Re: [bolger] diesel launch
Sorry to be so lomg getting back but if you don't find anything by PCB,
you probably ought to look at "selway-fisher.com" or I think he's on
duckworks also. Paul Fisher has some great design for steam or small
diesel. Clyde
bhilpholger wrote:
you probably ought to look at "selway-fisher.com" or I think he's on
duckworks also. Paul Fisher has some great design for steam or small
diesel. Clyde
bhilpholger wrote:
> Hey, all - I just had the pleasure of spending two hours alone in a[Non-text portions of this message have been removed]
> Pulsifer Hampton on a beautiful lake in Northern MN. As I think all
> of you know, it is a heavy (2,200 lb) wooden diesel launch, handmade
> by Dick Pulsifer. Does anyone know if Bolger has drawn anything
> similar, perhaps in a cold-molded version that would be easier to
> build and wouldn't take to much maintenance? Dan
>
>
In response to my post on this topic, someone sent me a personal
email. I've replied twice but both replies bounced. As far as I know
no-one has built to this design. I think Boats with an Open Mind is
still in print, and a good library should be able to make available a
copy of the book.
Howard
--- Inbolger@yahoogroups.com, "Howard Stephenson"
<howardstephenson@...> wrote:
email. I've replied twice but both replies bounced. As far as I know
no-one has built to this design. I think Boats with an Open Mind is
still in print, and a good library should be able to make available a
copy of the book.
Howard
--- Inbolger@yahoogroups.com, "Howard Stephenson"
<howardstephenson@...> wrote:
>
> Another possibility from Boats with an Open Mind is Plywood Diesel
> Cruiser, 23'6" x 7'5", about 3,000 lb displacement.
Yesterday I was helping a good friend move some stuff back down to his boat and I happened to see a Microtrawler tied up on a dock not to far away. Rich and I took the time to take a look at it. Rich had never seen one and it was the third one I had seen in real life. By chance is the owner here on the list?
Blessings all Kriss
[Non-text portions of this message have been removed]
Blessings all Kriss
[Non-text portions of this message have been removed]
Another possibility from Boats with an Open Mind is Plywood Diesel
Cruiser, 23'6" x 7'5", about 3,000 lb displacement. Two problems here:
plywood and cruiser. Being plywood would not be too apparent afloat,
since the chine is under water aft and quite low forward. Converting
the design into a launch would be easy enough. The freeboard is maybe
a little too high for a launch, but that would be easy to fix, and you
could have a nice lively sheerline at the same time. I've always
thought the superstructure looked a little clumsy on this design
anyway.
A third posssible problem is the transom-hung wooden rudder that to
some would not appear very elegant.
Specified power is a Yanmar 2GM20F. Details of this engine at:
http://www.marine-power.co.uk/2gm20f%20specs.htm
I don't know if one was ever built, but it appears to be a complete
design, reproduced offset and all in the book.
Howard
Cruiser, 23'6" x 7'5", about 3,000 lb displacement. Two problems here:
plywood and cruiser. Being plywood would not be too apparent afloat,
since the chine is under water aft and quite low forward. Converting
the design into a launch would be easy enough. The freeboard is maybe
a little too high for a launch, but that would be easy to fix, and you
could have a nice lively sheerline at the same time. I've always
thought the superstructure looked a little clumsy on this design
anyway.
A third posssible problem is the transom-hung wooden rudder that to
some would not appear very elegant.
Specified power is a Yanmar 2GM20F. Details of this engine at:
http://www.marine-power.co.uk/2gm20f%20specs.htm
I don't know if one was ever built, but it appears to be a complete
design, reproduced offset and all in the book.
Howard
Sam,
Which boat are you speaking of in BWOM? The Boy's Launch?
Don
Which boat are you speaking of in BWOM? The Boy's Launch?
