Category Archives: Tech Talk

Still learning – drama off Oz east coast

After 7 years, and 10,000 sea miles, there are a few things I always wondered about Gray Matter – never expected to discover all of them in a period of 5 hours.   To name a few; how would Gray Matter handle dead in the water in 25 knots of wind, abeam to 4-6 foot waves; how about underway without stabilization; what is required to tow and with what tackle; and most importantly how to diagnose a fuel system puzzle while rolling 30 – 40 degrees abeam to a building sea state.

Underway down the east coast of Australia from Brisbane to Newcastle with following wind and sea, we experienced a main engine failure, leaving Gray Matter without the Naiad stabilizers.   We started the Wing Engine, which failed within 5 minutes.

The nature of the engine failures appeared similar to fuel contamination, with a slowing of RPM, loss of power then finally the “sounds of silence”.  So that was our working hypothesis.
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Suwarrow souvenir

As we mentioned we purchased a new tender in Tahiti – 14′ fiberglass center console boston whaler type boat. We had not done any sea miles with this boat in the cradle, so when we started to roll on our way to Suwarrow I noticed the tender had shifted in the cradle and was now resting against the rail of Gray Matter. I was able to secure the boat with a block and tackle we had from our sailboat (the same one we used to hoist the anchor in Mexico – handy thing to have onboard).

When we arrived Suwarrow I realized the stainless cradle support on the outboard side had broken. It looks like the weld failed on one support which caused the other weld to fail.


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Pacific Crossing Summary

We have a wifi internet connection, so we were able to review all the blog posts – thanks very much to our friends – we were definitely not alone out there.

To add some pictures and comments on the projects.

The solar project has been a great success. We are producing between 2.2 – 3.1 kwh per day – which is at the high end of our expectations. This will easily allow us to only need 1 hour of generator per day when at anchor.

Blower wiring project, we just post a picture of the 230v AC wiring – we had to sort our way through that maze to wire the port side blower to the inverter. We had a good instructor – Melt Emms from Raven Marine – available by email and sat phone when we need him.

Flopper stopper repair
Old version

New version

Another view – note the bird repellant at the end, which would be sticking up on top when flopper stopper is retracted.

Newly installed Bose speaker – and the 100ft sailboat that is our neighbor here in Nuku Hiva.

Trip Stats: Total distance: 2676 nautical miles, average speed: 7.5k, fuel burn: 3.5 gph, engine hours: 361, total fuel consumed: 1278 gallons, fuel remaining: 895.

Trip started from Isla San Benedicto, MX.

We saw this cargo ship (China – Peru) on Day 4, and she was the last ship we saw before landfall at Nuku Hiva.

Last sunset in the northern hemisphere.

Sunrise as we approach Nuku Hiva.

First sight of land after two weeks! Nuku Hiva, here we come.

We hooked a decent yellowfin tuna on the way in. Our biggest catch so far.

A very productive catch.

Dinner for weeks …

Just a few thoughts on the passage. We noted during the passage, we passed time by looking at the world cruising routes and contemplating some of the other places in the world to visit. The 2600 miles from North America to the Society Islands is one of the longest passages without landfall in the world. It would be an understatement to say we feel a sense of accomplishment to complete this passage with so little to worry about.

It’s a credit to Nordhavn’s voyaging under power philosophy in that two of us can take a 100 ton boat 2600 miles across one third of the Pacific Ocean. We were able to deal with the small mechanical issues, fix a few small things and arrive so rested we toured an extra 50 miles; caught and cleaned a 30lb tuna; anchored and didn’t even take a nap. I can honestly say the boat is as good if not better condition then when we left.

We truly feel we can go anywhere in the world we want, and look forward to many more adventures.

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Boat Yoga

Most cruising sailors find that the lifestyle affords a reasonable amount of exercise.  You don’t have a car, so you walk everywhere; you swim / dive – even fishing can be exercise when the fish gets to be 50lbs+.

This past week we discovered boat yoga. As we are staying here at Cabo to install the solar panels, we decided to knock down few projects ourselves. Foremost, the solar project requires wiring to be run from the upper aft deck of the pilothouse to the battery bank, which is in the forward bilge.  As the proud N62 owners, Christine and I felt up for the challenge.

