ready for the seams to be
> taped.
>
> Dennis
>
> --- In bolger@y..., "rnlocnil" <lincolnr@m...> wrote:
> > A quick search revealed no previous info on Dumb-Ox, but maybe
> search
> > is bad and maybe I forgot.
> >
> > Can you give us more specifics? Type of boat? Type of plywood?
> > Stage of project? What you mean by "point of stress"? Is that where
> > the ply goes over a frame? I would be tempted to get some glue
> under
> > those veneers, press down somehow (use weep holes maybe to let glue
> > get into ends of delamination), then glass over, but I don't know
> > enough. Not to mention that I'm not tremendously experienced, tho
> I've
> > dealt with delaminated ply a little. BY the time I did, I think all
> > the glue was shot, so I gave up eventually. Maybe you should boil
> some
> > ply samples or do long term soak to be sure you want to keep going
> > with this wood. If necessary to remove, if not too many pieces
> maybe
> > removing the screws and then using a sharp chisel could do the job.
> > But on this part I'm guessing.
> > --- In bolger@y..., "pseudodion42" <pseudodion3@a...> wrote:
> > > Hello, All. I was stitching the bow on The Dumb-Ox today when I
> > heard
> > > a loud pop-crack near the bow chine. Further inspection revealed
> > that
> > > the plywood veneer cracked at the point of stress. I am heartsick
> > and
> > > a little worried. Is this a fatal failure? The panels are glued
> and
> > > screwed to the frames, so there is not much hope of removing it
> and
> > > replacing the panel. What can be done to insure that it does not
> > > spread?
> > >
> > > Thanks,
> > >
> > > Dennis
>
>
>
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Seems to me it would be wise to use real glass in the vicinity of the
fracture. I'm sure Xynole is tough, but what are it's structural
properties? If it was me I'd make a strong effort to make sure that
the busted veneer is glued down well everywhere or else whatever is on
top of it will be vulnerable. I might even try peeling it away a bit
to check on extent of delam and whether there is a void or crack under
it that needs filling. You may end up with a flat spot or lump there,
unfortunately. I suppose if that really bothered you you could glue on
a thin layer and sand down to smooth. Yuck!
BTW, I could see the Dobler being a really nice boat to have, if I
could accept a trailer.
fracture. I'm sure Xynole is tough, but what are it's structural
properties? If it was me I'd make a strong effort to make sure that
the busted veneer is glued down well everywhere or else whatever is on
top of it will be vulnerable. I might even try peeling it away a bit
to check on extent of delam and whether there is a void or crack under
it that needs filling. You may end up with a flat spot or lump there,
unfortunately. I suppose if that really bothered you you could glue on
a thin layer and sand down to smooth. Yuck!
BTW, I could see the Dobler being a really nice boat to have, if I
could accept a trailer.
--- In bolger@y..., "pseudodion42" <pseudodion3@a...> wrote:
> The Dumb-Ox is the name I've bestowed upon the Dobler 16 semi-dory I
> am building. The crack in the ply veneer is just forward of the
> forward most frame where it begins to bend into the bow. One can
> barely see the stress fracture, but it is there where it will be
> covered by the glass tape over the chines and a layer of xynole when
> I "glass" the bottom. The ply is 1/4 Brunzeel occume and the stage
of
> construction -- she's all planked up and ready for the seams to be
> taped.
>
> Dennis
>
snip
Dennis, No matter what it takes, fix it until your satisfied that
you'll never have another thought about its safety then you'll be
done. The mind is a terrible thing to stress
you'll never have another thought about its safety then you'll be
done. The mind is a terrible thing to stress
--- In bolger@y..., "pseudodion42" <pseudodion3@a...> wrote:
> The Dumb-Ox is the name I've bestowed upon the Dobler 16 semi-dory
I
> am building. The crack in the ply veneer is just forward of the
> forward most frame where it begins to bend into the bow. One can
> barely see the stress fracture, but it is there where it will be
> covered by the glass tape over the chines and a layer of xynole
when
> I "glass" the bottom. The ply is 1/4 Brunzeel occume and the stage
of
> construction -- she's all planked up and ready for the seams to be
> taped.
>
> Dennis
The Dumb-Ox is the name I've bestowed upon the Dobler 16 semi-dory I
am building. The crack in the ply veneer is just forward of the
forward most frame where it begins to bend into the bow. One can
barely see the stress fracture, but it is there where it will be
covered by the glass tape over the chines and a layer of xynole when
I "glass" the bottom. The ply is 1/4 Brunzeel occume and the stage of
construction -- she's all planked up and ready for the seams to be
taped.