Don
--- Inbolger@yahoogroups.com, Sam Glasscock <glasscocklanding@...> wrote:
>
> Has anyone built the diesel launch, from Boats with
> an Open Mind? It is a pretty little plywood inboard
> diesel cruiser. I am interested if any have been
> built and what kind of performance they got with the
> little diesel called for in the specs. Thanks. Sam
>
IMO the designs available to homebuilders most like the Pulsifer are
old Atkins.
http://www.boat-links.com/Atkinco/
You might also check Payson's Instant Boats, Downeast Dories section
and find what you are looking for there.
http://www.instantboats.com/downeastdories/dories.php
Some are Atkin, some are Bolger.
old Atkins.
http://www.boat-links.com/Atkinco/
You might also check Payson's Instant Boats, Downeast Dories section
and find what you are looking for there.
http://www.instantboats.com/downeastdories/dories.php
Some are Atkin, some are Bolger.
--- Inbolger@yahoogroups.com, "Bruce Hallman" <bruce@...> wrote:
>
> On Fri, Jun 20, 2008 at 9:00 AM, bhilpholger <dwknoedler@...> wrote:
> > Hey, all - I just had the pleasure of spending two hours alone in a
> > Pulsifer Hampton on a beautiful lake in Northern MN. As I think all
> > of you know, it is a heavy (2,200 lb) wooden diesel launch, handmade
> > by Dick Pulsifer. Does anyone know if Bolger has drawn anything
> > similar, perhaps in a cold-molded version that would be easier to
> > build and wouldn't take to much maintenance? Dan
>
> I'd be mounting a quiet, economical four-stroke on the transom.I'm dreaming of putting a old style low RPM one cylinder 6 hp diesel
>
> Howard
(wvo) motor inboard like this,
http://www.listeroid.com/engines.html
Also in Boats with an Open Mind is the outboard-powered "Fisherman's
Launch", a Shivaree stretched to 21'4" x 7'.
In the article Bolger acknowledges the similarity with the Pulsifer
boats. He's designed it for carvel construction, but there's a photo
of one built cold-moulded. If I recall correctly this same boat was
featured in a story in WoodenBoat a dozen or so years ago.
This design is light enough and has the right lines for it to plane.
Bolger reckoned it would do about 30 mph with 50 hp. Modifying the
design for inboard power would be quite a task, but if it were mine,
I'd be mounting a quiet, economical four-stroke on the transom.
Howard
Launch", a Shivaree stretched to 21'4" x 7'.
In the article Bolger acknowledges the similarity with the Pulsifer
boats. He's designed it for carvel construction, but there's a photo
of one built cold-moulded. If I recall correctly this same boat was
featured in a story in WoodenBoat a dozen or so years ago.
This design is light enough and has the right lines for it to plane.
Bolger reckoned it would do about 30 mph with 50 hp. Modifying the
design for inboard power would be quite a task, but if it were mine,
I'd be mounting a quiet, economical four-stroke on the transom.
Howard
--- Inbolger@yahoogroups.com, "Bruce Hallman" <bruce@...> wrote:
> The other Bolger boat that seems similar is their 'Shivaree', which
> comes in various lengths up to 21'4".
On Fri, Jun 20, 2008 at 9:00 AM, bhilpholger <dwknoedler@...> wrote:
fine lined open hull 22 footer.
Phil Bolger has designed many 'lobster boats' which I am guessing
would be similar in hull shape. I would guess that over the years,
ten or twenty of them in various sizes. One of the better known is
'Merlin' (aka 'Marina Cruiser'), 2T3" x7'10", found in his book 'Boats
with an open mind', but there are many others.
(Merlin has a cuddy cabin, and topsides, but could be built as an open
boat) see here:
http://www.flickr.com/photos/hallman/2312709201/
The other Bolger boat that seems similar is their 'Shivaree', which
comes in various lengths up to 21'4".
See the Shivaree 18 footer here:
http://www.flickr.com/photos/hallman/2536863980/
> Hey, all - I just had the pleasure of spending two hours alone in aI am not familiar with your boat, but Googling it, I see that it is a
> Pulsifer Hampton on a beautiful lake in Northern MN. As I think all
> of you know, it is a heavy (2,200 lb) wooden diesel launch, handmade
> by Dick Pulsifer. Does anyone know if Bolger has drawn anything
> similar, perhaps in a cold-molded version that would be easier to
> build and wouldn't take to much maintenance? Dan
fine lined open hull 22 footer.
