Re: [bolger] Hollow mast plug
FWIW the Windsprint plans show a square, hollow, tapered
mast, 15' 6" x 3" to carry a 113 sq. ft. balanced lug.
There's a solid plug at the bottom 2' 6". The bury is only
16". This might be a clue to the right proportions.
Mark
Richard Spelling wrote:
mast, 15' 6" x 3" to carry a 113 sq. ft. balanced lug.
There's a solid plug at the bottom 2' 6". The bury is only
16". This might be a clue to the right proportions.
Mark
Richard Spelling wrote:
> snipsnip
> put some kind of plug in it just above the partner...
> It doesn't appear to have any crushing problems so far, and if it doessnap,
> I'm a daysailer, I'll troll home and make a solid mast.Just got back from measuring my mast. The walls are 1" thick, not 7/8" as
>
stated earlier.
Doug fir, 3-1/2" wide, 20ft long, 40lb.
Just closely examined the bearing surface at the partner. No signs of
crushing at all, except where I didn't quite get it shaved perfectly smooth,
then the small hills of wood are slightly, say 1/16", crushed. This is raw
wood, epoxy coated, no glass.
Partner is 1-1/2" thick, "D" shaped, with the curved side of the "D" wood
and a metal plate across the strait side.
As a side note, the grain on the individual staves go pretty much every
which way but loose. I think two of them are in the "tree" position, the
rest going willy nilly.
Can you describe a "diamond shaped metal plate"? Where would it be going?
I agree with you that it would probably break at the end of the plug, this
is why I've pretty much reconsidered doing anything to it.
It doesn't appear to have any crushing problems so far, and if it does snap,
I'm a daysailer, I'll troll home and make a solid mast.
I agree with you that it would probably break at the end of the plug, this
is why I've pretty much reconsidered doing anything to it.
It doesn't appear to have any crushing problems so far, and if it does snap,
I'm a daysailer, I'll troll home and make a solid mast.
----- Original Message -----
From: "Gordon Couger" <gcouger@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 7:18 AM
Subject: Re: [bolger] Hollow mast plug
> If you want to prevent crushing a diamond shaped metal plate will do a lot
> better than plug. The outer part of the mast will still crush. If you have
> crushing problems you should spread them over the mast.
>
> Take an broken fishing pole and epoxy a plug in it and bend it until it
> breaks. I bet you ten bucks it breaks at the end of the plug.
>
> Gordon
> Gordon Cougergcouger@...
> Stillwater, OK www.couger.com/gcouger
> 405 624-2855 GMT -6:00
> ----- Original Message -----
> From: "Richard Spelling" <richard@...>
> To: <bolger@egroups.com>
> Sent: Monday, July 31, 2000 6:53 PM
> Subject: Re: [bolger] Hollow mast plug
>
>
> > Gordon, David.
> >
> > I believe the failure mode is tube crushing, this is what the plug would
> > prevent. Don't think an external layer of epoxy/fiber of any reasonalble
> > thickness would help in this.
> >
> > The tube is plenty strong, was only going to try to prevent crushing at
> the
> > partner.
> >
> > On the other hand, I've had her out in some pretty strong wind with no
> > apparent problems. In addition, doug fir is quite a bit harder than
> spruce.
> > I may just ignore it, and build a solid one if it fails...
> >
> > ----- Original Message -----
> > From: "Gordon Couger" <gcouger@...>
> > To: <bolger@egroups.com>
> > Sent: Monday, July 31, 2000 6:42 AM
> > Subject: Re: [bolger] Hollow mast plug
> >
> >
> > > Putting solid plugs in properly sized hollow mast are a good way to
> cause
> > > the mast to fail at the end of the plug. If forms a stress riser.
> > >
> > > The proper way to strengthen a tube it with diamond shaped patches or
> > > layers of fiberglass that taper from each end to the middle.
> > >
> > > Gordon
> > > Gordon Cougergcouger@...
> > > Stillwater, OK www.couger.com/gcouger
> > > 405 624-2855 GMT -6:00
> > > ----- Original Message -----
> > > From: "Richard Spelling" <richard@...>
> > > To: <bolger@egroups.com>
> > > Sent: Monday, July 31, 2000 1:20 PM
> > > Subject: [bolger] Hollow mast plug
> > >
> > >
> > > All this talk about putting solid cores in hollow masts has me
> convinced I
> > > need to put a plug in mine.
> > >
> > > No problem, cut one to fit on the table saw, put some kind of plug in
> it
> > > just above the partner, stand mast on end, climb ladder, pour in
> thickened
> > > epoxy, drive plug in.
> > >
> > > The question becomes, what is the best way to plug the mast so the
> epoxy
> > > doesn't get wasted? Needs to be liquid tight, but easy to insert four
> feet
> > > into a hollow wooden tube.
> > >
> > > Any suggestions from the collective?
> > >
> > > Richard Spelling,http://www.spellingbusiness.com/boats
> > > From the muddy waters of Oklahoma
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Bolger rules!!!
> > > - no cursing
> > > - stay on topic
> > > - use punctuation
> > > - add your comments at the TOP and SIGN your posts
> > > - add some content: send "thanks!" and "ditto!" posts off-list.
> > >
> >
> >
> >
> >
> > Bolger rules!!!
