Re: New Year Bolger thoughts
Being partly Welsh, as my dad had it, means you HAVE to sing, doesn't
necessarily means that you're good at it <g>.
Hey, I'm not 60 (yet). My mom was a real bobbysockser, had tons of
Frank's records - and lots of Big Band stuff too. Some of us Baby
Boomers had lots of opportunities to listen to this stuff, just like
my kids had to hear all that sixties crap I played.
Bryant OWEN (probably a distant relation to George Owen, NA)
necessarily means that you're good at it <g>.
Hey, I'm not 60 (yet). My mom was a real bobbysockser, had tons of
Frank's records - and lots of Big Band stuff too. Some of us Baby
Boomers had lots of opportunities to listen to this stuff, just like
my kids had to hear all that sixties crap I played.
Bryant OWEN (probably a distant relation to George Owen, NA)
--- Inbolger@yahoogroups.com, Harry James <welshman@p...> wrote:
> My very first memory was going into the hospital at the age of four
to
> get my tonsils out and the nurse asking me "where's your trumpet
Harry".
> I have heard it one or two times since.
>
> For the record I play Saxophone and 5 string Banjo, and because I
am
> partly Welsh, I have to sing.
>
> HJ
--- Inbolger@yahoogroups.com, "pvanderwaart" <pvanderwaart@y wrote:>
Ah, yes, but... are you under 60 - as I suspect?
>***************
> Once upon a time, circa 1970, I was in an East Asian Republic,
> courtesy of Uncle Sam, serving as bandsman for the US Army. As was
> his habit, fellow name of Bob Hope brought a song and humor show into
> the field. It fell to us to play for the audience for the few hours
> that it took to get several thousand troops in from the jungle (well,
> brush).
>
> So, I saw Les Brown, as well as his band of reknown, in person.
>
> Also, Neil Armstrong, Theresa Brewer, Connie Stevens, and a lovely
> German (or possibly Austrian) Miss World.
>
> Peter
Ah, yes, but... are you under 60 - as I suspect?
> I certainly know Les Brown & his band of reknown.Once upon a time, circa 1970, I was in an East Asian Republic,
courtesy of Uncle Sam, serving as bandsman for the US Army. As was
his habit, fellow name of Bob Hope brought a song and humor show into
the field. It fell to us to play for the audience for the few hours
that it took to get several thousand troops in from the jungle (well,
brush).
So, I saw Les Brown, as well as his band of reknown, in person.
Also, Neil Armstrong, Theresa Brewer, Connie Stevens, and a lovely
German (or possibly Austrian) Miss World.
Peter
--- Inbolger@yahoogroups.com, "Howard Stephenson" <stephensonhw@a...>
wrote:
Howard,
Hold up there hepcat. Mostly I'm a lurker here, but couldn't let that
one go. I'm substantially under 60, recently turned 39 (again), and I
certainly know Les Brown & his band of reknown. Of course, I played
trumpet for a few years. Right now I'm listening to a random selection
of: Glenn Miller; Miles Davis; Benny Goodman; Cab Calloway; Duke
Ellington. This kind of music keeps me hopping while I work on the
boat we're currently building.
Cheers,
David Graybeal
Portland, OR.
"You know what I miss about the good old days? I wasn't so good & I
wasn't so old" - Groucho Marx
wrote:
>*******************
> A nice tribute to this group, Harry. But do you still keep up the
> trumpet playing? One of my model yacht racing friends goes by the
> name of Les Brown. (The above will be a mystery to most people under
> about 60).
>
> Howard
>
> --- Inbolger@yahoogroups.com, Harry James
> > The answer was "absolutely nothing is wrong, things are very
> > right". I was really coming home.
Howard,
Hold up there hepcat. Mostly I'm a lurker here, but couldn't let that
one go. I'm substantially under 60, recently turned 39 (again), and I
certainly know Les Brown & his band of reknown. Of course, I played
trumpet for a few years. Right now I'm listening to a random selection
of: Glenn Miller; Miles Davis; Benny Goodman; Cab Calloway; Duke
Ellington. This kind of music keeps me hopping while I work on the
boat we're currently building.
Cheers,
David Graybeal
Portland, OR.
