Richard Casady wrote:
On Mon, 07 Jan 2008 06:46:33 -0500, wrote:

On Mon, 07 Jan 2008 04:52:02 GMT, "Island Teak" wrote:

wrote in message
...
On Sun, 06 Jan 2008 01:41:02 GMT, "Island Teak"
wrote:


I provide teak decking for the DIY folks and have received several
inquiries
regarding laying thin (1/4") teak strips over an existing failed teak
deck.
Traditionally laid teak decks primarily fail because caulking separates or
the bungs loosen and water corrodes the fasteners that then enters the
subdeck. In theory.... securing all loose decking, filling voids and then
rough sanding the existing teak deck should provide a sound subdeck to
adhere the new 1/4" decking to.

Does anyone in this forum have experience regarding adhering new teak over
an existing teak deck ? Especially interested if someone has done this
10
years ago.

Two issues come to mind:

Teak decks are pretty heavy, and adding more weight that high up in the
boat is
probably not a great idea.
First off teak is not a heavy hardwood. A square foot of 1/4" x 1-5/8" teak
weighs 14 ounces.
Teak decks are heavy. When replacement time arrives, many sailors wisely remove
the teak and simply leave it off. For cruisers, that gives them extra capacity
for things that they DO need without raising the waterline. I'd rather have 400
pounds of water, or a bigger battery bank,(both lower in the hull) than 400
pounds of teak on the deck.

I think an engine for a sail boat should have enough power to reach
hull speed into a 25 MPH wind. Many boats have too small an engine.
More batteries, fuel, or water is always good, if the.motor is already
big enough. Of course, more power is probably more trouble and money
than it is worth.


Wow, hull speed into 25 knots of wind. That's a lot of power.

It would be impossible to power at hull speed into a 25 knot wind, and
the seas that much wind kicks up.

On Tue, 08 Jan 2008 18:55:46 -0800, Jim wrote:

Wow, hull speed into 25 knots of wind. That's a lot of power.

Of course it isn't. Remember, power required varies with the cube of
the speed, and hull speed just isn't fast. I figure maybe 100 HP for a
thirty foot boat. Maybe less.
It's the fifteen horse motors I object to. Battleships won't do hull
speed on 1 to 4 HP per ton either. I am guessing you can get
three times what is average, for not too much space and weight.

It would be impossible to power at hull speed into a 25 knot wind, and
the seas that much wind kicks up.

Of course it is possible, it just takes sufficient power. You can get
500 HP out of a ton or so of diesel machinery. Many modern engines,
Yanmars for example, put out more than one HP per cubic inch. It is
certainly possible and the fact that most boats won't do it is rather
the point of my post. I figure you can live with a ten percent mileage
penalty with the bigger motor.


If there is enough room for large waves to kick up, you can generally
sail. I had in mind up a narrow river channel against wind, current,
and tide. Places like the inside passage to Alaska, more motor might
be handy.

I have done lots of sailing, not cruising, in more than 25 MPH of wind
and 2 to 3 foot waves. I used to launch a Sunfish off the beach into a
25 MPH wind. You waded out to where the water was deep enough to lower
the daggerboard. And on the return I would just run it in with the
board out. The rudder would kick up like a centerboard. Sometimes got
it up three or so feet past the waters edge, if I timed a wave just
right. Same lake had some 25 MPH sailboats: scows.

Richard Casady wrote:
(about hull speed to 25 MPH winds)

I figure maybe 100 HP for a thirty foot boat. Maybe less.
It's the fifteen horse motors I object to. Battleships won't do hull
speed on 1 to 4 HP per ton either.


Here in Denmark, 100 HP in a 30' boat would immediately classify it as a
motorboat. With enough rig we might accept it as a motor sailer, but most
people here would not consider it a reasonable configuration for a
sailboat.

Maybe it is a cultural thing, but most sailors here don't compare their
boats to battleships.

"Hull speed", as far as I understand the term, is the maximum a boat can
possibly do. Not the minimum it has to attain under any circumstances, sail
or motor.

I quite enjoy sailing on an old 8-meter boat, about 30' long. I don't
remember the details of the engine, but it is well in the neighbourhood of
your 15 HP. It is more than sufficient to get us out of Copenhagen harbour
and in again.

In my (too short) spare time I dream of building my own boat - that's why I
follow this newsgroup. It will be under 30' long, probably rigged as a
schooner, and I will not go to the excess of 15 HP motor, more like half of
that.

But, of course, it all depends on where, how, and why you want to sail.


Best regards

Heikki

I have done lots of sailing, not cruising, in more than 25 MPH of wind
and 2 to 3 foot waves.

25mph winds? Force 5-6 and only 2-3ft waves? uh huh...

On Wed, 09 Jan 2008 16:16:46 GMT, wrote:

How big was the auxiliary on your Sunfish?

How about the family heirloom 1920 vintage 1/2 HP Evinrude.? My dad
used that motor as the auxiliary on a 20 foot schooner that he built
on a rowboat hull. You could probably mount it on a Sunfish, it maybe
weighs 25 pounds. Has a nasty starting rope, but it is at least easy
to start. It may even have low hours on it, no way to tell.

Casady