Re: [bolger] Re: Now that winter is over... / Yulohs
>I have not yet tried my yuloh out, but I sent a picture of itYou're confusing angle of attack with teh angle in the water. If it's too
>to Phil Bolger, and his very short reply [I paraphrase]
>was that yulohs work on the same principle as propellers,
>except that they oscillate instead of rotate. That tells me
>that plenty of angle shouldn't hurt, [unless, I suppose,
>you start to get 'stall'.]
vertical, you are getting less power, because you are exerting less
leverage on the yuloh. The loom of a yuloh rotates say 25 degrees or so
either side of dead center. That is the angle of attack. The angle the
blade makes with the surface of the water is another matter.
--
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.
_________________________________
>And how much to curve the loom?I did an exhaustive survey of all the "available with some travail"
>
>Sorry for my thickheadedness. Any yuloh users or scholars, please set
>me straight. This seems like a good tail-end-of-winter indoor project.
material on Yulohs for Messing Bout in Boats maybe 3 years back.
Try googling "Cranks with Planks".
Blade should be horizontal. Angle of entry doesn't seem to be super
critical, but generally it's well under 45 degrees.
Chinese loom is curved, but only as much as necessary so someone standing
in the yulohing-position on the deck can comfortably work it. Some Chinese
craft have such high sterns that a yuloh would be impossibly long if
straight or the yuloh-er would be standing dead aft one what I imagine is a
precarios perch.
--
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 was looking at a yuloh too. I contacted Craig O'Donnell who sent
me a load of information, if you send me your email address I'll
forward the whole thing to you, pictures and all. (Send the address
tojorr@..., yahoo doesn't seem to allow complete
addresses.)
I haven't taken it very far yet. I'm going to make up some oars so I
can get into the Shipyard Raid, but might still try a yuloh
sometime. I'd like to see how they compare.
Jamie Orr
me a load of information, if you send me your email address I'll
forward the whole thing to you, pictures and all. (Send the address
tojorr@..., yahoo doesn't seem to allow complete
addresses.)
I haven't taken it very far yet. I'm going to make up some oars so I
can get into the Shipyard Raid, but might still try a yuloh
sometime. I'd like to see how they compare.
Jamie Orr
--- Inbolger@yahoogroups.com, "GarthAB" <garth@b...> wrote:
>
> I'd like to make a yuloh for Cormroant. I'm a bit confused by
reading
> that WoodenBoat article, and the Japanese article on the ro, and the
> other yuloh links.
>
> The ro (and David Beede's yuloh) seem to be almost all blade and
very
> little loom. The Zeigers' seems to be mostly loom and only 2 1/2 or
3
> feet of blade. And the WB article seems to say you can have the
blade
> either vertical (like a shark fin) or horizontal (like a whale
tail).
> Unfortunately I can't get the larger versions of the WB pictures to
> pop up, so it's hard to make out exactly what's being said.
>
> And beyond that, I'm a little unclear on the best angle for the
> blade's length to enter the water -- should it point down at 45
> degrees, like the illustration of the ro, or is it better to angle
it
> more shallow?
>
> And how much to curve the loom?
>
> Sorry for my thickheadedness. Any yuloh users or scholars, please
set
> me straight. This seems like a good tail-end-of-winter indoor
project.
>
> All best,
> Garth
Cool! A folding one. Now I'm hooked.
All best,
Garth
All best,
Garth
--- Inbolger@yahoogroups.com, Bruce Hallman <bruce@h...> wrote:
>http://community.webshots.com/photo/152437024/152438107TuGtQS
>
> There are a few others in the albums too.
>
> > Have you posted pictures of your yuloh?
> > Garth
http://community.webshots.com/photo/152437024/152438107TuGtQS
There are a few others in the albums too.
There are a few others in the albums too.
> Have you posted pictures of your yuloh?
> Garth
Hi Bruce --
Have you posted pictures of your yuloh? Sorry if I missed them first
time around. If possible, can you repost a link or two?
All best,
Garth
Have you posted pictures of your yuloh? Sorry if I missed them first
time around. If possible, can you repost a link or two?
All best,
Garth
>
> I have not yet tried my yuloh out, but I sent a picture of it
> to Phil Bolger, and his very short reply [I paraphrase]
> was that yulohs work on the same principle as propellers,
> except that they oscillate instead of rotate. That tells me
> that plenty of angle shouldn't hurt, [unless, I suppose,
> you start to get 'stall'.]