"You know what I miss about the good old days? I wasn't so good & I
wasn't so old" - Groucho Marx
My very first memory was going into the hospital at the age of four to
get my tonsils out and the nurse asking me "where's your trumpet Harry".
I have heard it one or two times since.
For the record I play Saxophone and 5 string Banjo, and because I am
partly Welsh, I have to sing.
HJ
Howard Stephenson wrote:
get my tonsils out and the nurse asking me "where's your trumpet Harry".
I have heard it one or two times since.
For the record I play Saxophone and 5 string Banjo, and because I am
partly Welsh, I have to sing.
HJ
Howard Stephenson wrote:
>A nice tribute to this group, Harry. But do you still keep up the
>trumpet playing? One of my model yacht racing friends goes by the
>name of Les Brown. (The above will be a mystery to most people under
>about 60).
>
>Howard
>
>--- Inbolger@yahoogroups.com, Harry James
>
>
>>The answer was "absolutely nothing is wrong, things are very
>>right". I was really coming home.
>>
>>
>
>
>
>
>
>
>Bolger rules!!!
>- no cursing, flaming, trolling, spamming, or flogging dead horses
>- stay on topic, stay on thread, punctuate, no 'Ed, thanks, Fred' posts
>- Pls add your comments at the TOP, SIGN your posts, and snip away
>- Plans: Mr. Philip C. Bolger, P.O. Box 1209, Gloucester, MA, 01930, Fax: (978) 282-1349
>- Unsubscribe:bolger-unsubscribe@yahoogroups.com
>- Open discussion:bolger_coffee_lounge-subscribe@yahoogroups.com
>Yahoo! Groups Links
>
>
>
>
>
>
>
>.
>
>
>
A nice tribute to this group, Harry. But do you still keep up the
trumpet playing? One of my model yacht racing friends goes by the
name of Les Brown. (The above will be a mystery to most people under
about 60).
Howard
--- Inbolger@yahoogroups.com, Harry James
trumpet playing? One of my model yacht racing friends goes by the
name of Les Brown. (The above will be a mystery to most people under
about 60).
Howard
--- Inbolger@yahoogroups.com, Harry James
> The answer was "absolutely nothing is wrong, things are very
> right". I was really coming home.
> >How about UMHD strakes like Bruce used on Rose?<grin> Having UHMW skid strips on the boat was also useful when
>
> Yes, and it sounds like another good area to learn more about. I have used
> it for small sliding parts---but why not the boat. BTW, I plan to take the
> boat all the way to the water on the trailer ;-)
pushing/pulling the boat around in my shop and driveway during
construction. It makes sense to reinforce the 'points of contact'
of the hull, the center bottom of the fin keel, and the center
edges of the chines.
Nels wrote:
not seen Bolger address them specifically, but it strikes me as most
desirable to make the foam and plywood into a sandwich, with strong
adhesive. Structurally, this increases the strength for forces pulling from
the outside, that may occur when the boat is heeled. Also important, is to
prevent voids that can collect water. I was planning to use some 2-part
expanding foam in small left-over volumes around the foam sheets.
I have used the expanding foam before, and I remember problems in
controlling the stuff! It sometimes didn't want to go where you wanted,
and other times wanted to sneak out through cracks. I want to have all the
expanding foam in place before putting the inner plywood on. This allows
cleanup and redo of missed areas. The expanding foam I used also required
good ventilation! Maybe they have better products now, as this was 15
years ago.
John K., I plan to do some small test panels with the foam sandwich. I can
drop off a sample for you to play with if you want? This will probably be
early Feb. You will probably think of good ways to torture the stuff.
David was working with! Thanks. I agree on the use of glass for the 1/4"
plywood, but it probably could be thinner than the bottom.
it for small sliding parts---but why not the boat. BTW, I plan to take the
boat all the way to the water on the trailer ;-)
I am really curious about the slot closure system. Can you elaborate
on that?
Bolger does not overburden us with details for the hard hatches. Made up in
four overlapping sections, they are again fabricated from a sandwich of
1-inch foam with 3mm plywood top and bottom. The aft section has a 32-inch
cover that hinges forward. They sit just high enough over the
standing-room comings to allow drainage between sections. There are no
suggestions for stowage. As drawn, they are too long to fit in the forward
compartment.
These hatches are somewhat large, typically 2x4 feet. I will try to report
later on their apparent ability to bear weight. Again this is the sandwich
question. They also are easy to modify/replace, if needed.
