Re: [bolger] Pounding in the chop.
>Steve, I have a Featherwind I sail on similarly choppyHeel the boat some. so the chine presents more of a V-edge to the wave.
>conditions on Delaware Bay.
Sail more off the wind if possible so you ride wave faces more diagonally.
More to the point than having a flat bottom, a light boat will be stopped
when driven into oncoming waves.
Also, the amount of pounding will have something to do with the wavelength
of the chop vs the length of the boat, and short boats suffer more from
this than longer boats. Not much can be done about that <chuckle>, but
conditions on the Chesapeake are often choppy as the dickens and I've never
had a serios problem with varios flat-bottom boats with relatively thin
plywood. It can be wet, though!
--
Craig O'Donnell
Sinepuxent Ancestors & Boats
<http://freepages.genealogy.rootsweb.com/~fassitt/>
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_________________________________
-- Professor of Boatology -- Junkomologist
-- Macintosh kinda guy
Friend of Wanda the Wonder Cat, 1991-1997.
_________________________________
>If theThat ain't marine ply, that's lauan underlayment or a close cousin. I've
>plywood you used is like what I used, ie a thick inner layer and paper thin
>outer plies (more like door skin than good marine ply) I'd strongly
>encourage a layer of fibreglass on the bottom, either outside or inside.
never seen marine ply of this sort. I haven't seen every possible style of
marine ply but I've seen domestic fir, sapele and okoume in many
thicknesses and samples of a whole lot more.
--
Craig O'Donnell
Sinepuxent Ancestors & Boats
<http://freepages.genealogy.rootsweb.com/~fassitt/>
The Proa FAQ <http://boat-links.com/proafaq.html>
The Cheap Pages <http://www.friend.ly.net/~dadadata/>
Sailing Canoes, Polytarp Sails, Bamboo, Chinese Junks,
American Proas, the Bolger Boat Honor Roll,
Plywood Boats, Bamboo Rafts, &c.
_________________________________
-- Professor of Boatology -- Junkomologist
-- Macintosh kinda guy
Friend of Wanda the Wonder Cat, 1991-1997.
_________________________________
I built a June Bug approx. 5 years ago out of some pretty low grade marine
ply. 6 mm was as close as I could get to the 1/4" the plans called for. But
more troubling than it's thiness was the fact that the stuff was brittle!
Several pieces actually broke in my hands while I was working with it. For
peace of mind I made the bottom out of 9mm instead. Like almost all
sharpies, June Bug pounds violently to windward in a chop. Beating to
windward is a very appropriate term for sharpies. After five seasons of
sailing she's still going strong. However, I did beef up the sides a bit
around the mast partner, which also has improved my peace of mind. If the
plywood you used is like what I used, ie a thick inner layer and paper thin
outer plies (more like door skin than good marine ply) I'd strongly
encourage a layer of fibreglass on the bottom, either outside or inside.
Either application with increase stiffness and strength. Feather Wind is
longer and wider than JB, so pounding stesses will be that much greater.
Happy sailing.
jeb
ply. 6 mm was as close as I could get to the 1/4" the plans called for. But
more troubling than it's thiness was the fact that the stuff was brittle!
Several pieces actually broke in my hands while I was working with it. For
peace of mind I made the bottom out of 9mm instead. Like almost all
sharpies, June Bug pounds violently to windward in a chop. Beating to
windward is a very appropriate term for sharpies. After five seasons of
sailing she's still going strong. However, I did beef up the sides a bit
around the mast partner, which also has improved my peace of mind. If the
plywood you used is like what I used, ie a thick inner layer and paper thin
outer plies (more like door skin than good marine ply) I'd strongly
encourage a layer of fibreglass on the bottom, either outside or inside.
Either application with increase stiffness and strength. Feather Wind is
longer and wider than JB, so pounding stesses will be that much greater.