> > - no cursing
> > - stay on topic
> > - use punctuation
> > - add your comments at the TOP and SIGN your posts
> > - add some content: send "thanks!" and "ditto!" posts off-list.
> >
> >
>
>
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
Gordon, David.
I believe the failure mode is tube crushing, this is what the plug would
prevent. Don't think an external layer of epoxy/fiber of any reasonalble
thickness would help in this.
The tube is plenty strong, was only going to try to prevent crushing at the
partner.
On the other hand, I've had her out in some pretty strong wind with no
apparent problems. In addition, doug fir is quite a bit harder than spruce.
I may just ignore it, and build a solid one if it fails...
I believe the failure mode is tube crushing, this is what the plug would
prevent. Don't think an external layer of epoxy/fiber of any reasonalble
thickness would help in this.
The tube is plenty strong, was only going to try to prevent crushing at the
partner.
On the other hand, I've had her out in some pretty strong wind with no
apparent problems. In addition, doug fir is quite a bit harder than spruce.
I may just ignore it, and build a solid one if it fails...
----- Original Message -----
From: "Gordon Couger" <gcouger@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 6:42 AM
Subject: Re: [bolger] Hollow mast plug
> Putting solid plugs in properly sized hollow mast are a good way to cause
> the mast to fail at the end of the plug. If forms a stress riser.
>
> The proper way to strengthen a tube it with diamond shaped patches or
> layers of fiberglass that taper from each end to the middle.
>
> Gordon
> Gordon Cougergcouger@...
> Stillwater, OK www.couger.com/gcouger
> 405 624-2855 GMT -6:00
> ----- Original Message -----
> From: "Richard Spelling" <richard@...>
> To: <bolger@egroups.com>
> Sent: Monday, July 31, 2000 1:20 PM
> Subject: [bolger] Hollow mast plug
>
>
> All this talk about putting solid cores in hollow masts has me convinced I
> need to put a plug in mine.
>
> No problem, cut one to fit on the table saw, put some kind of plug in it
> just above the partner, stand mast on end, climb ladder, pour in thickened
> epoxy, drive plug in.
>
> The question becomes, what is the best way to plug the mast so the epoxy
> doesn't get wasted? Needs to be liquid tight, but easy to insert four feet
> into a hollow wooden tube.
>
> Any suggestions from the collective?
>
> Richard Spelling,http://www.spellingbusiness.com/boats
> From the muddy waters of Oklahoma
>
>
>
>
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
Fraser,
With your halyards inside the mast, do you have any problem with the lead on
the peak halyard, from the mast to the peak? I thought of putting a sheave
at the masthead, but decided against it as the halyard would chafe against
the side of the slot or box most of the time, wearing the rope, mast or
both. Also, what sort of sheave/box do you use for either halyard -- are
they just screwed to the wall of the mast, or is the mast reinforced there?
Jamie
-----Original Message-----
From:fraser.howell@...
[mailto:fraser.howell@...]
Sent: Monday, July 31, 2000 1:45 PM
To:bolger@egroups.com
Subject: Re: [bolger] Hollow mast plug
...One of my reasons for a hollow mast, is to run the halyards inside, so
my plug will have to have room for them...
With your halyards inside the mast, do you have any problem with the lead on
the peak halyard, from the mast to the peak? I thought of putting a sheave
at the masthead, but decided against it as the halyard would chafe against
the side of the slot or box most of the time, wearing the rope, mast or
both. Also, what sort of sheave/box do you use for either halyard -- are
they just screwed to the wall of the mast, or is the mast reinforced there?
Jamie
-----Original Message-----
From:fraser.howell@...
[mailto:fraser.howell@...]
Sent: Monday, July 31, 2000 1:45 PM
To:bolger@egroups.com
Subject: Re: [bolger] Hollow mast plug
...One of my reasons for a hollow mast, is to run the halyards inside, so
my plug will have to have room for them...
I agree that a plug overrllaappping the partner to boom jaw is needed.
As well, On my next mast, I will wrap the area of the partner with epoxy
and cloth, for protection against crushing(which is what caused my
failure, I think).
One of my reasons for a hollow mast, is to run the halyards inside, so
my plug will have to have room for them. The inside of the birdsmouth
mast is octagonal. My plug will either: a)span the opposite sides on the
inside of the octagonal, leaving room fore and aft for the 2 halyards,
or b) be octagonal, but drilled out. I intend to insert the plug, and
glue it up during assembly. I will ensure dry-fit. It might even help
with the assembly.
For the record, my hollow mast weighed 28 lb. The solid mast it replaced
(now back in service) weighs 45 lb. The old mast is whippy in comparison
to the hollow one, and makes me nervous. I didn't expect the hollow one
to break, and I am always expecting the solid one to break. Go figure.
For the plug-gluing problem, why not position the plug, drill tiny holes
through the mast walls and inject thickened epoxy with one of those
outrageously expensive WEST system syringes?
As for cassette tape as telltale, GHC, what is temporary about that?
I am now preparing the strakes for unstayed hollow mast #2. The last
one.
Cheers;
Fraser
As well, On my next mast, I will wrap the area of the partner with epoxy
and cloth, for protection against crushing(which is what caused my
failure, I think).