My present plan is to build this type of hatch for the forward and aft
compartments and start out with a minimal soft cover for the middle (plus a
middle tent for camping). I'm still looking for proper latches.
Many thanks to all for the fine comments!
Bob
>I am not certain if the hull is a TRUE ply/foam/ply sandwichThe installation of the foam presents several interesting issues. I have
>construction as the foam is not laminated to the plywood. Or is it? I
>am not sure if it is meant to be a structural component. Of course
>the doubled ply is really strong by itself - even without the foam!
not seen Bolger address them specifically, but it strikes me as most
desirable to make the foam and plywood into a sandwich, with strong
adhesive. Structurally, this increases the strength for forces pulling from
the outside, that may occur when the boat is heeled. Also important, is to
prevent voids that can collect water. I was planning to use some 2-part
expanding foam in small left-over volumes around the foam sheets.
I have used the expanding foam before, and I remember problems in
controlling the stuff! It sometimes didn't want to go where you wanted,
and other times wanted to sneak out through cracks. I want to have all the
expanding foam in place before putting the inner plywood on. This allows
cleanup and redo of missed areas. The expanding foam I used also required
good ventilation! Maybe they have better products now, as this was 15
years ago.
John K., I plan to do some small test panels with the foam sandwich. I can
drop off a sample for you to play with if you want? This will probably be
early Feb. You will probably think of good ways to torture the stuff.
>If I wasNels, on the build up for the sides, I now understand the constraints that
>to use 3/8" MDO I would only glass below the waterline. If I used
>1/4" I would glass the entire exterior. The weight would probably end
>up the same. Of course it also depends on what kind of plywood one
>uses.
David was working with! Thanks. I agree on the use of glass for the 1/4"
plywood, but it probably could be thinner than the bottom.
>Yes, and it sounds like another good area to learn more about. I have used
>A great asset of the design is it's 6" draft and low momemntum which
>means it will pass right over most obstructions or just bounce off
>with nary more than a scratch. All blows will be glancing with the
>exception of the bottom and chimes and these are easily reinforced
>with extra glass taping, or even a sacrificial skid.
>
>How about UMHD strakes like Bruce used on Rose?
it for small sliding parts---but why not the boat. BTW, I plan to take the
boat all the way to the water on the trailer ;-)
I am really curious about the slot closure system. Can you elaborate
on that?
Bolger does not overburden us with details for the hard hatches. Made up in
four overlapping sections, they are again fabricated from a sandwich of
1-inch foam with 3mm plywood top and bottom. The aft section has a 32-inch
cover that hinges forward. They sit just high enough over the
standing-room comings to allow drainage between sections. There are no
suggestions for stowage. As drawn, they are too long to fit in the forward
compartment.
These hatches are somewhat large, typically 2x4 feet. I will try to report
later on their apparent ability to bear weight. Again this is the sandwich
question. They also are easy to modify/replace, if needed.
My present plan is to build this type of hatch for the forward and aft
compartments and start out with a minimal soft cover for the middle (plus a
middle tent for camping). I'm still looking for proper latches.
Many thanks to all for the fine comments!
Bob
--- Inbolger@yahoogroups.com, Philip Smith <pbs@w...> wrote:
really got your hands full and your world is not made better with
the presence of less toxic elements either within the hull materials
and your boats contents :-0
However, some plastics do off-gas for many,many months and this may
be more delitrious to ones health in the long run......I think :-)
Sincerely,
Peter Lenihan
> When choosing a foam you should also consider anyHmmmmm.....seems to me that if your boat is on FIRE(yikes!) you've
> toxic fumes it might give off if it and your boat
> happen to catch fire.
really got your hands full and your world is not made better with
the presence of less toxic elements either within the hull materials
and your boats contents :-0
However, some plastics do off-gas for many,many months and this may
be more delitrious to ones health in the long run......I think :-)
Sincerely,
Peter Lenihan
When choosing a foam you should also consider any
toxic fumes it might give off if it and your boat
happen to catch fire. Different foams have very
different levels of toxicity.
You may want to give yourself a chance to drown before
you die from poisoning.
Phil Smith
toxic fumes it might give off if it and your boat
happen to catch fire. Different foams have very
different levels of toxicity.