Happy sailing.
jeb
It is often suggested that if your sharpie isn't healing enough to
present a V bottom to the seas you sit on the lee side. I have tried
this and it works. I helped a friend build a Carnell $200,
featherwind lookalike. Milt
--- Inbolger@yahoogroups.com, Steve Henshall <steve_henshall@y...>
wrote:
present a V bottom to the seas you sit on the lee side. I have tried
this and it works. I helped a friend build a Carnell $200,
featherwind lookalike. Milt
--- Inbolger@yahoogroups.com, Steve Henshall <steve_henshall@y...>
wrote:
> I know, I know!! Subject line sounds like "how to
> tenderize pork" or the title of the latest song sung
> to the tune of "Bringin in the Sheaves".
>
> Well anyway;
> Took Sea Angel, my Featherwind, out for the third
> time yesterday and we got offshore a bit. Waves were
> about 1.5 feet and she really pounds while beating to
> windward. Even got a bit of spray over the bow and
> for this boat I understand that this is unusual. As I
> watched the bottom of the boat in the bow I see she
> vibrates and moves up and down slightly when the bow
> hits the water. I'm not a very good sailor anymore
> since I've been away from sailing too long. This is
> the first real "flat bottom" boat I've sailed. I'm a
> bit concerned that the cheap 1/4 inch marine ply they
> have here in the Philippines may not be strong enough
> to take this treatment. I plan on sailing in
> conditions that are safe for the boat but would like
> some comments from any of you sharpie sailors out
> there. Should the bottom be totally solid under these
> conditions or is a bit of flex usual? I have
> currently no built in flotation but I'm seriously
> considering adding a watertight complartment to the
> bow and stern. The hull is coated with two part epoxy
> but no glass cloth was used as I went with local
> construction methods while building. The new Michalak
> weighted rudder works like a charm and she points very
> well. I'd say inside 95 degrees or so while tacking.
> I'll take the GPS out with me next time and see just
> how well she tacks. Edna is used to the canoe type
> pump boats they use here and the pounding got her a
> bit nervous. She also didn't like it when we heeled
> over a bit but I explained that that is how most
> sailboats are designed to move through the water.
> Though for the most part the Featherwind is a fairly
> flat sailing skiff.
>
> Any comments welcome.
> Mabuhay from the sunny, warm and windy Philippines,
> Steve.
On Fri, 6 Feb 2004 12:39:45 -0800 (PST), Steve Henshall
<steve_henshall@...> wrote:
the matter. The boat I am building this year specs a 1/2" plywood bottom,
sheathed in 10oz glass, and that's a lake-only pocket cruiser...
Later,
Jon
--------------------------------------------------------------
Jon HylandsJon@...http://www.huv.com/jon
Project: Micro Seeker (Micro Autonomous Underwater Vehicle)
http://www.huv.com
<steve_henshall@...> wrote:
> I'm a...
> bit concerned that the cheap 1/4 inch marine ply they
> have here in the Philippines may not be strong enough
> to take this treatment.
> The hull is coated with two part epoxyWow... Seems a little light to me, although I have no real experience in
> but no glass cloth was used as I went with local
> construction methods while building.
the matter. The boat I am building this year specs a 1/2" plywood bottom,
sheathed in 10oz glass, and that's a lake-only pocket cruiser...
Later,
Jon
--------------------------------------------------------------
Jon HylandsJon@...http://www.huv.com/jon
Project: Micro Seeker (Micro Autonomous Underwater Vehicle)
http://www.huv.com
Steve, I have a Featherwind I sail on similarly choppy
conditions on Delaware Bay. The bottom does lots of
oil canning; it almost looks alive pumping in and out,
but it does not seem any the worse for wear
afterwards. Sam
Well anyway;
Do you Yahoo!?