Dennis
am building. The crack in the ply veneer is just forward of the
forward most frame where it begins to bend into the bow. One can
barely see the stress fracture, but it is there where it will be
covered by the glass tape over the chines and a layer of xynole when
I "glass" the bottom. The ply is 1/4 Brunzeel occume and the stage of
construction -- she's all planked up and ready for the seams to be
taped.
Dennis
--- In bolger@y..., "rnlocnil" <lincolnr@m...> wrote:
> A quick search revealed no previous info on Dumb-Ox, but maybe
search
> is bad and maybe I forgot.
>
> Can you give us more specifics? Type of boat? Type of plywood?
> Stage of project? What you mean by "point of stress"? Is that where
> the ply goes over a frame? I would be tempted to get some glue
under
> those veneers, press down somehow (use weep holes maybe to let glue
> get into ends of delamination), then glass over, but I don't know
> enough. Not to mention that I'm not tremendously experienced, tho
I've
> dealt with delaminated ply a little. BY the time I did, I think all
> the glue was shot, so I gave up eventually. Maybe you should boil
some
> ply samples or do long term soak to be sure you want to keep going
> with this wood. If necessary to remove, if not too many pieces
maybe
> removing the screws and then using a sharp chisel could do the job.
> But on this part I'm guessing.
> --- In bolger@y..., "pseudodion42" <pseudodion3@a...> wrote:
> > Hello, All. I was stitching the bow on The Dumb-Ox today when I
> heard
> > a loud pop-crack near the bow chine. Further inspection revealed
> that
> > the plywood veneer cracked at the point of stress. I am heartsick
> and
> > a little worried. Is this a fatal failure? The panels are glued
and
> > screwed to the frames, so there is not much hope of removing it
and
> > replacing the panel. What can be done to insure that it does not
> > spread?
> >
> > Thanks,
> >
> > Dennis
A quick search revealed no previous info on Dumb-Ox, but maybe search
is bad and maybe I forgot.
Can you give us more specifics? Type of boat? Type of plywood?
Stage of project? What you mean by "point of stress"? Is that where
the ply goes over a frame? I would be tempted to get some glue under
those veneers, press down somehow (use weep holes maybe to let glue
get into ends of delamination), then glass over, but I don't know
enough. Not to mention that I'm not tremendously experienced, tho I've
dealt with delaminated ply a little. BY the time I did, I think all
the glue was shot, so I gave up eventually. Maybe you should boil some
ply samples or do long term soak to be sure you want to keep going
with this wood. If necessary to remove, if not too many pieces maybe
removing the screws and then using a sharp chisel could do the job.
But on this part I'm guessing.
is bad and maybe I forgot.
Can you give us more specifics? Type of boat? Type of plywood?
Stage of project? What you mean by "point of stress"? Is that where
the ply goes over a frame? I would be tempted to get some glue under
those veneers, press down somehow (use weep holes maybe to let glue
get into ends of delamination), then glass over, but I don't know
enough. Not to mention that I'm not tremendously experienced, tho I've
dealt with delaminated ply a little. BY the time I did, I think all
the glue was shot, so I gave up eventually. Maybe you should boil some
ply samples or do long term soak to be sure you want to keep going
with this wood. If necessary to remove, if not too many pieces maybe
removing the screws and then using a sharp chisel could do the job.
But on this part I'm guessing.
--- In bolger@y..., "pseudodion42" <pseudodion3@a...> wrote:
> Hello, All. I was stitching the bow on The Dumb-Ox today when I
heard
> a loud pop-crack near the bow chine. Further inspection revealed
that
> the plywood veneer cracked at the point of stress. I am heartsick
and
> a little worried. Is this a fatal failure? The panels are glued and
> screwed to the frames, so there is not much hope of removing it and
> replacing the panel. What can be done to insure that it does not
> spread?
>
> Thanks,
>
> Dennis
Hello, All. I was stitching the bow on The Dumb-Ox today when I heard
a loud pop-crack near the bow chine. Further inspection revealed that
the plywood veneer cracked at the point of stress. I am heartsick and
a little worried. Is this a fatal failure? The panels are glued and
screwed to the frames, so there is not much hope of removing it and
replacing the panel. What can be done to insure that it does not
spread?
Thanks,
Dennis
a loud pop-crack near the bow chine. Further inspection revealed that
the plywood veneer cracked at the point of stress. I am heartsick and
a little worried. Is this a fatal failure? The panels are glued and
screwed to the frames, so there is not much hope of removing it and
replacing the panel. What can be done to insure that it does not
spread?
Thanks,
Dennis