You may want to give yourself a chance to drown before
you die from poisoning.
Phil Smith
--- Inbolger@yahoogroups.com, jhkohnen@b... wrote:
of materials for BWII, including the brand name of the foam.
If you Google you will find there are some very impressive home-
building insulation foams. Limited only by your pocket book. Some
have instructions on the net showing which adhesives to use and the
type of strapping. To me these foams will stand up to boat use and
are well in keeping with Bolger boxes.
Cheers, Nels
> What does Bolger recommend using for the foam?If you check the links on this site there is a folder giving a list
of materials for BWII, including the brand name of the foam.
If you Google you will find there are some very impressive home-
building insulation foams. Limited only by your pocket book. Some
have instructions on the net showing which adhesives to use and the
type of strapping. To me these foams will stand up to boat use and
are well in keeping with Bolger boxes.
Cheers, Nels
What does Bolger recommend using for the foam? I gave some thought to
plywood/foam composite construction a few years ago when I tried building a
Brick with composite sides (I made some errors and finally threw my hands up
in disgust and scrapped it). For my use I figured insulation foam sheets
would work fine, but for something more ambitious I wondered if they had
enough strength. When stressed would the foam fail internally? Would
repeated stresses cause cumulative damage until you just had foam dust
between the sheets of plywood? Perhaps I was being overly pessimistic...
plywood/foam composite construction a few years ago when I tried building a
Brick with composite sides (I made some errors and finally threw my hands up
in disgust and scrapped it). For my use I figured insulation foam sheets
would work fine, but for something more ambitious I wondered if they had
enough strength. When stressed would the foam fail internally? Would
repeated stresses cause cumulative damage until you just had foam dust
between the sheets of plywood? Perhaps I was being overly pessimistic...
On Sat, 01 Jan 2005 10:10:44 -0800, Bob L wrote:
> ...
> This also assumes that the foam does not fail by being squished. I think
> this may be a reasonable assumption. The foam is not resistant to a sharp
> object, but if the load is distributed over a large area, as the walls
tend
> to do, it becomes difficult to compress.
> ...
--
John <jkohnen@...>
http://www.boat-links.com/
It s a damn poor mind that can think of only one way to spell a word!
<Attributed to Andrew Jackson>
You think we're great? I hope you get a chance to meet
Phil and Susanne! They are some of the nicest and
smartest people it will ever be your pleasure to meet.
Not to mention creative, atistic, funny, considerate,
insightful and more, much more.
Welcome back, Happy New Year, and best of luck.
Phil Smith
Phil and Susanne! They are some of the nicest and
smartest people it will ever be your pleasure to meet.
Not to mention creative, atistic, funny, considerate,
insightful and more, much more.
Welcome back, Happy New Year, and best of luck.
Phil Smith
This one has been perking around in my thoughts for quite a while, as I
am feeling particularly maudlin this fine New Years morning I will try
and get it down coherently.
In early September last year I returned from a years National Guard
mobilization. I had stopped the emails from my various Yahoo groups when
I was mobilized. While going through demobilization at Ft McCoy
Wisconsin I was able to get on line and I thought --what the heck-- I
will reactivate my Yahoo accounts. I got emails started again from all
of them and then started to read back the last few days of messages on
the Bolger list. There you all were-- Peter L, the Bruce H's, David R
and Sue F with the plans still not finished for the I -60 , many other
familiar names, just like no time had passed at all. It was a tremendous
emotional impact, I was back in a part of the world I had been
completely separated from.
A friend caught me furtively wiping my eyes and asked me what was wrong.
The answer was "absolutely nothing is wrong, things are very right". I
was really coming home.
This group has always been a little different from other groups that I
belong to, lots of adjective's come to mind, helpful, humorous,
knowlegable, I have had a hard time pinning this one down. Mostly you
are just human the way we want humans to be, all the positive stuff none
of the negative. You are the people I would want as neighbors.
So have a happy Bolger new year, may your tools be sharp and your
plywood void less.
Harry James from Juneau where the Taku is blowing, the weak winter sun
is shining and the shop is warm and full of wood.
am feeling particularly maudlin this fine New Years morning I will try
and get it down coherently.
