Rain, rain, rain

It’s raining amazingly long and consistently for San Diego. I hope the folks inland are doing fine. Our Saab friend and parts supplier, Paul, had his road wash out day-before-yesterday. He’s stuck at his remote home (with parts we need) and we’re stuck on the boat with too much rain to troubleshoot Buttercup. I hope Paul is having as good and mellow of a time as we are. Hot coffee this morning and moving into the hot tea for the day realm. Patter, patter goes all that rain.

We usually turn the inflatable Tinker Traveller upside down on the deck but, silly us, we left it right side up when we got here the other day. It has about 8″ of water in it. I need to go bail it out but I’m waiting for a lull. At least that’s my story.

Since we’re at the Fiddler’s Cover courtesy dock, we had the luxury of shore power all night long. Ah…that means we left on the computer that needs the OS upgrade and proceeded to download about 4-1/2 Gigabytes of files. This morning at 6 am it was done! I’m impressed that the tethered Sprint cel phone did so well with it. Now David is doing the install. So nice. He’s moving his OS over to my little small form factor (SFF) Shuttle computer which will then be his little SFF computer. He’ll also move the HDTV card and a few other things over as well. We’d originally built up the Shuttle as a clone/copy of a system that we put together for a customer doing some medical image processing. Before bringing it to the boat, we removed the important business guts–mainly the NI Labview card–from it and really have not been using it at all for over a year. So, it is nice that it will have a purpose on the boat. We’ll “retire” David’s larger computer for now. We have plenty of room for David to keep a full size computer aboard, but it is really nice to not use one all the time since the power drain is pretty big. My notebook is nothing in comparison to either the SFF or the fullsize computers.

Drip, drip, drip…that’s the other thing about all this rain. It drips off the main boom onto the charthouse roof. Each time I hear a drip I think something is leaking INSIDE the boat. It’s only the drip on the roof, though. We do have two leaks of import–one adjacent the toilet that is managed with a little pail on the sole to catch the drips. I know where it’s coming from but can’t really fix the problem for a while–so the pail does it’s thing. The other leak of significance is directly over our bed! The leak is along the port aft corner post of the charthouse and doesn’t have an easy fix either. The water is captured by a funny little hammock I built for this express purpose of catching water. The net hammock is lined with plastic and contains a high absorbency synthetic terry towel. Typically, dew and rain leave a few little drips in the towel. On the other hand, this rain has poured drip, drip, drip in for a couple days. I “emptied” the hammock last evening as it was actually full of water! I measured about 1/2 gallon. It took a couple days to get there. This morning, I emptied it again! It really rained hard last night!

When we did the rebuild of Mahdee, we re-roofed the charthouse but we did not rebuild its walls. There were just too many other things to do with the boat. This is one of the only areas that we “put off” for the future knowing that it was easier to access than other projects would be. So, it is no surprise that the scuttle and deck hatches do not leak, the charhouse roof is sound, but the charthouse walls have their issues. By design, the butted joints of wood to corner post create an opportunity for leaking. Before launch, I did put some cotton caulking and sealant there, but clearly it needs more! Further, the mitered joints around the charthouse windows provide opportunity for water seeping in. That is a much bigger project to take on. Someday we’ll remove the mitered window frames that a previous owner installed and we’ll put in traditional frames like Mahdee originally had. Someday. But, that day won’t be soon.

Rain, rain, rain.

Update–added at 2:00 pm–due to heavy rain and flooding, the nearby base, NAS North Island just sent everyone home keeping “essential employees” only. So, we wouldn’t be working on the car there anyway as they’ve just closed shop. Rain, rain, rain.

Re-arrange the Blog

The time has come for me to dig in and overhaul the blog. The old WordPress format was great but I really need to just sit down and re-do it. Argh. I’ll hope this can be a positive learning experience! Since we host the blog on our own server (no, not on the boat, it is located at a fixed facility “somewhere” out there (I suspect India since the price is so good for hosting) that means there are many little admin things that need to be done at the same time.

Today I’ll spend some time learning about all the “new” stuff i can do with WordPress.

The right stuff needed for “shaft log”

Mahdee had Tobin Bronze (a.k.a. Naval Brass) pipe/tubing used for her “shaft log” (that’s the hollow tube that the propeller goes through; it connects to a bearing on both the inside and outside of the boat) as well as for her “rudder post” (that’s the hollow tube that the rudder stock goes through). I’m having a very hard time finding suitable material for either one of these applications. The parameters are:

Inside and outside diameter must be correct: in the case of the shaft log, that’s 2″ schedule 40 pipe with ID of a sliver over 2″ and OD of 2.375″.

Corrosion resistance to seawater must be there and there are a range of alloys that fit this need.

Final thing, since the shaft log sits right up against some silicon bronze bolts which hold the back end of the boat together, the material chosen must be “less noble” than silicon bronze so that, in the presence of seawater and stray current, the shaft log will not cause degradation of the silicon bronze bolts that are structural to the boat.

This combo of requirements is making it darn near impossible to find schedule 40 pipe for the shaft log. I’ve found copper-nickel, but it is more noble than silicon bronze. I can’t seem to find Tobin Bronze in the right size pipe anywhere. Nor can I find silicon bronze schedule 40 pipe. Onwards, more shopping on the internet for this stuff!

Below is a “galvanic series” chart which shows the various alloys and their position in the series. Those alloys to the left of silicon bronze will cause the silicon bronze to degrade in the presence of seawater and stray electrical current; those alloys to the right will not…instead the shaft log will degrade in the seawater/current situation. The shaft log is much easier to get at and replace than the very long bolts that go around each side of the shaft log.

If the pic below is cut off, you can go here to this link to see the series and more information.

galvanic series

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