Rudder stock design 4 Mast gluing

In yet another installment of "I try to re-design the rudder stock" I have received yet another set of plans from a Goat Island Skiff builder in New York.  He has graciously supplied me with these two schematics of his own design, as a solution to removing the tiller from the rudder assembly without having to take the rudder off the transom.  It is self-explanatory:

I really like this design, it is better than mine for two reasons:  1. It maintains Mr. Storers rudder stock design and hopefully solves the structural issue that he was concerned about, 2. There is less time fiddling over the transom pulling very critical pins over water of yet-to-be-determined depth, if you get my drift.  I can remove the tiller from the safety of the cabin.  Unfortunately, I will still have a stub of tiller sticking into my domain, but I think, for now, this is the idea Im going to go with.  The great thing about the rudder stock is that it is simple and easy to construct, I can always make another.

In other news, the mast was glued in its first step today.  In the previous post, I shaped the narrow staves.  This was a workout, but I worked carefully, and Im happy with the result.  Then, off to make the spacers for the ladder frame.  I used a piece of fir that was lounging around the garage, some stud material.  I used some good parts, and cut them to fit.  The base plug meant a trip to Lowes.  This is the first wood part of the boat that was not bought at either of my two local lumber stores.  Sorry guys.  Anyway, an 8 piece of 4x4 cedar.  I thought about using fir, for a few bucks less, but I went with the rot-resistant cedar.  Its an important piece, its light, and it should be good.  The other spacers Ill goo up with epoxy and make them plastic.

Well, that was interesting how the photos lined up, but I like it!  Notice the base plug.  After a quick mock-up my lovely wife and I took one of the uncut stave stock pieces and brought it into the basement, where I can get an even floor workspace and a slightly higher temperature, better for quicker gluing.  We made sure that we could get the wood in and out of the basement two different ways, so I dont build the mast and then get it out.  I am positive I can get the mast out of the basement.

Layed out ready for the dry fit:

Sweet, I did it again, but I dont know how.  The mast is quite straight, but I decided to use one of the wide uncut staves as a backbone for gluing, that way I could ensure that the mast is straight with no wobbles.  It also gives me a good even workspace for gluing too.  I covered one stave with packing tape, and glued away:  Notice too, the hardwood runners that will be glued to the bottom of the hull, they are long ones and needed to be scarfed.

It went well.  The bricks are slightly nudging the mast into a straight position.  Youll also notice that you dont see much of the wide stave underneath this glue-up, thats because the tolerances are super tight.  I overcut my narrow staves by 1mm and it pretty much ate up all the space on the wide stave.  I briefly considered re-planing the staves, re-working the spacers, and then gluing, but my lovely wife stopped me with some business graduate degree mumbo-jumbo stuff and talked me out of it.  I might have to plane a little extra off the base to get it to fit in the mast step, and I can (with difficulty) enlarge the mast step as well if need be.

Tomorrow, gluing the wide staves and completing the box.
 

Designing new rudder stock 1

Im trying to build a swing-up rudder stock design for my Goat Island Skiff, similar to the one I have on my Laser, except wood, and fitted for the GIS rudder.  The original plans call for a daggerboard style rudder stock where the rudder is removed vertically through the box, and the tiller is permanently attached to the box.  See here.  I am not a big fan of this design, though I appreciate its simplicity.

Here is why:

1.  I do not want a permanently attached tiller to the rudder stock.  I would like to be able to remove the tiller, and leave the rudder in the water, or at least raised but still attached to the transom.

2.  I do not like the bungee cord design to the hold the rudder in place

3. I want to use pintles and gudgeons, which would be difficult with a permanently attached tiller and dropping the assembly into place.

Here is a quick mock-up of a slightly enlarged rudder box per the plans, with a rudimentary rounded rudder top for swingability.

The stock has been extended 3 cm aft, and 1 cm down.  I am limited by the size of the transom and the location of the hole to accept the tiller in the transom.  The tiller would run between the two side of the stock across the top of the rudder and be fastened with a pin.  The spacer in the front of the box would be the same called for in the plans.  The exterior of the stock would have the two re-enforced areas per the plans, running across the top and bottom, and in addition a third re-enforced area to support the axle.  I will probably also trim the leading and trailing edges of the top section of the rudder in the box area to get a good climb out of the water as well as keep it from dragging along the beach.

Thoughts?

