Re: WDJ Mast problem
Hey, hey hey! When are you going to start schooner building? Thanks
for your info. I guess the Gypsy mast is supposed to be bent. The WDJ
masts are probably much stiffer at 5 1/2" diameter on 24' and 22'
length. I don't think the the press of wind alone will force the
curve out of the mast if positioned accordingly. I may be wrong. I
have sent a fax to PB&F, no answer yet.
Launching pics soon to come!
Bjørn
for your info. I guess the Gypsy mast is supposed to be bent. The WDJ
masts are probably much stiffer at 5 1/2" diameter on 24' and 22'
length. I don't think the the press of wind alone will force the
curve out of the mast if positioned accordingly. I may be wrong. I
have sent a fax to PB&F, no answer yet.
Launching pics soon to come!
Bjørn
--- In bolger@y..., "Jack&Lois" <jalo@i...> wrote:
> Hi Bjorn. Really excited to hear of the pending launch of WDJ. I'll
harass
> you regularly when I finally get started on mine. I'll be
relaunching a
> micro in the spring. Re. mast problem: it may be totally
irrelevant, but I
> just made a new mast for my Gypsy. The previous mast had a nasty
kink in the
> top 2 ft. Rather twisty, but mostly canted aft. It reeked havoc
with the
> upper half of the leach, causing excessive flapping and wind
spillage. It
> (the kink) got worse with age. The new mast still wound up with a
suble
> curve (local lumber yard white spruce), though still a vast
improvement over
> the old one. I reasoned that the curve should be oriented aft, but
by
> mistake I carefully laced the snotter eyelet on the wrong side of
mast. Too
> impatient to re-do it I allowed the curve to go forward. The result
is that
> wind stress on the sail straightens the mast beautifully and the
sail trims
> better than it ever has. What I DON'T know is what this means re.
strength
> of mast when bent against the natural curve. So far so good. Had
her out two
> days ago in vicious squalls on a local lake. A few creaks and
groans from
> mast partner and my sheet bale let go (nearly yanked my arm out of
socket
> getting back down the lake on a broad reach), but the mast held
together
> fine. Perhaps someone else on the list can comment on the dymamics
of
> reverse curve bending stress. All the best. Can hardly wait to see
your
> launch shots.
>
> jeb, still Micro grinding on the shores of Fundy
Hi Bjorn. Really excited to hear of the pending launch of WDJ. I'll harass
you regularly when I finally get started on mine. I'll be relaunching a
micro in the spring. Re. mast problem: it may be totally irrelevant, but I
just made a new mast for my Gypsy. The previous mast had a nasty kink in the
top 2 ft. Rather twisty, but mostly canted aft. It reeked havoc with the
upper half of the leach, causing excessive flapping and wind spillage. It
(the kink) got worse with age. The new mast still wound up with a suble
curve (local lumber yard white spruce), though still a vast improvement over
the old one. I reasoned that the curve should be oriented aft, but by
mistake I carefully laced the snotter eyelet on the wrong side of mast. Too
impatient to re-do it I allowed the curve to go forward. The result is that
wind stress on the sail straightens the mast beautifully and the sail trims
better than it ever has. What I DON'T know is what this means re. strength
of mast when bent against the natural curve. So far so good. Had her out two
days ago in vicious squalls on a local lake. A few creaks and groans from
mast partner and my sheet bale let go (nearly yanked my arm out of socket
getting back down the lake on a broad reach), but the mast held together
fine. Perhaps someone else on the list can comment on the dymamics of
reverse curve bending stress. All the best. Can hardly wait to see your
launch shots.
jeb, still Micro grinding on the shores of Fundy
you regularly when I finally get started on mine. I'll be relaunching a
micro in the spring. Re. mast problem: it may be totally irrelevant, but I
just made a new mast for my Gypsy. The previous mast had a nasty kink in the
top 2 ft. Rather twisty, but mostly canted aft. It reeked havoc with the
upper half of the leach, causing excessive flapping and wind spillage. It
(the kink) got worse with age. The new mast still wound up with a suble
curve (local lumber yard white spruce), though still a vast improvement over
the old one. I reasoned that the curve should be oriented aft, but by
mistake I carefully laced the snotter eyelet on the wrong side of mast. Too
impatient to re-do it I allowed the curve to go forward. The result is that
wind stress on the sail straightens the mast beautifully and the sail trims
better than it ever has. What I DON'T know is what this means re. strength
of mast when bent against the natural curve. So far so good. Had her out two
days ago in vicious squalls on a local lake. A few creaks and groans from
mast partner and my sheet bale let go (nearly yanked my arm out of socket
getting back down the lake on a broad reach), but the mast held together
fine. Perhaps someone else on the list can comment on the dymamics of
reverse curve bending stress. All the best. Can hardly wait to see your
launch shots.
jeb, still Micro grinding on the shores of Fundy
Hei Daniel,
Please come for a sail trip next time you are in Oslo. The boat will
be launched this month!