One of my reasons for a hollow mast, is to run the halyards inside, so
my plug will have to have room for them. The inside of the birdsmouth
mast is octagonal. My plug will either: a)span the opposite sides on the
inside of the octagonal, leaving room fore and aft for the 2 halyards,
or b) be octagonal, but drilled out. I intend to insert the plug, and
glue it up during assembly. I will ensure dry-fit. It might even help
with the assembly.
For the record, my hollow mast weighed 28 lb. The solid mast it replaced
(now back in service) weighs 45 lb. The old mast is whippy in comparison
to the hollow one, and makes me nervous. I didn't expect the hollow one
to break, and I am always expecting the solid one to break. Go figure.
For the plug-gluing problem, why not position the plug, drill tiny holes
through the mast walls and inject thickened epoxy with one of those
outrageously expensive WEST system syringes?
As for cassette tape as telltale, GHC, what is temporary about that?
I am now preparing the strakes for unstayed hollow mast #2. The last
one.
Cheers;
Fraser
I would be concerned with the liquid flowing all the way down to the sponge,
I'd have to make it awful thin, or leave a pretty good gap.
If I start at the bottom, then when the epoxy comes out around the top of
the plug, I know I've got good coverage...
Maybe I should glue a short plug, say 4 inches or so, next to the
sponge/noodle first, let it cure, then glue in the main? I could then apply
a LOT of presure to make the epoxy flow around the main plug...
Wonder if there is any reason I couldn't use Titebond II? Anybody have any
idea how big of a gap I could have and still get a good glue bond with
Titebond?
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
I'd have to make it awful thin, or leave a pretty good gap.
If I start at the bottom, then when the epoxy comes out around the top of
the plug, I know I've got good coverage...
Maybe I should glue a short plug, say 4 inches or so, next to the
sponge/noodle first, let it cure, then glue in the main? I could then apply
a LOT of presure to make the epoxy flow around the main plug...
Wonder if there is any reason I couldn't use Titebond II? Anybody have any
idea how big of a gap I could have and still get a good glue bond with
Titebond?
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
----- Original Message -----
From: "GHC" <ghartc@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 2:14 PM
Subject: Re: [bolger] Hollow mast plug
> Why not push a sponge in first, add plug, then pour a cup of liquid on
top?
>
> Gregg Carlson
>
> At 01:32 PM 7/31/2000 -0500, you wrote:
> >Sorry, cut WOOD plug on table saw, expoxy in place. Shouldn't need more
than
> >a cup of epoxy, just enough to fill the gap between the wooden plug and
the
> >mast walls.
> >
> >You think it would be liquid tite after being pushes four feet into the
> >tube?
> >
> >Richard Spelling,http://www.spellingbusiness.com/boats
> >From the muddy waters of Oklahoma
> >
> >----- Original Message -----
> >From: "Orr, Jamie" <jorr@...>
> >To: <bolger@egroups.com>
> >Sent: Monday, July 31, 2000 1:30 PM
> >Subject: RE: [bolger] Hollow mast plug
> >
> >
> >> Sounds like an expensive plug, all that epoxy, but you could control it
> >with
> >> a piece of closed cell foam, cut just bigger than the inside diameter,
and
> >> pushed into place. That should keep the epoxy where you want it.
> >>
> >> Jamie Orr
> >>
> >>
> >> -----Original Message-----
> >> From: Richard Spelling [mailto:richard@...]
> >> Sent: Monday, July 31, 2000 11:21 AM
> >> To:bolger@egroups.com
> >> Subject: [bolger] Hollow mast plug
> >>
> >>
> >>
> >> All this talk about putting solid cores in hollow masts has me
convinced I
> >> need to put a plug in mine.
> >>
> >> No problem, cut one to fit on the table saw, put some kind of plug in
it
> >> just above the partner, stand mast on end, climb ladder, pour in
thickened
> >> epoxy, drive plug in.
> >>
> >> The question becomes, what is the best way to plug the mast so the
epoxy
> >> doesn't get wasted? Needs to be liquid tight, but easy to insert four
feet
> >> into a hollow wooden tube.
> >>
> >> Any suggestions from the collective?
> >>
> >> Richard Spelling,http://www.spellingbusiness.com/boats
> >> <http://www.spellingbusiness.com/boats>
> >> From the muddy waters of Oklahoma
> >>
> >> _____
> >>
> >> <http://click.egroups.com/1/7150/13/_/3457/_/965067861/>
> >>
> ><http://adimg.egroups.com/img/7150/13/_/3457/_/965067861/468x60new13.gif>
> >>
> >> _____
> >>
> >> Bolger rules!!!
> >> - no cursing
> >> - stay on topic
> >> - use punctuation
> >> - add your comments at the TOP and SIGN your posts
> >> - add some content: send "thanks!" and "ditto!" posts off-list.
> >>
> >>
> >>
> >>
> >>
> >> Bolger rules!!!
> >> - no cursing
> >> - stay on topic
> >> - use punctuation
> >> - add your comments at the TOP and SIGN your posts
> >> - add some content: send "thanks!" and "ditto!" posts off-list.
> >>
> >
> >
> >
> >
> >Bolger rules!!!
> >- no cursing
> >- stay on topic
> >- use punctuation
> >- add your comments at the TOP and SIGN your posts
> >- add some content: send "thanks!" and "ditto!" posts off-list.
