It's Spring In The Skagit Valley

When traveling between our log home on Camano Island and Anacortes, we pass thru the Skagit Valley. Why would I be talking to you about our commute route?

Well, because this:

What better way to shed the winter blahs than to gaze upon 100 acres of daffodils? OK, I'm not a farmer, so my estimate of the field size is "unofficial", but it is huge.  And it is one of many, all filled with a riot of daffodils, and they're all screaming, "WaHOO! It's SPRING!"

And then, just when the daffs are about spent, and the fields begin to take on a bronze hue, it's time for the tulips!

Again, I'm no farmer, and it changes from year to year, but I think there must be more than twice as much acreage devoted to tulips as there is to daffs.

Because there are more of them, and because they come in so many different colors, the fields full of tulips are stunning.  And the farmers seemingly plant them so that adjacent colors spark off of each other.

Like for any crop, good farming practice demands crop rotation.  And this year, the fields next to the road our route takes us on are being devoted to other things, so all the tulip fields are pretty far in the distance, making for crummy pictures.  And for copyright reasons, I won't snag some of the gorgeous pictures out there...  but I will make it easy for you to see them:  Just click here.

If you are in the area, things are at their peak right now.  Avoid the crowds and drive up here Thursday or Friday...

Skagit valley comes to Eolian

It's Spring In The Skagit Valley

Corrosion, Corrosion

For a boat on salt water, corrosion is an omnipresent demon.

Even inside.  This is the spout on our galley sink which is piped to a saltwater foot pump. And to the cooling water discharge from our 12V refrigeration system, meaning that it has saltwater flowing out of it whenever the refrigeration compressor is running, as a telltail. Look closely at the inside of the right-hand bend... yup, the aluminum has corroded thru. I don't understand this... aluminum is supposed to be reasonably proof against saltwater.  The pipe is clamped to the sink in a plastic fixture, and is connected below the sink via vinyl tubing...  ruling out galvanic corrosion.  The entire refrigeration system is 12V, so stray 110V current cannot be an issue.  The compressor is powered by an external motor thru a V-belt. 

But.

The motor and compressor are mounted on the same metal plate, and there are some pressure switches to control the motor mounted on the compressor.

Is that enough to cause stray current corrosion, tho there is no direct connection between the refrigeration unit and the aluminum tubing except via the saltwater itself?

Or is the corrosion simply the result of flowing saltwater washing away the protective oxide layer on the inside of the aluminum tubing?  I am very interested in what the net.wisdom has to say about this...

Regardless, this is the second spout that I have installed there, and they have gotten ridiculously expensive.  I am not planning to buy a third one.

Two pieces of 7/16" stainless tubing

Instead, I bought some thin-gauge 316 stainless tubing from Online Metals.  Now, if you've ever attempted to bend tubing, and especially thin-gauge tubing, you know that it requires special tooling to prevent kinking.  The tooling constrains the tube so that it can't collapse and kink while it is being distorted.  I looked up what a tubing bender for 7/16" tubing costs on the Interwebs, and Oh. My. Gosh.

OK, a Plan B is needed.

It is also possible to prevent collapse/kinking if the tubing is filled solidly with something incompressible.  Apparently some people have used ice (fill with water; freeze), but I was concerned that I'd never get the tubing bent before the ice started to melt.  This is where Wood's metal comes in.

This is Wood's metal - it is a eutectic alloy of 50% bismuth, 26.7% lead, 13.3% tin, and 10% cadmium by weight.  It melts at 158°F

I just happened to have some. 

Wood's metal foundry

For a foundry, I purpose-bought a can of tomato paste (69¢), and froze the tomato paste, retaining the can - just the right size.  I put it in a pan with some water and brought the water to a boil - 212°F, or about 50° of superheat.  I then poured the molten metal into the tubing (I had previously blocked one end of the tubing by pushing it into a wine cork - we seem to have plenty of these).  I then immediately plunged the filled tubing into a container of cold water - I had read that quenching creates a fine crystal structure in the Wood's metal, making it more ductile (read: easier to bend).

OK, now to bend.  I created a bending jig and lag-bolted it to a 4x4 in our shed:

Homemade bending jig

Yup, it bent just fine - no kinking, no collapse.

Recovering the Wood's metal

All that remained was to reheat the bent tubing in another boiling water bath to remelt the Wood's metal and pour it out.

And since our galley sink has two of these spouts (one for salt water and one for fresh water, foot-pumped from the tanks), I made another spout.  Gotta be symmetrical, don't you know.

Done
(Clever camera angle conceals dirty dishes in the sink)

A little boat yoga, and the galley sink looks better than it ever has!

Corrosion, Corrosion

Canvas, Round Two

First of all, thank you, all of you, for your patience and for your well wishes.  They are very much appreciated!  The neck surgery was to correct a nerve pinch in my cervical spine that was causing me to lose the use of my right hand.  Recovery is proceeding apace.

OK, enough of that.  In the past few days, we had an appearance (sadly brief) of nice spring weather... weather where the following all coincided:

• It wasn't raining
• It was warm
• It wasn't windy

For this year, it was that last item which has been the rarest.  But all three things did indeed happen, and so I got out the DuraSkrim and patterned the forward roof panel on our bimini.  As I did for the rear panel, I patterned right over the existing canvas.  This allowed me to have everything tensioned and in place, so that the replacement panel should fit well.  I hope.

The pattern, before trimming

And glory of glories, the weather held for the next day, which allowed me to use the pattern to cut out the pieces to make the roof panel.  As you can see from the picture above, there simply is not enough room to do this down below on Eolian, out of the weather, making this an outside job.
 

Our existing dodger has the roof panel and the forward panel (the "windshield") attached, making the combination large and unwieldy.  I will not be continuing that design.  Instead, I will use Common Sense fasteners (male on the roof, female on the forward panel) to fasten the panels to each other.

I expect to start sewing on Friday, but I doubt that I will finish this weekend.  Besides doing the sewing, there is the matter of the installation of all those Common Sense fasteners.

[Finally, a brief note to those of you to whom I cryptically mentioned Wood's metal:  that post is coming, it's just not far enough along yet.]

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Canvas, Round Two

Not up to it

Sorry there hasn't been any activity here of late - I had neck surgery and I'm just not feeling up to it yet.

Not up to it