Bjørn
from sunny Oslo :-)
Håper alt er vel i Tromsø
Please come for a sail trip next time you are in Oslo. The boat will
be launched this month!
Bjørn
from sunny Oslo :-)
Håper alt er vel i Tromsø
--- In bolger@y..., "kinguq" <daniel.pike@l...> wrote:
>
> Hei Bjorn:
>
> How about sideways? (just kidding)
>
> I guess some sailboats have running stays to adjust mast curvature,
> and the desired curvature depends on the wind conditions. Just
> thinking about it, having the mast curve towards the stern would
> loosen the luff and leech somewhat, possibly making for a more
baggy
> sail, better in light winds. Having it curve towards the bow would
> have the opposite effect?
>
> I have never seen a sailboat with a mast that curved forwards, but
I
> have seen lots with a slight curvature to the stern.
>
> Jeg gleder meg til å se på båten.
>
> Med vennlig hilsen,
>
> Daniel.
> from rainy Tromso, Norway.
>
> --- In bolger@y..., "bjharbo" <bharbo@o...> wrote:
> > Dear Group,
> > Planed and sanded the masts yesterday. Making the transition
> between
> > the square foot, the round "metaphysis" and the square masthead
was
> > tricky.
> > However: the main mast has a substantial curvature. No time for
> > making another one. How is the mast to be oriented? Convexity
> > pointing forward or aft?
> > Bjørn in Oslo
> > Schooner captain in spe
Hei Bjorn:
How about sideways? (just kidding)
I guess some sailboats have running stays to adjust mast curvature,
and the desired curvature depends on the wind conditions. Just
thinking about it, having the mast curve towards the stern would
loosen the luff and leech somewhat, possibly making for a more baggy
sail, better in light winds. Having it curve towards the bow would
have the opposite effect?
I have never seen a sailboat with a mast that curved forwards, but I
have seen lots with a slight curvature to the stern.
Jeg gleder meg til å se på båten.
Med vennlig hilsen,
Daniel.
from rainy Tromso, Norway.
How about sideways? (just kidding)
I guess some sailboats have running stays to adjust mast curvature,
and the desired curvature depends on the wind conditions. Just
thinking about it, having the mast curve towards the stern would
loosen the luff and leech somewhat, possibly making for a more baggy
sail, better in light winds. Having it curve towards the bow would
have the opposite effect?
I have never seen a sailboat with a mast that curved forwards, but I
have seen lots with a slight curvature to the stern.
Jeg gleder meg til å se på båten.
Med vennlig hilsen,
Daniel.
from rainy Tromso, Norway.
--- In bolger@y..., "bjharbo" <bharbo@o...> wrote:
> Dear Group,
> Planed and sanded the masts yesterday. Making the transition
between
> the square foot, the round "metaphysis" and the square masthead was
> tricky.
> However: the main mast has a substantial curvature. No time for
> making another one. How is the mast to be oriented? Convexity
> pointing forward or aft?
> Bjørn in Oslo
> Schooner captain in spe
Howard Chappelle wrote that a curved mast should have the convex side
aft, concave forward. I don't know why this is the case, but he
should know. Good luck.
Jamie Orr
aft, concave forward. I don't know why this is the case, but he
should know. Good luck.
Jamie Orr
--- In bolger@y..., "bjharbo" <bharbo@o...> wrote:
> Dear Group,
> Planed and sanded the masts yesterday. Making the transition
between
> the square foot, the round "metaphysis" and the square masthead was
> tricky.
> However: the main mast has a substantial curvature. No time for
> making another one. How is the mast to be oriented? Convexity
> pointing forward or aft?
> Bjørn in Oslo
> Schooner captain in spe
Dear Group,
Planed and sanded the masts yesterday. Making the transition between
the square foot, the round "metaphysis" and the square masthead was
tricky.
However: the main mast has a substantial curvature. No time for
making another one. How is the mast to be oriented? Convexity
pointing forward or aft?
Bjørn in Oslo
Schooner captain in spe
Planed and sanded the masts yesterday. Making the transition between
the square foot, the round "metaphysis" and the square masthead was
tricky.
However: the main mast has a substantial curvature. No time for
making another one. How is the mast to be oriented? Convexity
pointing forward or aft?
Bjørn in Oslo
Schooner captain in spe