> >
> >
>
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
I seem to have come in on the end of this thread and seemed to have missed
the initial post regarding the breakage ...However I would advise against
running halyards inside a wooden mast.
A great source for wooden mast building for me has been Reull Parkers
chapter in "The New Cold Molded Boatbuilding" great way to build a mast and
bombproof as well.
Bob Wise
St Thomas USVI
the initial post regarding the breakage ...However I would advise against
running halyards inside a wooden mast.
A great source for wooden mast building for me has been Reull Parkers
chapter in "The New Cold Molded Boatbuilding" great way to build a mast and
bombproof as well.
Bob Wise
St Thomas USVI
Why not push a sponge in first, add plug, then pour a cup of liquid on top?
Gregg Carlson
At 01:32 PM 7/31/2000 -0500, you wrote:
Gregg Carlson
At 01:32 PM 7/31/2000 -0500, you wrote:
>Sorry, cut WOOD plug on table saw, expoxy in place. Shouldn't need more than
>a cup of epoxy, just enough to fill the gap between the wooden plug and the
>mast walls.
>
>You think it would be liquid tite after being pushes four feet into the
>tube?
>
>Richard Spelling,http://www.spellingbusiness.com/boats
>From the muddy waters of Oklahoma
>
>----- Original Message -----
>From: "Orr, Jamie" <jorr@...>
>To: <bolger@egroups.com>
>Sent: Monday, July 31, 2000 1:30 PM
>Subject: RE: [bolger] Hollow mast plug
>
>
>> Sounds like an expensive plug, all that epoxy, but you could control it
>with
>> a piece of closed cell foam, cut just bigger than the inside diameter, and
>> pushed into place. That should keep the epoxy where you want it.
>>
>> Jamie Orr
>>
>>
>> -----Original Message-----
>> From: Richard Spelling [mailto:richard@...]
>> Sent: Monday, July 31, 2000 11:21 AM
>> To:bolger@egroups.com
>> Subject: [bolger] Hollow mast plug
>>
>>
>>
>> All this talk about putting solid cores in hollow masts has me convinced I
>> need to put a plug in mine.
>>
>> No problem, cut one to fit on the table saw, put some kind of plug in it
>> just above the partner, stand mast on end, climb ladder, pour in thickened
>> epoxy, drive plug in.
>>
>> The question becomes, what is the best way to plug the mast so the epoxy
>> doesn't get wasted? Needs to be liquid tight, but easy to insert four feet
>> into a hollow wooden tube.
>>
>> Any suggestions from the collective?
>>
>> Richard Spelling,http://www.spellingbusiness.com/boats
>> <http://www.spellingbusiness.com/boats>
>> From the muddy waters of Oklahoma
>>
>> _____
>>
>> <http://click.egroups.com/1/7150/13/_/3457/_/965067861/>
>>
><http://adimg.egroups.com/img/7150/13/_/3457/_/965067861/468x60new13.gif>
>>
>> _____
>>
>> Bolger rules!!!
>> - no cursing
>> - stay on topic
>> - use punctuation
>> - add your comments at the TOP and SIGN your posts
>> - add some content: send "thanks!" and "ditto!" posts off-list.
>>
>>
>>
>>
>>
>> Bolger rules!!!
>> - no cursing
>> - stay on topic
>> - use punctuation
>> - add your comments at the TOP and SIGN your posts
>> - add some content: send "thanks!" and "ditto!" posts off-list.
>>
>
>
>
>
>Bolger rules!!!
>- no cursing
>- stay on topic
>- use punctuation
>- add your comments at the TOP and SIGN your posts
>- add some content: send "thanks!" and "ditto!" posts off-list.
>
>
A couple of thoughts...
Water noodle might work pretty good. Say about a six inch section.
"Thickened epoxy" has to be thin enough to flow around the plug. Will add
wood flour to get bulk, but still want it pretty watery.
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
Water noodle might work pretty good. Say about a six inch section.
"Thickened epoxy" has to be thin enough to flow around the plug. Will add
wood flour to get bulk, but still want it pretty watery.
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
----- Original Message -----
From: "Orr, Jamie" <jorr@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 1:49 PM
Subject: RE: [bolger] Hollow mast plug
> Haven't tried it, but thickened epoxy shouldn't leak (I think!) You could
> test it with water -- if it leaks, push it out from the other end or pull
it
> out with a barbed stick? You'd only lose the drying time.
>
> Mind you, if you are pushing it in a small hole and hoping it will expand
as
> the mast diameter increases, kind of like foam ear plugs, you might want
to
> test how well it will expand back to its normal shape before you stuff it
in
> there.
>
> Or wait for a better idea!
>
> -----Original Message-----
> From: Richard Spelling [mailto:richard@...]
> Sent: Monday, July 31, 2000 11:32 AM
> To:bolger@egroups.com
> Subject: Re: [bolger] Hollow mast plug
>
>
> Sorry, cut WOOD plug on table saw, expoxy in place. Shouldn't need more
than
> a cup of epoxy, just enough to fill the gap between the wooden plug and
the
> mast walls.
>
> You think it would be liquid tite after being pushes four feet into the
> tube?