Knees are fitted

Enough said! Big day mentally, for this build. This was a step I was really looking forward to finishing. I feel like the hull is basically complete, besides the millions of little things. Structurally, shes sound. I like that.




The bow knee/breasthook took two tries, but I am happy with it. The plans call for the stem to be basically 19mm below the top of the ply, and the breasthook will slip over the top of it. My stem comes right to the top (my mistake) so Im butting it up against the back end. The fit is not super tight, but close enough to be filled with a little epoxy. The rest of the fit is really nice.

The stern knees also took a few tries and were a little trickier, I thought, due to the cut-out for for the inwale and the bevels needed to accommodate the sides and the transom.


Heres what I wrote to my compatriot in Sacramento about making the stern knees.


1. First I traced the corner before I installed the inwale spacer or the inwale. If you didnt do this, dont despair, make something up.

2. Bevel the Transom-side FIRST before making any cuts to accomodate the inwale. This way, you will have it appropriately sized before you cut the space for the inwale. This is what I did not do my first time around, and when I beveled Transom-side the whole knee slid back, creating a gap aft of the inwale.

3. Measure the cut you need for the inwale

4. Cut space for inwale.

5. Bevel Side-side. Then, eyeball the inside of the cut, it will be the same bevel. I used my dremel drum sander, and chiselled out the corner, carefully.

Tight DF is a bitch to plane/bevel.

Good luck. Make sure you can make a few of them if need be, materials wise.

See better pictures here.

Knees closer up rear seat inspection hatches

So earlier this month I neglected to show some closer up pictures of the knees and the breasthook.  Here they are.  You may notice that I chose to not stylize the knees in any fashion, as other Goat Island Skiffs do.  I am a big fan of straight lines, utilitarianism, and functionality.  (Also WPA artwork and air travel posters from the early 20th century, for very much the same reasons.)  Curvy knees and breasthooks are nice, but I dont think they deliver the straightforwardness I enjoy in design.  Obviously, this is personal preference.  Curvy knees can look fantastic.  The stem in the bow will be cleaned up at some point, maybe a small cover.

Today I also added the locations of my inspections ports.  I have chosen an 8" Beckson screw-in inspection port for easy ingress and egress of larger items.  The smaller 6" port is for access to the rudder gudgeon fittings.  It is off-center due to the seat cleat that runs down the middle of the compartment from BH4 to the transom.  This could have been circumnavigated had I thought about it beforehand, but I didnt, so this is what I get.  Not the end of the world.

Finally, a quick look on how I glued the knees in place:  Two tape covered shims held in place by clamps for vertical support, and the clamp just to weight it up against the side of the hull.  Not too much weight is needed, because the knee could slide up, also, if its beveled correctly it wont slide down.

Rudder and daggerboard ready to be shaped mast lumber!

Today was a surprisingly uneventful day in the my personal Goat Island Skiff world.  Ive been stumbling around lately trying to get traction on a number of projects, some held up by other projects that needed to be completed.  Two large steps forward happened today.

First:  I wandered into Goose Bay Lumber haphazardly and found 4 pieces of 20 x1x4 finished Douglas Fir boards.  All of them were straight, maybe three knots in the bunch, and relatively nice straight grain to boot.  Just four, all four were good, I grabbed them.  These will be my mast that powers my vessel.  I had them cut to 15 8", since the mast is just a smidge over 15 6" tall, this gives me an inch of "oof" space.  Also, they had a 15" planer, I had my daggerboard, and we fed it into the mouth of the machine.  It spit it out a little thinner, and nice and smooth on one side.  The planer was not a precision machine, and while I can lose 0.75mm, Id rather do that by hand than take out a huge chunk or something.  But it helped.

Second:  I called my bro-in-law and he was home, with his 13" planer.  I strapped my mast bits onto the roof of my sedan in a fashion that screamed "I will impale the person in front of me if you rear-end me" and roared up the interstate to the second planer.  In short order I planed my rudder down to the requisite 22mm and it came out amazing.  Then, away I planed my mast stock down to the 1/2" it needs to be.  Back on the roof with a little less mass and a little more wobbliness and back to my garage where I trimmed the trailing edge of my blades and got them ready for shaping.

 

Heres my mast stock. Hmmmm Hmmm delicious stock.

 

So I need to shape the rudder, to make the rudder box, so I can install the rudder hardware to the boat, so I can finally glue down the rear seat.  Then, daggerboard so I can glue down the centercase.  Then, make the mast, make some spars, and then I can start finishing my boat.  One day, one step, at a time.