In early September last year I returned from a years National Guard
mobilization. I had stopped the emails from my various Yahoo groups when
I was mobilized. While going through demobilization at Ft McCoy
Wisconsin I was able to get on line and I thought --what the heck-- I
will reactivate my Yahoo accounts. I got emails started again from all
of them and then started to read back the last few days of messages on
the Bolger list. There you all were-- Peter L, the Bruce H's, David R
and Sue F with the plans still not finished for the I -60 , many other
familiar names, just like no time had passed at all. It was a tremendous
emotional impact, I was back in a part of the world I had been
completely separated from.
A friend caught me furtively wiping my eyes and asked me what was wrong.
The answer was "absolutely nothing is wrong, things are very right". I
was really coming home.
This group has always been a little different from other groups that I
belong to, lots of adjective's come to mind, helpful, humorous,
knowlegable, I have had a hard time pinning this one down. Mostly you
are just human the way we want humans to be, all the positive stuff none
of the negative. You are the people I would want as neighbors.
So have a happy Bolger new year, may your tools be sharp and your
plywood void less.
Harry James from Juneau where the Taku is blowing, the weak winter sun
is shining and the shop is warm and full of wood.
On Fri, 31 Dec 2004 Jim Clements wrote:
second set of oar ports in BW-2, but I didn't detect much interest!!
Bob
>I'm about to take the plunge to build the Amhearst Galley with is a longerHi Jim - sounds like a fine project! I talked to my wife about adding a
>version of the Birdwatcher for 8 rowers. Good luck with yours. I hope
>I'm not getting in over my head.
second set of oar ports in BW-2, but I didn't detect much interest!!
Bob
--- Inbolger@yahoogroups.com, Bob Larkin <boblark@p...> wrote:
I would just like to say that all you spoke of is probably correct
and I know David would agree. His decisions were based on available
materials and limited resources and he is in no way endorsing them
for others. He estimates that the boat will be about 40 lb heavier
and have 25% less floatation in the hull. Of course BWI has no hull
floatation except in the ends so that can be easily made up for. And
the end weight will also depend on how much glass is added. If I was
to use 3/8" MDO I would only glass below the waterline. If I used
1/4" I would glass the entire exterior. The weight would probably end
up the same. Of course it also depends on what kind of plywood one
uses.
3/4' foam and 1X lumber (which is only 3/4" thick) are both far
cheaper than the 1" thickness items. David bought his at Home Despot.
I am not certain if the hull is a TRUE ply/foam/ply sandwich
construction as the foam is not laminated to the plywood. Or is it? I
am not sure if it is meant to be a structural component. Of course
the doubled ply is really strong by itself - even without the foam!
A great asset of the design is it's 6" draft and low momemntum which
means it will pass right over most obstructions or just bounce off
with nary more than a scratch. All blows will be glancing with the
exception of the bottom and chimes and these are easily reinforced
with extra glass taping, or even a sacrificial skid.
How about UMHD strakes like Bruce used on Rose?
Perhaps Bruce can share with us how these were attached?
I am really curious about the slot closure system. Can you elaborate
on that?
Happy 2005, Nels
> This is an interesting question. I have given it some thought, andplan to
> go with Bolger's design of 1/4" and 1/8" (actually 3 mm) outer andinner,
> along with 1 inch foam. Let me put down my understanding ofcomposite
> walls, and see if I have it close to right (I would also like torun this
> past David Lipsey and understand his choices).Hi Bob,
>
I would just like to say that all you spoke of is probably correct
and I know David would agree. His decisions were based on available
materials and limited resources and he is in no way endorsing them
for others. He estimates that the boat will be about 40 lb heavier
and have 25% less floatation in the hull. Of course BWI has no hull
floatation except in the ends so that can be easily made up for. And
the end weight will also depend on how much glass is added. If I was
to use 3/8" MDO I would only glass below the waterline. If I used
1/4" I would glass the entire exterior. The weight would probably end
up the same. Of course it also depends on what kind of plywood one
uses.
3/4' foam and 1X lumber (which is only 3/4" thick) are both far
cheaper than the 1" thickness items. David bought his at Home Despot.
I am not certain if the hull is a TRUE ply/foam/ply sandwich
construction as the foam is not laminated to the plywood. Or is it? I
am not sure if it is meant to be a structural component. Of course
the doubled ply is really strong by itself - even without the foam!