>
> Richard Spelling,http://www.spellingbusiness.com/boats
> From the muddy waters of Oklahoma
>
> ----- Original Message -----
> From: "Orr, Jamie" <jorr@...>
> To: <bolger@egroups.com>
> Sent: Monday, July 31, 2000 1:30 PM
> Subject: RE: [bolger] Hollow mast plug
>
>
> > Sounds like an expensive plug, all that epoxy, but you could control it
> with
> > a piece of closed cell foam, cut just bigger than the inside diameter,
and
> > pushed into place. That should keep the epoxy where you want it.
> >
> > Jamie Orr
> >
> >
> > -----Original Message-----
> > From: Richard Spelling [mailto:richard@...]
> > Sent: Monday, July 31, 2000 11:21 AM
> > To:bolger@egroups.com
> > Subject: [bolger] Hollow mast plug
> >
> >
> >
> > All this talk about putting solid cores in hollow masts has me convinced
I
> > need to put a plug in mine.
> >
> > No problem, cut one to fit on the table saw, put some kind of plug in it
> > just above the partner, stand mast on end, climb ladder, pour in
thickened
> > epoxy, drive plug in.
> >
> > The question becomes, what is the best way to plug the mast so the epoxy
> > doesn't get wasted? Needs to be liquid tight, but easy to insert four
feet
> > into a hollow wooden tube.
> >
> > Any suggestions from the collective?
> >
> > Richard Spelling,http://www.spellingbusiness.com/boats
> > <http://www.spellingbusiness.com/boats>
> > From the muddy waters of Oklahoma
> >
> > _____
> >
> > <http://click.egroups.com/1/7150/13/_/3457/_/965067861/>
> >
> <http://adimg.egroups.com/img/7150/13/_/3457/_/965067861/468x60new13.gif>
> >
> > _____
> >
> > Bolger rules!!!
> > - no cursing
> > - stay on topic
> > - use punctuation
> > - add your comments at the TOP and SIGN your posts
> > - add some content: send "thanks!" and "ditto!" posts off-list.
> >
> >
> >
> >
> >
> > Bolger rules!!!
> > - no cursing
> > - stay on topic
> > - use punctuation
> > - add your comments at the TOP and SIGN your posts
> > - add some content: send "thanks!" and "ditto!" posts off-list.
> >
>
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
Haven't tried it, but thickened epoxy shouldn't leak (I think!) You could
test it with water -- if it leaks, push it out from the other end or pull it
out with a barbed stick? You'd only lose the drying time.
Mind you, if you are pushing it in a small hole and hoping it will expand as
the mast diameter increases, kind of like foam ear plugs, you might want to
test how well it will expand back to its normal shape before you stuff it in
there.
Or wait for a better idea!
-----Original Message-----
From: Richard Spelling [mailto:richard@...]
Sent: Monday, July 31, 2000 11:32 AM
To:bolger@egroups.com
Subject: Re: [bolger] Hollow mast plug
Sorry, cut WOOD plug on table saw, expoxy in place. Shouldn't need more than
a cup of epoxy, just enough to fill the gap between the wooden plug and the
mast walls.
You think it would be liquid tite after being pushes four feet into the
tube?
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
test it with water -- if it leaks, push it out from the other end or pull it
out with a barbed stick? You'd only lose the drying time.
Mind you, if you are pushing it in a small hole and hoping it will expand as
the mast diameter increases, kind of like foam ear plugs, you might want to
test how well it will expand back to its normal shape before you stuff it in
there.
Or wait for a better idea!
-----Original Message-----
From: Richard Spelling [mailto:richard@...]
Sent: Monday, July 31, 2000 11:32 AM
To:bolger@egroups.com
Subject: Re: [bolger] Hollow mast plug
Sorry, cut WOOD plug on table saw, expoxy in place. Shouldn't need more than
a cup of epoxy, just enough to fill the gap between the wooden plug and the
mast walls.
You think it would be liquid tite after being pushes four feet into the
tube?
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
----- Original Message -----
From: "Orr, Jamie" <jorr@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 1:30 PM
Subject: RE: [bolger] Hollow mast plug
> Sounds like an expensive plug, all that epoxy, but you could control it
with
> a piece of closed cell foam, cut just bigger than the inside diameter, and
> pushed into place. That should keep the epoxy where you want it.
>
> Jamie Orr
>
>
> -----Original Message-----
> From: Richard Spelling [mailto:richard@...]
> Sent: Monday, July 31, 2000 11:21 AM
> To:bolger@egroups.com
> Subject: [bolger] Hollow mast plug
>
>
>
> All this talk about putting solid cores in hollow masts has me convinced I
> need to put a plug in mine.
>
> No problem, cut one to fit on the table saw, put some kind of plug in it
> just above the partner, stand mast on end, climb ladder, pour in thickened
> epoxy, drive plug in.
>
> The question becomes, what is the best way to plug the mast so the epoxy
> doesn't get wasted? Needs to be liquid tight, but easy to insert four feet
> into a hollow wooden tube.
>
> Any suggestions from the collective?
>
> Richard Spelling,http://www.spellingbusiness.com/boats
> <http://www.spellingbusiness.com/boats>
> From the muddy waters of Oklahoma
>
> _____
>
> <http://click.egroups.com/1/7150/13/_/3457/_/965067861/>
>
<http://adimg.egroups.com/img/7150/13/_/3457/_/965067861/468x60new13.gif>
>
> _____
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
>
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
Bolger rules!!!