For the engineers – we’re running the panels in series – so we will have high voltage and low amperage to the controller near the batteries, and then convert the voltage down and amperage up for charging near the batteries with the solar controller (Outback 80).  This is the most efficient way to get the volts / amps from the panels to the batteries.  We spec’d 10 AWG marine grade tinned wire for the project.

100 ft of wire should work.  We started the wiring from the middle – the electrical panel (just forward of the salon).

We identify two wires that go from the electrical panel to the batteries and decided to follow them .  Oh my, they go WHERE? We open up every cabinet to trace them down. With a coat hanger to lead the wire, we made it into the starboard guest cabin.

Cabinet below the electrical panel.

The next Cabinet aft.

The Cabinet in the storage locker.

Under the bed in the starboard guest cabin. Drilling was involved.

Now to the mid-bilge (this is a special place on the boat: holding tank, hot water heater. bilge pump, fresh water pump).  And yes on an N62 – it’s more than 6 feet deep from the floor.  I see the wires coming in – but they are hopelessly out of reach.  Christine attaches our valuable 140lb test monofilament fishing leader to the end of the cable – and feed in about 6 feet of leader.  One piece of it makes to where I was balancing between the lower edge of the holding tank and the lower edge of the water heater neck deep in the bilge.  Ok – a little push through the silicon seal between the mid-bilge and forward bilge to the batteries.   Three hours and we’re half done with about 10 feet of cable to spare.

Made it! – mid-bilge.

All the way to the batteries! – our trusty monofilament leader.

Lunch time – and phase 2.  We take the remaining 50 feet and feed it into the engine room with the other cables from the panel.  Following cables and the hose from the pilothouse toilet we feed the cable through the outboard side of the engine room storage cabinets.  This would be oh so easy if they hadn’t put an engine in the engine room, and filled up the storage cabinets – oh yeh – let’s put the hydraulic tank in front of one of the cabinets – humm – good place for the watermaker here in front of another cabinet.  After a grueling two hours we’ve run another 10 feet and we’re at the “base of the stack”.  Looks easy – everything runs up the conduit next to the exhaust stack.

We borrow the 20 foot “plumbers tape” – (a coiled wire gizmo) which should help us fish the wire up the stack conduit.

We slide it in the opening at the top of the stack in the pilothouse bunk room…

…feed about 10 feet in – where it’d go?  Ok let’s pull it out… what, it’s STUCK!!  You got to be kidding.  Two hours later no progress – time for Margaritas.

A strong cup of morning coffee encouraged another look in the stack access door in the salon – I can see the 20 feet of plumbers tape wrapped around the exhaust pipe of the engine at the top of the stack.  Ooooo – what’s that at the top of the stack housing – looks like a door.  Sure enough from the pilothouse aft outside locker there is a door – where the screws are still painted from the factory…

We pull the useless plumbers tape out (only an amateur would admit to the boatyard there tape was nearly lost) – it was hopeless tangled up.

We tied some fishing weights to the spool of 140lb test monofilament leader – Christine started feeding it down the stack conduit from the access door.  I was laying on my back jammed in behind the main engine – hugging the wing engine (it would be a lot easier without those engines in the way), I can hear weight leader coming down the stack – bonk, hits me in the face.  Done – 100 feet of wire run – we have about 10 feet to work with at the pilothouse deck – so 62 feet of boat takes 80 feet of wire.

We felt like we had just done 8 hours of body combat at the gym.

 

Other boat yoga practices include

  • Cleaning up the teak rails.

Before

after

 

  • Fixing the missing scupper door.

Before

Boat yoga pose

after

 

Anchor Challenge

Everytime we raise our 140 lb anchor and the 1/2″ chain – I say a silent thank you to the windlass (Maxwell HWC 3500) – that hydraulically-powered gizmo on the deck that raises and lowers the anchor. Having had a failure on our previous boat, I’ve always wondered what the backup plan should be if it fails. Two weeks ago in Bahia Los Frailles – it failed.
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