A great asset of the design is it's 6" draft and low momemntum which
means it will pass right over most obstructions or just bounce off
with nary more than a scratch. All blows will be glancing with the
exception of the bottom and chimes and these are easily reinforced
with extra glass taping, or even a sacrificial skid.
How about UMHD strakes like Bruce used on Rose?
Perhaps Bruce can share with us how these were attached?
I am really curious about the slot closure system. Can you elaborate
on that?
Happy 2005, Nels
--- In
<http://groups.yahoo.com/group/bolger/message//group/bolger/post?postID=r6zJpKzH9fTObSDbSfOpuPHJO4DWtXGEyYpkGGno3lSIVLWR8ShNO6ScJw-6M5AlIT8KmpC-Be9DS6M56LSSqTk>bolger@yahoogroups.com,
"Nels"
<<http://groups.yahoo.com/group/bolger/message//group/bolger/post?postID=9_Go02GuNDvzvgm1ONUd_U0ZEx8HYPaJaNGERdi6_rVYmQ_hvfwMZnOgUix0TOCxFi5-haJ5Vy0XqwA>arvent@h...>
wrote:
reach him. I have the email address that you sent--thanks.
go with Bolger's design of 1/4" and 1/8" (actually 3 mm) outer and inner,
along with 1 inch foam. Let me put down my understanding of composite
walls, and see if I have it close to right (I would also like to run this
past David Lipsey and understand his choices).
When the side is hit by water, the outer wall will want to bend in. As this
happens, the inner wall comes under tension, where it is strong. This inner
wall is important in preventing inward deflection.
The outer wall also plays a role in that it does have strength in
compression. If both walls are increased in thickness by 1.5, the strength
of the boat side is also increase by 1.5.
The overall resistance to bending of the side is strongly dependent on the
foam thickness, going as the square of this. So 1" foam produces a wall
approaching twice the strength of 3/4". This assumes the inner wall won't
fail in tension, which would be interesting to study!
Thus, the Bolger construction would be stronger by 4/3 squared times 1/1.5
or about 18 percent.
This also assumes that the foam does not fail by being squished. I think
this may be a reasonable assumption. The foam is not resistant to a sharp
object, but if the load is distributed over a large area, as the walls tend
to do, it becomes difficult to compress.
In fact, the whole side, especially with the 1/4" outer wall, can be
destroyed by a concentrated load, like an errant log. Part of the defense
is the sharpie shape and the hope of taking this impact almost all edgewise
on the bottom. Or avoiding the log!
The other side of the equation is weight, and the BW concept wants to
concentrate the weight in the bottom and the movable objects like
people. The lighter the sides, the better. This pushes for thin walls, as
does the cost of wood.
Are there any composite structure designers to keep this straight? I'm an
amateur at this stuff, with a couple of old books.
And Happy 2005 to All!
Bob
<http://groups.yahoo.com/group/bolger/message//group/bolger/post?postID=r6zJpKzH9fTObSDbSfOpuPHJO4DWtXGEyYpkGGno3lSIVLWR8ShNO6ScJw-6M5AlIT8KmpC-Be9DS6M56LSSqTk>bolger@yahoogroups.com,
"Nels"
<<http://groups.yahoo.com/group/bolger/message//group/bolger/post?postID=9_Go02GuNDvzvgm1ONUd_U0ZEx8HYPaJaNGERdi6_rVYmQ_hvfwMZnOgUix0TOCxFi5-haJ5Vy0XqwA>arvent@h...>
wrote:
>Good for you! You have made a great choice. There is one being builtThanks Nels for the lead. I will report back about his progress, assuming I
>in TN I believe.
>
>The fellow's name is David Lipsey. I will forward his e-mail to you
>off-list and I am certain he would love to hear from you. He sounds
>like a real pirate as he has at least two other boats in various
>stages of completion.
reach him. I have the email address that you sent--thanks.
>This is an interesting question. I have given it some thought, and plan to
>I believe he has changed the scantlings somewhat because of the
>available materials. He is using 3/8" for the outer layer, 3/4"
>longitudinals and foam thickness and 1/4" linings. That sounds
>excellent to me actually.
>
go with Bolger's design of 1/4" and 1/8" (actually 3 mm) outer and inner,
along with 1 inch foam. Let me put down my understanding of composite
walls, and see if I have it close to right (I would also like to run this
past David Lipsey and understand his choices).