- no cursing
- stay on topic
- use punctuation
- add your comments at the TOP and SIGN your posts
- add some content: send "thanks!" and "ditto!" posts off-list.
Sorry, cut WOOD plug on table saw, expoxy in place. Shouldn't need more than
a cup of epoxy, just enough to fill the gap between the wooden plug and the
mast walls.
You think it would be liquid tite after being pushes four feet into the
tube?
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
a cup of epoxy, just enough to fill the gap between the wooden plug and the
mast walls.
You think it would be liquid tite after being pushes four feet into the
tube?
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma
----- Original Message -----
From: "Orr, Jamie" <jorr@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 1:30 PM
Subject: RE: [bolger] Hollow mast plug
> Sounds like an expensive plug, all that epoxy, but you could control it
with
> a piece of closed cell foam, cut just bigger than the inside diameter, and
> pushed into place. That should keep the epoxy where you want it.
>
> Jamie Orr
>
>
> -----Original Message-----
> From: Richard Spelling [mailto:richard@...]
> Sent: Monday, July 31, 2000 11:21 AM
> To:bolger@egroups.com
> Subject: [bolger] Hollow mast plug
>
>
>
> All this talk about putting solid cores in hollow masts has me convinced I
> need to put a plug in mine.
>
> No problem, cut one to fit on the table saw, put some kind of plug in it
> just above the partner, stand mast on end, climb ladder, pour in thickened
> epoxy, drive plug in.
>
> The question becomes, what is the best way to plug the mast so the epoxy
> doesn't get wasted? Needs to be liquid tight, but easy to insert four feet
> into a hollow wooden tube.
>
> Any suggestions from the collective?
>
> Richard Spelling,http://www.spellingbusiness.com/boats
> <http://www.spellingbusiness.com/boats>
> From the muddy waters of Oklahoma
>
> _____
>
> <http://click.egroups.com/1/7150/13/_/3457/_/965067861/>
>
<http://adimg.egroups.com/img/7150/13/_/3457/_/965067861/468x60new13.gif>
>
> _____
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
>
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
Sounds like an expensive plug, all that epoxy, but you could control it with
a piece of closed cell foam, cut just bigger than the inside diameter, and
pushed into place. That should keep the epoxy where you want it.
Jamie Orr
-----Original Message-----
From: Richard Spelling [mailto:richard@...]
Sent: Monday, July 31, 2000 11:21 AM
To:bolger@egroups.com
Subject: [bolger] Hollow mast plug
All this talk about putting solid cores in hollow masts has me convinced I
need to put a plug in mine.
No problem, cut one to fit on the table saw, put some kind of plug in it
just above the partner, stand mast on end, climb ladder, pour in thickened
epoxy, drive plug in.
The question becomes, what is the best way to plug the mast so the epoxy
doesn't get wasted? Needs to be liquid tight, but easy to insert four feet
into a hollow wooden tube.
Any suggestions from the collective?
Richard Spelling,http://www.spellingbusiness.com/boats
<http://www.spellingbusiness.com/boats>
From the muddy waters of Oklahoma
_____
<http://click.egroups.com/1/7150/13/_/3457/_/965067861/>
<http://adimg.egroups.com/img/7150/13/_/3457/_/965067861/468x60new13.gif>
_____
Bolger rules!!!
- no cursing
- stay on topic
- use punctuation
- add your comments at the TOP and SIGN your posts
- add some content: send "thanks!" and "ditto!" posts off-list.
a piece of closed cell foam, cut just bigger than the inside diameter, and
pushed into place. That should keep the epoxy where you want it.
Jamie Orr
-----Original Message-----
From: Richard Spelling [mailto:richard@...]
Sent: Monday, July 31, 2000 11:21 AM
To:bolger@egroups.com
Subject: [bolger] Hollow mast plug
All this talk about putting solid cores in hollow masts has me convinced I
need to put a plug in mine.
No problem, cut one to fit on the table saw, put some kind of plug in it
just above the partner, stand mast on end, climb ladder, pour in thickened
epoxy, drive plug in.
The question becomes, what is the best way to plug the mast so the epoxy
doesn't get wasted? Needs to be liquid tight, but easy to insert four feet
into a hollow wooden tube.
Any suggestions from the collective?
Richard Spelling,http://www.spellingbusiness.com/boats
<http://www.spellingbusiness.com/boats>
From the muddy waters of Oklahoma
_____
<http://click.egroups.com/1/7150/13/_/3457/_/965067861/>
<http://adimg.egroups.com/img/7150/13/_/3457/_/965067861/468x60new13.gif>
_____
Bolger rules!!!
- no cursing
- stay on topic
- use punctuation
- add your comments at the TOP and SIGN your posts
- add some content: send "thanks!" and "ditto!" posts off-list.
By a diamond shaped plate I mean a plate that conforms to the mast and
tapers to a point on each end. Cut a diamond out of a piece of paper wiht
the long axis being at least 3 times the
narrow axis. Bend the paper so it conforms wiht the mast. Epoxy or
rivet(in the case of an alumium mast) the patch to the mast. All the
contact from the boom or spar should contact the metal diamond. The
diamond shape reduces the stress risers to a minim.
