[bolger] Re: Teal Skeg
>I am able to lift my teal by the bow with all the weight at the other
> Two questions:
>
> 1) Has anyone broken this part off their teal? Looks like it could be
> done by dropping the boat or loading up at the shore without looking.
end on the skeg. It also make a nice handle for carrying the boat
upside down. Feels very, very solid. Maybe if you picked it up and
dropped the stern...
On the other hand, I am disapointed with the durabitly of the fir/glass
skeg. I dragged the boat up and down a sandy beach all summer, and it's
worn considerably. I think in the very near future, the shoe is going
to get planed down and fitted with a bit of oak. Hopefully that will
wear a little better.
I've also cracked both of my thwarts. The boat flexxes a bit when being
turned over single-handed. I'm going to remove them and try something a
little beefier. A 2x4 aft and a 2x6 for the mast partner should do the
trick!
--David
DGO wrote:
the transom extension that brings the rudder hinges verticle. I bent up the
rudder hinges a bit, scraped up the rudder, but didn't bother the extension.
It is two laminations of 3/4 CDX pine exterior, with epoxy fillets and one
layer of 4 inch glass tape on each side.
point of boat.
force needed to move the rudder. You are effectivly moving the hinges
further forward from the center of force on the rudder.
That said, you can always try it your way, and if it doesn't work, go back
to plans.
> Looking at the teal plans, there is one part that makes me a littleI don't have a teal, but I've dropped my D4A off the back of the truck onto
> nervous.
>
> It looks like PCB drew many of the instant boats to use the same rudder
> and leeboard (as well as sail) The rudder uses a vertical hing line. To
> accommmodate this on the teal, he drew a 8" skeg of the stern of the
> boat. This is a piece of wood hanging of the bottom of the boat that is
> unsupported at the far end.
>
> Two questions:
>
> 1) Has anyone broken this part off their teal? Looks like it could be
> done by dropping the boat or loading up at the shore without looking.
>
the transom extension that brings the rudder hinges verticle. I bent up the
rudder hinges a bit, scraped up the rudder, but didn't bother the extension.
It is two laminations of 3/4 CDX pine exterior, with epoxy fillets and one
layer of 4 inch glass tape on each side.
>Immersed area, aspect ratio (hight to width ratio), distance from pivot
> 2) What are the "important" stats for a rudder to avoid changing the
> handling of the boat?
>
point of boat.
>Hinging on the sloping transom instead of verticly will increase the helm
> It would be nice to use a rudder who's hinge line followed the slope of
> the transom. There are numerous examples in the local marine museum of
> craft in the same size, shape, and sailplan with shallow, fat rudders
> hinged on the sloping transom. From a construction standpoint, it is
> simple to copy them. What I am curious about is whether or not they are
> in the museum because they performed so badly they did not get used to
> death. I know why the design was popular here: a lot of the water had
> "sneaky" bottoms due to sub-aquatic vegitation, plentifull oysters, and
> oyster harvesting, etc. The shallow rudder does not seem to stick out
> below other features of the boat.
force needed to move the rudder. You are effectivly moving the hinges
further forward from the center of force on the rudder.
That said, you can always try it your way, and if it doesn't work, go back
to plans.
Looking at the teal plans, there is one part that makes me a little
nervous.
It looks like PCB drew many of the instant boats to use the same rudder
and leeboard (as well as sail) The rudder uses a vertical hing line. To
accommmodate this on the teal, he drew a 8" skeg of the stern of the
boat. This is a piece of wood hanging of the bottom of the boat that is
unsupported at the far end.
Two questions:
1) Has anyone broken this part off their teal? Looks like it could be
done by dropping the boat or loading up at the shore without looking.
2) What are the "important" stats for a rudder to avoid changing the
handling of the boat?
It would be nice to use a rudder who's hinge line followed the slope of
the transom. There are numerous examples in the local marine museum of
craft in the same size, shape, and sailplan with shallow, fat rudders
hinged on the sloping transom. From a construction standpoint, it is
simple to copy them. What I am curious about is whether or not they are
in the museum because they performed so badly they did not get used to
death. I know why the design was popular here: a lot of the water had
"sneaky" bottoms due to sub-aquatic vegitation, plentifull oysters, and
oyster harvesting, etc. The shallow rudder does not seem to stick out
below other features of the boat.
Yes, I know that changing designs affect performance, but in this case
it looks like the origional design was influenced by the goal of
getting a fleet of different prototype boats build quickly. Since I do
not share that goal, I think it is definatly fair to question parts of
the design that seem to have been driven by that goal.
DGO
nervous.
It looks like PCB drew many of the instant boats to use the same rudder
and leeboard (as well as sail) The rudder uses a vertical hing line. To
accommmodate this on the teal, he drew a 8" skeg of the stern of the
boat. This is a piece of wood hanging of the bottom of the boat that is
unsupported at the far end.
Two questions:
1) Has anyone broken this part off their teal? Looks like it could be
done by dropping the boat or loading up at the shore without looking.
2) What are the "important" stats for a rudder to avoid changing the
handling of the boat?
It would be nice to use a rudder who's hinge line followed the slope of
the transom. There are numerous examples in the local marine museum of
craft in the same size, shape, and sailplan with shallow, fat rudders
hinged on the sloping transom. From a construction standpoint, it is
simple to copy them. What I am curious about is whether or not they are
in the museum because they performed so badly they did not get used to
death. I know why the design was popular here: a lot of the water had
"sneaky" bottoms due to sub-aquatic vegitation, plentifull oysters, and
oyster harvesting, etc. The shallow rudder does not seem to stick out
below other features of the boat.
Yes, I know that changing designs affect performance, but in this case
it looks like the origional design was influenced by the goal of
getting a fleet of different prototype boats build quickly. Since I do
not share that goal, I think it is definatly fair to question parts of
the design that seem to have been driven by that goal.
DGO