When the side is hit by water, the outer wall will want to bend in. As this
happens, the inner wall comes under tension, where it is strong. This inner
wall is important in preventing inward deflection.
The outer wall also plays a role in that it does have strength in
compression. If both walls are increased in thickness by 1.5, the strength
of the boat side is also increase by 1.5.
The overall resistance to bending of the side is strongly dependent on the
foam thickness, going as the square of this. So 1" foam produces a wall
approaching twice the strength of 3/4". This assumes the inner wall won't
fail in tension, which would be interesting to study!
Thus, the Bolger construction would be stronger by 4/3 squared times 1/1.5
or about 18 percent.
This also assumes that the foam does not fail by being squished. I think
this may be a reasonable assumption. The foam is not resistant to a sharp
object, but if the load is distributed over a large area, as the walls tend
to do, it becomes difficult to compress.
In fact, the whole side, especially with the 1/4" outer wall, can be
destroyed by a concentrated load, like an errant log. Part of the defense
is the sharpie shape and the hope of taking this impact almost all edgewise
on the bottom. Or avoiding the log!
The other side of the equation is weight, and the BW concept wants to
concentrate the weight in the bottom and the movable objects like
people. The lighter the sides, the better. This pushes for thin walls, as
does the cost of wood.
Are there any composite structure designers to keep this straight? I'm an
amateur at this stuff, with a couple of old books.
And Happy 2005 to All!
Bob
--- Inbolger@yahoogroups.com, Bob Larkin <boblark@p...> wrote:
Good for you! You have made a great choice. There is one being built
in TN I believe.
The fellow's name is David Lipsey. I will forward his e-mail to you
off-list and I am certain he would love to hear from you. He sounds
like a real pirate as he has at least two other boats in various
stages of completion.
I believe he has changed the scantlings somewhat because of the
available materials. He is using 3/8" for the outer layer, 3/4"
longitudinals and foam thickness and 1/4" linings. That sounds
excellent to me actually.
Tell him I referred you to him, and then update us on his building
status. He is hoping to launch soon from what I last heard.
Happy New Year, Nels
> I have 21 sheets of various kinds of plywood, plus misc. wood onits way to
> me. I think that means I've started the BW-2!Hi Bob,
Good for you! You have made a great choice. There is one being built
in TN I believe.
The fellow's name is David Lipsey. I will forward his e-mail to you
off-list and I am certain he would love to hear from you. He sounds
like a real pirate as he has at least two other boats in various
stages of completion.
I believe he has changed the scantlings somewhat because of the
available materials. He is using 3/8" for the outer layer, 3/4"
longitudinals and foam thickness and 1/4" linings. That sounds
excellent to me actually.
Tell him I referred you to him, and then update us on his building
status. He is hoping to launch soon from what I last heard.
Happy New Year, Nels
>
> From: "David Thomasson" <David.Thomasson@...>
> Date: 2004/11/29 Mon AM 09:15:02 EST
> To: <saillips@...>
I'm about to take the plunge to build the Amhearst Galley with is a longer version of the Birdwatcher for 8 rowers. Good luck with yours. I hope I'm not getting in over my head.
Jim Clements
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__________________________________________________________________
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I have 21 sheets of various kinds of plywood, plus misc. wood on its way to
me. I think that means I've started the BW-2! I'm in Western Oregon and
will do the major assembly in my driveway. My basement has the woodworking
tools now, but no really long space. This means I need to try to have
frames and other smaller assemblies ready when the weather warms up a
bit. Time will tell how this goes!
Is anyone else building a BW or BW-2? I'd enjoy sharing experiences with
others. I'm also sure I will need to call upon the collected wisdom of
this group from time to time!!
Bob Larkin
Corvallis, OR
me. I think that means I've started the BW-2! I'm in Western Oregon and
will do the major assembly in my driveway. My basement has the woodworking
tools now, but no really long space. This means I need to try to have
frames and other smaller assemblies ready when the weather warms up a
bit. Time will tell how this goes!
Is anyone else building a BW or BW-2? I'd enjoy sharing experiences with
others. I'm also sure I will need to call upon the collected wisdom of
this group from time to time!!
Bob Larkin
Corvallis, OR