Phil Bolger has designed many 'lobster boats' which I am guessing
would be similar in hull shape. I would guess that over the years,
ten or twenty of them in various sizes. One of the better known is
'Merlin' (aka 'Marina Cruiser'), 2T3" x7'10", found in his book 'Boats
with an open mind', but there are many others.
(Merlin has a cuddy cabin, and topsides, but could be built as an open
boat) see here:
http://www.flickr.com/photos/hallman/2312709201/
The other Bolger boat that seems similar is their 'Shivaree', which
comes in various lengths up to 21'4".
See the Shivaree 18 footer here:
http://www.flickr.com/photos/hallman/2536863980/
Hey, all - I just had the pleasure of spending two hours alone in a
Pulsifer Hampton on a beautiful lake in Northern MN. As I think all
of you know, it is a heavy (2,200 lb) wooden diesel launch, handmade
by Dick Pulsifer. Does anyone know if Bolger has drawn anything
similar, perhaps in a cold-molded version that would be easier to
build and wouldn't take to much maintenance? Dan
Pulsifer Hampton on a beautiful lake in Northern MN. As I think all
of you know, it is a heavy (2,200 lb) wooden diesel launch, handmade
by Dick Pulsifer. Does anyone know if Bolger has drawn anything
similar, perhaps in a cold-molded version that would be easier to
build and wouldn't take to much maintenance? Dan
Hi Doug,
beers and ski into trees. I think the density is something like 87% of
MSL or so at the elevation of the lake, depending on temperature and
pressure. The force of aerodynamic lift that makes a sailboat go, just
like an airplane, is directly proportional to air density and sail
area, but is proportional to the square of the velocity over the
airfoil (the sail in this case). At this particular lake, it's
possible to get a whole lot of v**2 without warning, and we don't miss
the density loss when that happens.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
> I would think that at 8800' elevation, you would be looking forThat's one reason people who vacation out here get plastered on two
> over-canvased designs by sea level standards. The lower air density
> that far up should reduce drive noticeably. I think air density is
> down to 75% of sea level values at 10,000 feet.
beers and ski into trees. I think the density is something like 87% of
MSL or so at the elevation of the lake, depending on temperature and
pressure. The force of aerodynamic lift that makes a sailboat go, just
like an airplane, is directly proportional to air density and sail
area, but is proportional to the square of the velocity over the
airfoil (the sail in this case). At this particular lake, it's
possible to get a whole lot of v**2 without warning, and we don't miss
the density loss when that happens.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
--- Inbolger@yahoogroups.com, "adventures_in_astrophotography"
<jon@...> wrote:
over-canvased designs by sea level standards. The lower air density
that far up should reduce drive noticeably. I think air density is
down to 75% of sea level values at 10,000 feet.
Doug.
<jon@...> wrote:
>I would think that at 8800' elevation, you would be looking for
>
> I try very hard to stay dry in the lake we sail at. It's at 8800'
>
>
> Jon Kolb
> www.kolbsadventures.com/boatbuilding_index.htm
>
over-canvased designs by sea level standards. The lower air density
that far up should reduce drive noticeably. I think air density is
down to 75% of sea level values at 10,000 feet.
Doug.
Hi Bruce,
constructed and ballasted, so I'm sure it will have much different
feel.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
> Looks heck-of-fun! Sort of the same size as a Zephyr I am guessing.I hope so! It's about 10" wider than a Zephyr, and more heavily
constructed and ballasted, so I'm sure it will have much different
feel.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
Looks heck-of-fun! Sort of the same size as a Zephyr I am guessing.
This question came up a year or two ago, and as I recall someone sent a
fax to Phil Bolger & Friends & got a response along the lines of, "not
that anyone has contacted us about".
--Gabriel
Sam Glasscock wrote:
fax to Phil Bolger & Friends & got a response along the lines of, "not
that anyone has contacted us about".