Yahoo! Finance: Get your refund fast by filing online.
http://taxes.yahoo.com/filing.html
conditions on Delaware Bay. The bottom does lots of
oil canning; it almost looks alive pumping in and out,
but it does not seem any the worse for wear
afterwards. Sam
Well anyway;
> Took Sea Angel, my Featherwind, out for the third__________________________________
> time yesterday and we got offshore a bit. Waves
> were
> about 1.5 feet and she really pounds while beating
> to
> windward. Even got a bit of spray over the bow and
> for this boat I understand that this is unusual. As
> I
> watched the bottom of the boat in the bow I see she
> vibrates and moves up and down slightly when the bow
> hits the water. I plan on sailing in
> conditions that are safe for the boat but would like
> some comments from any of you sharpie sailors out
> there. Should the bottom be totally solid under
> these
> conditions or is a bit of flex usual?
Do you Yahoo!?
Yahoo! Finance: Get your refund fast by filing online.
http://taxes.yahoo.com/filing.html
I know, I know!! Subject line sounds like "how to
tenderize pork" or the title of the latest song sung
to the tune of "Bringin in the Sheaves".
Well anyway;
Took Sea Angel, my Featherwind, out for the third
time yesterday and we got offshore a bit. Waves were
about 1.5 feet and she really pounds while beating to
windward. Even got a bit of spray over the bow and
for this boat I understand that this is unusual. As I
watched the bottom of the boat in the bow I see she
vibrates and moves up and down slightly when the bow
hits the water. I'm not a very good sailor anymore
since I've been away from sailing too long. This is
the first real "flat bottom" boat I've sailed. I'm a
bit concerned that the cheap 1/4 inch marine ply they
have here in the Philippines may not be strong enough
to take this treatment. I plan on sailing in
conditions that are safe for the boat but would like
some comments from any of you sharpie sailors out
there. Should the bottom be totally solid under these
conditions or is a bit of flex usual? I have
currently no built in flotation but I'm seriously
considering adding a watertight complartment to the
bow and stern. The hull is coated with two part epoxy
but no glass cloth was used as I went with local
construction methods while building. The new Michalak
weighted rudder works like a charm and she points very
well. I'd say inside 95 degrees or so while tacking.
I'll take the GPS out with me next time and see just
how well she tacks. Edna is used to the canoe type
pump boats they use here and the pounding got her a
bit nervous. She also didn't like it when we heeled
over a bit but I explained that that is how most
sailboats are designed to move through the water.
Though for the most part the Featherwind is a fairly
flat sailing skiff.
Any comments welcome.
Mabuhay from the sunny, warm and windy Philippines,
Steve.
tenderize pork" or the title of the latest song sung
to the tune of "Bringin in the Sheaves".
Well anyway;
Took Sea Angel, my Featherwind, out for the third
time yesterday and we got offshore a bit. Waves were
about 1.5 feet and she really pounds while beating to
windward. Even got a bit of spray over the bow and
for this boat I understand that this is unusual. As I
watched the bottom of the boat in the bow I see she
vibrates and moves up and down slightly when the bow
hits the water. I'm not a very good sailor anymore
since I've been away from sailing too long. This is
the first real "flat bottom" boat I've sailed. I'm a
bit concerned that the cheap 1/4 inch marine ply they
have here in the Philippines may not be strong enough
to take this treatment. I plan on sailing in
conditions that are safe for the boat but would like
some comments from any of you sharpie sailors out
there. Should the bottom be totally solid under these
conditions or is a bit of flex usual? I have
currently no built in flotation but I'm seriously
considering adding a watertight complartment to the
bow and stern. The hull is coated with two part epoxy
but no glass cloth was used as I went with local
construction methods while building. The new Michalak
weighted rudder works like a charm and she points very
well. I'd say inside 95 degrees or so while tacking.
I'll take the GPS out with me next time and see just
how well she tacks. Edna is used to the canoe type
pump boats they use here and the pounding got her a
bit nervous. She also didn't like it when we heeled
over a bit but I explained that that is how most
sailboats are designed to move through the water.
Though for the most part the Featherwind is a fairly
flat sailing skiff.
Any comments welcome.
Mabuhay from the sunny, warm and windy Philippines,
Steve.