There will still be a stiff spot in the mast but the stress will be
distributed along the edge of the diamond patch and will be much less
likely a place for the mast to break.
Gordon
Gordon Cougergcouger@...
Stillwater, OK www.couger.com/gcouger
405 624-2855 GMT -6:00
tapers to a point on each end. Cut a diamond out of a piece of paper wiht
the long axis being at least 3 times the
narrow axis. Bend the paper so it conforms wiht the mast. Epoxy or
rivet(in the case of an alumium mast) the patch to the mast. All the
contact from the boom or spar should contact the metal diamond. The
diamond shape reduces the stress risers to a minim.
There will still be a stiff spot in the mast but the stress will be
distributed along the edge of the diamond patch and will be much less
likely a place for the mast to break.
Gordon
Gordon Cougergcouger@...
Stillwater, OK www.couger.com/gcouger
405 624-2855 GMT -6:00
----- Original Message -----
From: "Richard Spelling" <richard@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 8:48 PM
Subject: Re: [bolger] Hollow mast plug
> Can you describe a "diamond shaped metal plate"? Where would it be
going?
>
> I agree with you that it would probably break at the end of the plug,
this
> is why I've pretty much reconsidered doing anything to it.
>
> It doesn't appear to have any crushing problems so far, and if it does
snap,
> I'm a daysailer, I'll troll home and make a solid mast.
>
> ----- Original Message -----
> From: "Gordon Couger" <gcouger@...>
> To: <bolger@egroups.com>
> Sent: Monday, July 31, 2000 7:18 AM
> Subject: Re: [bolger] Hollow mast plug
>
>
> > If you want to prevent crushing a diamond shaped metal plate will do a
lot
> > better than plug. The outer part of the mast will still crush. If you
have
> > crushing problems you should spread them over the mast.
> >
> > Take an broken fishing pole and epoxy a plug in it and bend it until
it
> > breaks. I bet you ten bucks it breaks at the end of the plug.
> >
> > Gordon
> > Gordon Cougergcouger@...
> > Stillwater, OK www.couger.com/gcouger
> > 405 624-2855 GMT -6:00
> > ----- Original Message -----
> > From: "Richard Spelling" <richard@...>
> > To: <bolger@egroups.com>
> > Sent: Monday, July 31, 2000 6:53 PM
> > Subject: Re: [bolger] Hollow mast plug
> >
> >
> > > Gordon, David.
> > >
> > > I believe the failure mode is tube crushing, this is what the plug
would
> > > prevent. Don't think an external layer of epoxy/fiber of any
reasonalble
> > > thickness would help in this.
> > >
> > > The tube is plenty strong, was only going to try to prevent crushing
at
> > the
> > > partner.
> > >
> > > On the other hand, I've had her out in some pretty strong wind with
no
> > > apparent problems. In addition, doug fir is quite a bit harder than
> > spruce.
> > > I may just ignore it, and build a solid one if it fails...
> > >
> > > ----- Original Message -----
> > > From: "Gordon Couger" <gcouger@...>
> > > To: <bolger@egroups.com>
> > > Sent: Monday, July 31, 2000 6:42 AM
> > > Subject: Re: [bolger] Hollow mast plug
> > >
> > >
> > > > Putting solid plugs in properly sized hollow mast are a good way
to
> > cause
> > > > the mast to fail at the end of the plug. If forms a stress riser.
> > > >
> > > > The proper way to strengthen a tube it with diamond shaped
patches or
> > > > layers of fiberglass that taper from each end to the middle.
> > > >
> > > > Gordon
> > > > Gordon Cougergcouger@...
> > > > Stillwater, OK www.couger.com/gcouger
> > > > 405 624-2855 GMT -6:00
> > > > ----- Original Message -----
> > > > From: "Richard Spelling" <richard@...>
> > > > To: <bolger@egroups.com>
> > > > Sent: Monday, July 31, 2000 1:20 PM
> > > > Subject: [bolger] Hollow mast plug
> > > >
> > > >
> > > > All this talk about putting solid cores in hollow masts has me
> > convinced I
> > > > need to put a plug in mine.
> > > >
> > > > No problem, cut one to fit on the table saw, put some kind of plug
in
> > it
> > > > just above the partner, stand mast on end, climb ladder, pour in
> > thickened
> > > > epoxy, drive plug in.
> > > >
> > > > The question becomes, what is the best way to plug the mast so the
> > epoxy
> > > > doesn't get wasted? Needs to be liquid tight, but easy to insert
four
> > feet
> > > > into a hollow wooden tube.
> > > >
> > > > Any suggestions from the collective?
> > > >
> > > > Richard Spelling,http://www.spellingbusiness.com/boats
> > > > From the muddy waters of Oklahoma
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Bolger rules!!!
> > > > - no cursing
> > > > - stay on topic
> > > > - use punctuation
> > > > - add your comments at the TOP and SIGN your posts
> > > > - add some content: send "thanks!" and "ditto!" posts off-list.
> > > >
> > >
> > >
> > >
> > >
> > > Bolger rules!!!