--Gabriel
Sam Glasscock wrote:
>[Non-text portions of this message have been removed]
> Has anyone built the diesel launch, from Boats with
> an Open Mind? It is a pretty little plywood inboard
> diesel cruiser. I am interested if any have been
> built and what kind of performance they got with the
> little diesel called for in the specs. Thanks. Sam
>
> __________________________________________________________
> Never miss a thing. Make Yahoo your home page.
>http://www.yahoo.com/r/hs<http://www.yahoo.com/r/hs>
>
>
Has anyone built the diesel launch, from Boats with
an Open Mind? It is a pretty little plywood inboard
diesel cruiser. I am interested if any have been
built and what kind of performance they got with the
little diesel called for in the specs. Thanks. Sam
____________________________________________________________________________________
Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs
an Open Mind? It is a pretty little plywood inboard
diesel cruiser. I am interested if any have been
built and what kind of performance they got with the
little diesel called for in the specs. Thanks. Sam
____________________________________________________________________________________
Never miss a thing. Make Yahoo your home page.
http://www.yahoo.com/r/hs
Hi Graeme,
I thought about using Canard as well, but didn't primarily because
it has too much internal structure that wouldn't be needed if not
using the bow+stern rudder arrangement.
Since I only scaled up the length and not the beam, the displacement
should increase by the square of the scale, not the cube.
Nevertheless, I expect it to be a more relaxed sailing experience
than a normal Windsprint, even though I've never sailed one. The
increased freeboard of about 4" should help, too, and I'm really
looking forward to having a nice backrest for a change, especially
when drifting.
The two cockpits are each about 5' long, but legroom gets pretty
short as you move further forward or aft in the slender hull, so
it's assumed that the crew rides forward. The thwart is shaped
partly for looks and partly to provide a bit more hip room for
whoever is in the forward cockpit.
In the photo I posted, the camera distorts the relative length of
the two cockpits somewhat - the forward end of the thwart (and
daggerboard trunk) is equidistant from the fore and aft
perpendiculars. BTW, this puts the center of area of the
daggerboard at about 10'-10" aft of the forward perpendicular.
The dog can probably ride in the aft cockpit with the helmsman, but
he'll have to duck the tiller if he's not laying down. If he is
laying down, he tends to consume whatever space is available with
remarkable efficiency. The dog is expected to ride forward as well.
My plan is to use the space at the aft end of the aft cockpit for a
cooler. Tent, bags, and other camping gear go in the fore and aft
holds, and two 2.5 gallon water jugs will sit on the bottom against
the midships bulkhead on either side of the daggerboard trunk. When
it's there, the water should hopefully add further to the righting
moment.
and downhaul in a hurry. At first I thought about running the
halyard along the bottom and through the midships bulkhead to a
cleat on the aft side of that bulkhead, but didn't wind up building
it that way. I figure I can still do that later if it seems
desireable.
I suspect that the actual righting moment of the daggerboard ballast
is more like 50 ft lbs, but it's definitely going to help. If she
winds up tender under full sail, I can always make another
daggerboard a foot longer and/or with more ballast - or scarf more
length on top of this one. Either won't cost more than some
leftover plywood and another bag of shot (although that stuff is
very expensive lately).
I try very hard to stay dry in the lake we sail at. It's at 8800'
and after you get more than 6" deep in it, you realize that it's
very cold water. Having the watertight volume in the ends of the
boat should help in righting it if we ever go over.
decided that it was going to need a dedicated trailer, which I
really didn't want to buy or build. I also started tinkering with
the lofting, thinking I could design a motor mount and shallow fixed
rudder, and eventually just got worried that I was too far afield of
the original design and might waste a lot of time and materials if I
didn't think it through further. So, rather than fret about it, I
stacked up the bulkheads and moved on - for now, at least.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
> Great idea Jon, and what a beaut looking boat! I've sometimesthought
> about the CANARD hull "Windsprinted", but I think it would be morecamping.
> cramped than your arrangements, especially for more than solo
I thought about using Canard as well, but didn't primarily because
it has too much internal structure that wouldn't be needed if not
using the bow+stern rudder arrangement.
> (1.25)^2 = a stability increase proportional to length^2 = ~1.5and
> (1.25)^3 = a displacement increase proportional to length^3 = ~2
>
> WindSprint weight at 150lbs + 190lbs crew = 340lbs
> Yours approximately 200lbs + 190lbs crew = 390lbs
> " " " + 380lbs crew = 580lbs
>
> Stability up by 50%; more sedate - also I'm sure the extra weight
> where you've placed it will add to the feeling.I don't think the displacement increases as much as you suggest.
>
> SA/D down by 50% if fully laden; not as fast on the wind.
> Probably faster off the wind due to increased WL with less rocker.
Since I only scaled up the length and not the beam, the displacement
should increase by the square of the scale, not the cube.
Nevertheless, I expect it to be a more relaxed sailing experience
than a normal Windsprint, even though I've never sailed one. The
increased freeboard of about 4" should help, too, and I'm really
looking forward to having a nice backrest for a change, especially
when drifting.
> Must the crew be in the forward cockpit, as in His and HersSchooner?
The two cockpits are each about 5' long, but legroom gets pretty
short as you move further forward or aft in the slender hull, so
it's assumed that the crew rides forward. The thwart is shaped
partly for looks and partly to provide a bit more hip room for
whoever is in the forward cockpit.
In the photo I posted, the camera distorts the relative length of
the two cockpits somewhat - the forward end of the thwart (and
daggerboard trunk) is equidistant from the fore and aft
perpendiculars. BTW, this puts the center of area of the
daggerboard at about 10'-10" aft of the forward perpendicular.
The dog can probably ride in the aft cockpit with the helmsman, but
he'll have to duck the tiller if he's not laying down. If he is
laying down, he tends to consume whatever space is available with
remarkable efficiency. The dog is expected to ride forward as well.
My plan is to use the space at the aft end of the aft cockpit for a
cooler. Tent, bags, and other camping gear go in the fore and aft
holds, and two 2.5 gallon water jugs will sit on the bottom against
the midships bulkhead on either side of the daggerboard trunk. When
it's there, the water should hopefully add further to the righting
moment.
> If not, perhaps a fabric cover can be stretched across thegunwhales
> back to the centre thwart. This could slow water entry there inthe
> event of a knockdown, and with the daggerboard ballast rightingits
> moment of near 80ftlbs the uncrewed boat may even spring back to
> feet. In fact if you stepped up and over the high side as she layNot a bad idea, but it would make it difficult to get to the halyard
> down, then back again as she righted, this may happen without you
> wetting your own feet much.
and downhaul in a hurry. At first I thought about running the
halyard along the bottom and through the midships bulkhead to a
cleat on the aft side of that bulkhead, but didn't wind up building
it that way. I figure I can still do that later if it seems
desireable.
I suspect that the actual righting moment of the daggerboard ballast
is more like 50 ft lbs, but it's definitely going to help. If she
winds up tender under full sail, I can always make another
daggerboard a foot longer and/or with more ballast - or scarf more
length on top of this one. Either won't cost more than some
leftover plywood and another bag of shot (although that stuff is
very expensive lately).
I try very hard to stay dry in the lake we sail at. It's at 8800'
and after you get more than 6" deep in it, you realize that it's
very cold water. Having the watertight volume in the ends of the
boat should help in righting it if we ever go over.
> You mentioned Cartoon 40 in your post - congrats on the startthere -
> I look forward to hearing more on that boat too when you resume.I lofted it, built all the bulkheads, transom, and stem, and then
decided that it was going to need a dedicated trailer, which I
really didn't want to buy or build. I also started tinkering with
the lofting, thinking I could design a motor mount and shallow fixed
rudder, and eventually just got worried that I was too far afield of
the original design and might waste a lot of time and materials if I
didn't think it through further. So, rather than fret about it, I
stacked up the bulkheads and moved on - for now, at least.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
Hi Sloppy,
plywood, but this is my first experience with it and it's not the
super high quality stuff I had hoped to find. It's only overlayed
on one side, the back has just as many defects as most home-
improvement store plywood, and all I could get was 3/8". There are
no doubt other sources up in Denver, and perhaps I'll eventually
find one. Olympic Panel doesn't seem to list any dealers on their
website.
The shoes were glued down over the fiberglass sheathing using
epoxy. The idea is that if ever needed, they can be cut/ground off
and replaced without compromising the sheathing.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
> It looks beautiful, you have managed toThanks. The MDO doesn't seem to be any heavier that regular fir
> carry the lines over very well.
> How much heavier is the MDO ?
> What did you bed the bilge strips in ?
plywood, but this is my first experience with it and it's not the
super high quality stuff I had hoped to find. It's only overlayed
on one side, the back has just as many defects as most home-
improvement store plywood, and all I could get was 3/8". There are
no doubt other sources up in Denver, and perhaps I'll eventually
find one. Olympic Panel doesn't seem to list any dealers on their
website.
The shoes were glued down over the fiberglass sheathing using
epoxy. The idea is that if ever needed, they can be cut/ground off
and replaced without compromising the sheathing.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
Really nice work, Jon, on all the boats. Thanks for the link. Brian
--- Inbolger@yahoogroups.com, "adventures_in_astrophotography"
<jon@...> wrote:
--- Inbolger@yahoogroups.com, "adventures_in_astrophotography"
<jon@...> wrote:
>
> For the last few months, in between fishing, hunting, hiking, and
> snowshoeing, not to mention heavy work and family commitments, I've
> been tinkering with a stretched version of Windsprint. The Light
> (Cat) Schooner is a bit too much work to rig and sail singlehanded,
> particularly if you just want a quick sail, so I decided to build
> something along the lines of the His and Hers Schooner, but with a
> simpler rig that was quick to set and strike when the afternoon
> storms flare up. I also wanted room for two and our dog when the
> situation warranted. Oar auxilliary is cheap and desirable,
> especially since I've grown so fond of rowing the last couple of
> years.
>
> Daggerboards work on the steep shores of the reservoir we usually
> sail at, so it occured to me that a stretched Windsprint, on the as-
> designed beam, would be good candidate and wouldn't require horsing
> the heavy board of the H&S Schooner around. I also thought a little
> more heft and freeboard wouldn't hurt with such a large sailplan. I
> took the plans from Payson's book, and simply scaled only the side
> panels up to 125%, keeping everything else nominally the same. A few
> more details are described in the link below. The Cartoon 40 effort
> was put on hold for awhile and away I went, albeit slowly due to the
> many other distractions.
>
> I'm not done yet, but it's coming along nicely enough to show, and I
> expect to have her done in plenty of time for the coming season.
> She's a bit heavier than I had hoped, but might still be light enough
> to dolly-launch, with some effort, after hauling her to the lake on a
> utility trailer. Her hull proportions fall somewhere between the
> original Windsprint and BW1, and I think she looks pretty sleek. We
> plan to sit on floorboards, and I've got some provisions for storing
> camping gear planned that should make her more versatile.
>
>http://www.kolbsadventures.com/windsprint_1.htm
>
> Comments, suggestions, and critisim are welcome. I've spotted a
> grammer error already - please let me know of other errata.
>
> Jon Kolb
> www.kolbsadventures.com/boatbuilding_index.htm
>
Great idea Jon, and what a beaut looking boat! I've sometimes thought
about the CANARD hull "Windsprinted", but I think it would be more
cramped than your arrangements, especially for more than solo camping.
(1.25)^2 = a stability increase proportional to length^2 = ~1.5
(1.25)^3 = a displacement increase proportional to length^3 = ~2
WindSprint weight at 150lbs + 190lbs crew = 340lbs
Yours approximately 200lbs + 190lbs crew = 390lbs
" " " + 380lbs crew = 580lbs
Stability up by 50%; more sedate - also I'm sure the extra weight and
where you've placed it will add to the feeling.
SA/D down by 50% if fully laden; not as fast on the wind.
Probably faster off the wind due to increased WL with less rocker.
Must the crew be in the forward cockpit, as in His and Hers Schooner?
If not, perhaps a fabric cover can be stretched across the gunwhales
back to the centre thwart. This could slow water entry there in the
event of a knockdown, and with the daggerboard ballast righting
moment of near 80ftlbs the uncrewed boat may even spring back to its
feet. In fact if you stepped up and over the high side as she lay
down, then back again as she righted, this may happen without you
wetting your own feet much.
You mentioned Cartoon 40 in your post - congrats on the start there -
I look forward to hearing more on that boat too when you resume.
Cheers
Graeme
--- Inbolger@yahoogroups.com, "adventures_in_astrophotography"
<jon@...> wrote:
so it occured to me that a stretched Windsprint, on the as-
about the CANARD hull "Windsprinted", but I think it would be more
cramped than your arrangements, especially for more than solo camping.
(1.25)^2 = a stability increase proportional to length^2 = ~1.5
(1.25)^3 = a displacement increase proportional to length^3 = ~2
WindSprint weight at 150lbs + 190lbs crew = 340lbs
Yours approximately 200lbs + 190lbs crew = 390lbs
" " " + 380lbs crew = 580lbs
Stability up by 50%; more sedate - also I'm sure the extra weight and
where you've placed it will add to the feeling.
SA/D down by 50% if fully laden; not as fast on the wind.
Probably faster off the wind due to increased WL with less rocker.
Must the crew be in the forward cockpit, as in His and Hers Schooner?
If not, perhaps a fabric cover can be stretched across the gunwhales
back to the centre thwart. This could slow water entry there in the
event of a knockdown, and with the daggerboard ballast righting
moment of near 80ftlbs the uncrewed boat may even spring back to its
feet. In fact if you stepped up and over the high side as she lay
down, then back again as she righted, this may happen without you
wetting your own feet much.
You mentioned Cartoon 40 in your post - congrats on the start there -
I look forward to hearing more on that boat too when you resume.
Cheers
Graeme
--- Inbolger@yahoogroups.com, "adventures_in_astrophotography"
<jon@...> wrote:
so it occured to me that a stretched Windsprint, on the as-
> designed beam, would be good candidate and wouldn't require horsinglittle
> the heavy board of the H&S Schooner around. I also thought a
> more heft and freeboard wouldn't hurt with such a large sailplan.I
> took the plans from Payson's book, and simply scaled only the side
> panels up to 125%, keeping everything else nominally the same.
--- Inbolger@yahoogroups.com, "adventures_in_astrophotography"
<jon@...> wrote:
carry the lines over very well.
How much heavier is the MDO ?
What did you bed the bilge strips in ?
Thanks, Sloppy
<jon@...> wrote:
>I've
> For the last few months, in between fishing, hunting, hiking, and
> snowshoeing, not to mention heavy work and family commitments,
> been tinkering with a stretched version of Windsprint. The Lightsinglehanded,
> (Cat) Schooner is a bit too much work to rig and sail
> particularly if you just want a quick sail, so I decided to buildas-
> something along the lines of the His and Hers Schooner, but with a
> simpler rig that was quick to set and strike when the afternoon
> storms flare up. I also wanted room for two and our dog when the
> situation warranted. Oar auxilliary is cheap and desirable,
> especially since I've grown so fond of rowing the last couple of
> years.
>
> Daggerboards work on the steep shores of the reservoir we usually
> sail at, so it occured to me that a stretched Windsprint, on the
> designed beam, would be good candidate and wouldn't requirehorsing
> the heavy board of the H&S Schooner around. I also thought alittle
> more heft and freeboard wouldn't hurt with such a large sailplan.I
> took the plans from Payson's book, and simply scaled only the sidefew
> panels up to 125%, keeping everything else nominally the same. A
> more details are described in the link below. The Cartoon 40effort
> was put on hold for awhile and away I went, albeit slowly due tothe
> many other distractions.I
>
> I'm not done yet, but it's coming along nicely enough to show, and
> expect to have her done in plenty of time for the coming season.enough
> She's a bit heavier than I had hoped, but might still be light
> to dolly-launch, with some effort, after hauling her to the lakeon a
> utility trailer. Her hull proportions fall somewhere between theWe
> original Windsprint and BW1, and I think she looks pretty sleek.
> plan to sit on floorboards, and I've got some provisions forstoring
> camping gear planned that should make her more versatile.It looks beautiful, you have managed to
>
>http://www.kolbsadventures.com/windsprint_1.htm
>
> Comments, suggestions, and critisim are welcome. I've spotted a
> grammer error already - please let me know of other errata.
>
> Jon Kolb
> www.kolbsadventures.com/boatbuilding_index.htm
>
carry the lines over very well.
How much heavier is the MDO ?
What did you bed the bilge strips in ?
Thanks, Sloppy
For the last few months, in between fishing, hunting, hiking, and
snowshoeing, not to mention heavy work and family commitments, I've
been tinkering with a stretched version of Windsprint. The Light
(Cat) Schooner is a bit too much work to rig and sail singlehanded,
particularly if you just want a quick sail, so I decided to build
something along the lines of the His and Hers Schooner, but with a
simpler rig that was quick to set and strike when the afternoon
storms flare up. I also wanted room for two and our dog when the
situation warranted. Oar auxilliary is cheap and desirable,
especially since I've grown so fond of rowing the last couple of
years.
Daggerboards work on the steep shores of the reservoir we usually
sail at, so it occured to me that a stretched Windsprint, on the as-
designed beam, would be good candidate and wouldn't require horsing
the heavy board of the H&S Schooner around. I also thought a little
more heft and freeboard wouldn't hurt with such a large sailplan. I
took the plans from Payson's book, and simply scaled only the side
panels up to 125%, keeping everything else nominally the same. A few
more details are described in the link below. The Cartoon 40 effort
was put on hold for awhile and away I went, albeit slowly due to the
many other distractions.
I'm not done yet, but it's coming along nicely enough to show, and I
expect to have her done in plenty of time for the coming season.
She's a bit heavier than I had hoped, but might still be light enough
to dolly-launch, with some effort, after hauling her to the lake on a
utility trailer. Her hull proportions fall somewhere between the
original Windsprint and BW1, and I think she looks pretty sleek. We
plan to sit on floorboards, and I've got some provisions for storing
camping gear planned that should make her more versatile.
http://www.kolbsadventures.com/windsprint_1.htm
Comments, suggestions, and critisim are welcome. I've spotted a
grammer error already - please let me know of other errata.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm
snowshoeing, not to mention heavy work and family commitments, I've
been tinkering with a stretched version of Windsprint. The Light
(Cat) Schooner is a bit too much work to rig and sail singlehanded,
particularly if you just want a quick sail, so I decided to build
something along the lines of the His and Hers Schooner, but with a
simpler rig that was quick to set and strike when the afternoon
storms flare up. I also wanted room for two and our dog when the
situation warranted. Oar auxilliary is cheap and desirable,
especially since I've grown so fond of rowing the last couple of
years.
Daggerboards work on the steep shores of the reservoir we usually
sail at, so it occured to me that a stretched Windsprint, on the as-
designed beam, would be good candidate and wouldn't require horsing
the heavy board of the H&S Schooner around. I also thought a little
more heft and freeboard wouldn't hurt with such a large sailplan. I
took the plans from Payson's book, and simply scaled only the side
panels up to 125%, keeping everything else nominally the same. A few
more details are described in the link below. The Cartoon 40 effort
was put on hold for awhile and away I went, albeit slowly due to the
many other distractions.
I'm not done yet, but it's coming along nicely enough to show, and I
expect to have her done in plenty of time for the coming season.
She's a bit heavier than I had hoped, but might still be light enough
to dolly-launch, with some effort, after hauling her to the lake on a
utility trailer. Her hull proportions fall somewhere between the
original Windsprint and BW1, and I think she looks pretty sleek. We
plan to sit on floorboards, and I've got some provisions for storing
camping gear planned that should make her more versatile.
http://www.kolbsadventures.com/windsprint_1.htm
Comments, suggestions, and critisim are welcome. I've spotted a
grammer error already - please let me know of other errata.
Jon Kolb
www.kolbsadventures.com/boatbuilding_index.htm