> Winter is over??Sorry, false alarm. The 70 degree weather last week has given way
> HJ
to a new cold spell. I am going sailing today anyway. Bruce.
http://weather.yahoo.com/forecast/USCA0987_f.html
> degrees, like the illustration of the ro, or is it better to angle itI have not yet tried my yuloh out, but I sent a picture of it
> more shallow?
> Garth
to Phil Bolger, and his very short reply [I paraphrase]
was that yulohs work on the same principle as propellers,
except that they oscillate instead of rotate. That tells me
that plenty of angle shouldn't hurt, [unless, I suppose,
you start to get 'stall'.]
I'd like to make a yuloh for Cormroant. I'm a bit confused by reading
that WoodenBoat article, and the Japanese article on the ro, and the
other yuloh links.
The ro (and David Beede's yuloh) seem to be almost all blade and very
little loom. The Zeigers' seems to be mostly loom and only 2 1/2 or 3
feet of blade. And the WB article seems to say you can have the blade
either vertical (like a shark fin) or horizontal (like a whale tail).
Unfortunately I can't get the larger versions of the WB pictures to
pop up, so it's hard to make out exactly what's being said.
And beyond that, I'm a little unclear on the best angle for the
blade's length to enter the water -- should it point down at 45
degrees, like the illustration of the ro, or is it better to angle it
more shallow?
And how much to curve the loom?
Sorry for my thickheadedness. Any yuloh users or scholars, please set
me straight. This seems like a good tail-end-of-winter indoor project.
All best,
Garth
that WoodenBoat article, and the Japanese article on the ro, and the
other yuloh links.
The ro (and David Beede's yuloh) seem to be almost all blade and very
little loom. The Zeigers' seems to be mostly loom and only 2 1/2 or 3
feet of blade. And the WB article seems to say you can have the blade
either vertical (like a shark fin) or horizontal (like a whale tail).
Unfortunately I can't get the larger versions of the WB pictures to
pop up, so it's hard to make out exactly what's being said.
And beyond that, I'm a little unclear on the best angle for the
blade's length to enter the water -- should it point down at 45
degrees, like the illustration of the ro, or is it better to angle it
more shallow?
And how much to curve the loom?
Sorry for my thickheadedness. Any yuloh users or scholars, please set
me straight. This seems like a good tail-end-of-winter indoor project.
All best,
Garth
Couple of Yuloh links
http://www.simplicityboats.com/yulohpage.html
http://www.alaska.net/~mzeiger/MJprogress04.html
Winter is over??
HJ
Jason Stancil wrote:
http://www.simplicityboats.com/yulohpage.html
http://www.alaska.net/~mzeiger/MJprogress04.html
Winter is over??
HJ
Jason Stancil wrote:
>Bruce- if you get the chance to put the yuloh to use let us know how
>it goes. Since my navigator is under a snow covered tarp i have been
>looking for a project....thinking about cutting a foot or two out of
>the middle of my yuloh an increasing the angle of the joint. Yours
>seems to be a bit shorter with a steeper break than my plank has
>Thanks,
> Jason
>
>
>
>
>
>
Bruce- if you get the chance to put the yuloh to use let us know how
it goes. Since my navigator is under a snow covered tarp i have been
looking for a project....thinking about cutting a foot or two out of
the middle of my yuloh an increasing the angle of the joint. Yours
seems to be a bit shorter with a steeper break than my plank has
Thanks,
Jason
it goes. Since my navigator is under a snow covered tarp i have been
looking for a project....thinking about cutting a foot or two out of
the middle of my yuloh an increasing the angle of the joint. Yours
seems to be a bit shorter with a steeper break than my plank has
Thanks,
Jason
Now that winter is over, forecast high temperatures today
of 70 degrees F., I hope to put my Micro Navigator in
the water for a 'sail' tryout this weekend. Photos to follow.
I see that other places in the world are not thawed yet.
http://www.latitude38.com/LectronicLat/2005/0205/202/Feb2.html
of 70 degrees F., I hope to put my Micro Navigator in
the water for a 'sail' tryout this weekend. Photos to follow.
I see that other places in the world are not thawed yet.
http://www.latitude38.com/LectronicLat/2005/0205/202/Feb2.html
If you go to duckworks you'll see John Lewis is giving away his
Chugger. He's in Iowa but, hey, it's free and perfect for what you
want.
Chugger. He's in Iowa but, hey, it's free and perfect for what you
want.