> > > - no cursing
> > > - stay on topic
> > > - use punctuation
> > > - add your comments at the TOP and SIGN your posts
> > > - add some content: send "thanks!" and "ditto!" posts off-list.
> > >
> > >
> >
> >
> >
> >
> >
> > Bolger rules!!!
> > - no cursing
> > - stay on topic
> > - use punctuation
> > - add your comments at the TOP and SIGN your posts
> > - add some content: send "thanks!" and "ditto!" posts off-list.
> >
>
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
>
If you want to prevent crushing a diamond shaped metal plate will do a lot
better than plug. The outer part of the mast will still crush. If you have
crushing problems you should spread them over the mast.
Take an broken fishing pole and epoxy a plug in it and bend it until it
breaks. I bet you ten bucks it breaks at the end of the plug.
Gordon
Gordon Cougergcouger@...
Stillwater, OK www.couger.com/gcouger
405 624-2855 GMT -6:00
better than plug. The outer part of the mast will still crush. If you have
crushing problems you should spread them over the mast.
Take an broken fishing pole and epoxy a plug in it and bend it until it
breaks. I bet you ten bucks it breaks at the end of the plug.
Gordon
Gordon Cougergcouger@...
Stillwater, OK www.couger.com/gcouger
405 624-2855 GMT -6:00
----- Original Message -----
From: "Richard Spelling" <richard@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 6:53 PM
Subject: Re: [bolger] Hollow mast plug
> Gordon, David.
>
> I believe the failure mode is tube crushing, this is what the plug would
> prevent. Don't think an external layer of epoxy/fiber of any reasonalble
> thickness would help in this.
>
> The tube is plenty strong, was only going to try to prevent crushing at
the
> partner.
>
> On the other hand, I've had her out in some pretty strong wind with no
> apparent problems. In addition, doug fir is quite a bit harder than
spruce.
> I may just ignore it, and build a solid one if it fails...
>
> ----- Original Message -----
> From: "Gordon Couger" <gcouger@...>
> To: <bolger@egroups.com>
> Sent: Monday, July 31, 2000 6:42 AM
> Subject: Re: [bolger] Hollow mast plug
>
>
> > Putting solid plugs in properly sized hollow mast are a good way to
cause
> > the mast to fail at the end of the plug. If forms a stress riser.
> >
> > The proper way to strengthen a tube it with diamond shaped patches or
> > layers of fiberglass that taper from each end to the middle.
> >
> > Gordon
> > Gordon Cougergcouger@...
> > Stillwater, OK www.couger.com/gcouger
> > 405 624-2855 GMT -6:00
> > ----- Original Message -----
> > From: "Richard Spelling" <richard@...>
> > To: <bolger@egroups.com>
> > Sent: Monday, July 31, 2000 1:20 PM
> > Subject: [bolger] Hollow mast plug
> >
> >
> > All this talk about putting solid cores in hollow masts has me
convinced I
> > need to put a plug in mine.
> >
> > No problem, cut one to fit on the table saw, put some kind of plug in
it
> > just above the partner, stand mast on end, climb ladder, pour in
thickened
> > epoxy, drive plug in.
> >
> > The question becomes, what is the best way to plug the mast so the
epoxy
> > doesn't get wasted? Needs to be liquid tight, but easy to insert four
feet
> > into a hollow wooden tube.
> >
> > Any suggestions from the collective?
> >
> > Richard Spelling,http://www.spellingbusiness.com/boats
> > From the muddy waters of Oklahoma
> >
> >
> >
> >
> >
> >
> >
> > Bolger rules!!!
> > - no cursing
> > - stay on topic
> > - use punctuation
> > - add your comments at the TOP and SIGN your posts
> > - add some content: send "thanks!" and "ditto!" posts off-list.
> >
>
>
>
>
> Bolger rules!!!
> - no cursing
> - stay on topic
> - use punctuation
> - add your comments at the TOP and SIGN your posts
> - add some content: send "thanks!" and "ditto!" posts off-list.
>
>
Putting solid plugs in properly sized hollow mast are a good way to cause
the mast to fail at the end of the plug. If forms a stress riser.
The proper way to strengthen a tube it with diamond shaped patches or
layers of fiberglass that taper from each end to the middle.
Gordon
Gordon Cougergcouger@...
Stillwater, OK www.couger.com/gcouger
405 624-2855 GMT -6:00
the mast to fail at the end of the plug. If forms a stress riser.
The proper way to strengthen a tube it with diamond shaped patches or
layers of fiberglass that taper from each end to the middle.
Gordon
Gordon Cougergcouger@...
Stillwater, OK www.couger.com/gcouger
405 624-2855 GMT -6:00
----- Original Message -----
From: "Richard Spelling" <richard@...>
To: <bolger@egroups.com>
Sent: Monday, July 31, 2000 1:20 PM
Subject: [bolger] Hollow mast plug
All this talk about putting solid cores in hollow masts has me convinced I
need to put a plug in mine.
No problem, cut one to fit on the table saw, put some kind of plug in it
just above the partner, stand mast on end, climb ladder, pour in thickened
epoxy, drive plug in.
The question becomes, what is the best way to plug the mast so the epoxy
doesn't get wasted? Needs to be liquid tight, but easy to insert four feet
into a hollow wooden tube.
Any suggestions from the collective?
Richard Spelling,http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma