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Forum: Multihull Sailboats 13-03-2021, 16:42
Replies: 247
Views: 34,255
Posted By leftbrainstuff
Re: 15M Catamaran Capsize off Portugal

Speed has zero correlation to the probability of hitting something in the ocean. Area of water traversed would, which is independent of speed.
Forum: Marine Electronics 31-12-2020, 22:44
Replies: 57
Views: 5,602
Posted By leftbrainstuff
Re: Standalone exterior Marine Cartplotter running Windows?

The reason most use some form of Linux operating system is twofold.

Firstly is cost. Using Windows incurs a licensing cost to Microsoft. Most Linux distros are free due to their open source...
Forum: Marine Electronics 21-11-2020, 14:49
Replies: 109
Views: 9,431
Posted By leftbrainstuff
Re: What else can be improved in the marine electronics space?

The marine recreational electronics industry has mostly pursued a 20th century proprietary business model. This has led to a small global market, barely $300M in revenue across all the major players....
Forum: Marine Electronics 18-11-2020, 14:30
Replies: 11
Views: 732
Posted By leftbrainstuff
Re: Transferring MMSI

With MMSI changes you have several things to consider

1) the MMSI stays with the boat. You need the previous owner to work with you on this as per...
Forum: Electrical: Batteries, Generators & Solar 07-09-2020, 15:26
Replies: 213
Views: 18,518
Posted By leftbrainstuff
Re: AGM Battery Failure - Two Sets in Two Years

Hard to diagnose with your narrative but root causes that will kill batts quick are:

1) Massive Frequent Discharge
2) Batt quality issue
3) Overcharge
4) Undercharge

Undercharge seems a...
Forum: Our Community 31-07-2020, 19:14
Replies: 109
Views: 7,286
Posted By leftbrainstuff
Re: New Boater - is it normal protocol for a marina to not cover damages from dock ha

No marina will accept liability. You are in a multi use place. They don't have any control over the condition of boats or the competence of people in the marina.

Plus boats manoeuvering in tight...
Forum: Weather | Gear, Reports and Resources 31-07-2020, 19:09
Replies: 5
Views: 453
Posted By leftbrainstuff
Re: Studying Super Storms & Comments

Few boats have the speed to outrun or avoid big fast moving storms.

These days forecasting of major systems is much better. We see roughly 1 day more predictability every decade.

Radar is...
Forum: Electrical: Batteries, Generators & Solar 30-07-2020, 17:11
Replies: 107
Views: 8,970
Posted By leftbrainstuff
Re: Could someone check my math please?

We ran Firefly Carbon Foam batts for several years. Twice the usable capacity than FLA because you can run them down very low. They don't sulfate so you can abuse them a lot.

The price per usable...
Forum: Electrical: Batteries, Generators & Solar 30-07-2020, 17:04
Replies: 107
Views: 8,970
Posted By leftbrainstuff
Re: Could someone check my math please?

Upping your alternator capacity is low risk and lets you choose when you make power.

Make sure you include some good monitoring. This will help you identify actual consumption, let you find and...
Forum: Electrical: Batteries, Generators & Solar 30-07-2020, 16:43
Replies: 110
Views: 12,783
Posted By leftbrainstuff
Re: New Generator or Lithium?

You can't beat cheap rigid solar panels. Cheap per Watt, super reliable and zero maintenance.

Those flexi, walk on, fold up panels either don't last or rarely perform as advertised. There are...
Forum: Electrical: Batteries, Generators & Solar 29-07-2020, 15:46
Replies: 107
Views: 8,970
Posted By leftbrainstuff
Re: Could someone check my math please?

We ran on and off shore power over seven years on the US West Coast from San Diego to the PNW. We had a wind gennie, diesel gennie and 55A and 125A alternators.

We updated from 240W of solar to...
Forum: Cruising News & Events 26-02-2020, 13:49
Replies: 19
Views: 3,174
Posted By leftbrainstuff
Re: Sailing Nandji

Yes.

Typical Aussie tenacity demonstrated by Yosh and Bonita.

I watch the handout of civil awards to snowflakes and wannabees each year on Australia day with disdain.

It's folks like these...
Forum: Cruising News & Events 26-02-2020, 13:45
Replies: 19
Views: 3,174
Posted By leftbrainstuff
Re: Sailing Nandji

+1

can't fault that wisdom
Forum: General Sailing Forum 08-02-2020, 10:43
Replies: 7
Views: 733
Posted By leftbrainstuff
Re: BOAT SHOW SAVINGS!!!!!!

Yeah. Boat shows have become useless for compinent deals in recent years. Probably still good for new boat deals sometimes.

We've also found that hardly any component suppliers bother attending. ...
Forum: Engines and Propulsion Systems 07-02-2020, 15:22
Replies: 87
Views: 7,368
Posted By leftbrainstuff
Re: Switched to Renewable Diesel!

It relies on access to many of the existing 135 refineries in the US, distributed storage and small scale refining on bases.

I remember a US DLA visit to Australia back in the norties where they...
Forum: Engines and Propulsion Systems 07-02-2020, 15:14
Replies: 87
Views: 7,368
Posted By leftbrainstuff
Re: Switched to Renewable Diesel!

For those hoping to sleep better at night after switching to bio diesel. I have bad news.

The latest CSIRO and AEMO report shows biomass as the most expensive form of energy based on levellised...
Forum: Engines and Propulsion Systems 06-02-2020, 15:41
Replies: 87
Views: 7,368
Posted By leftbrainstuff
Re: Switched to Renewable Diesel!

That's nice but frankly wrong. It requires much more energy to reprocess old oil than to refine new. So your embodied carbon footprint is higher

However recycling metals, ferrous and non ferrous,...
Forum: Engines and Propulsion Systems 06-02-2020, 15:39
Replies: 87
Views: 7,368
Posted By leftbrainstuff
Re: Switched to Renewable Diesel!

And any engine with the old style pintle injectors can run on just about any combustible oil. Modern diesels will not

We used to be able to run the detroit diesels on any oil. This allowed the...
Forum: Engines and Propulsion Systems 06-02-2020, 15:37
Replies: 87
Views: 7,368
Posted By leftbrainstuff
Re: Switched to Renewable Diesel!

Biodiesel or any form of recovered oil reformulated diesel is not better for the environment. That's marketing bs. But plenty of non technical folks sleep better at night because of their preceived...
Forum: Construction, Maintenance & Refit 30-01-2020, 21:55
Replies: 170
Views: 16,438
Posted By leftbrainstuff
Re: Seacock warning, probably most relevant to Australians

There is so much junk sold and fitted to boats it's a wonder more don't sink. There is also widespread ignorance of metal composition, corrosion and reliance on marketing bs.

I have a masters in...
Forum: Deck hardware: Rigging, Sails & Hoisting 13-01-2020, 13:16
Replies: 34
Views: 21,659
Posted By leftbrainstuff
Thumbs up Re: Sailrite Alternative

Hey Unbusted67,

We Have a SailriteŽ UltrafeedŽ LSZ‑1 PREMIUM (110V) Walking Foot Sewing Machine. Bought it less than 2 years ago and barely used it. In perfect condition. Love it, but we are in...
Forum: General Sailing Forum 04-01-2020, 09:42
Replies: 16
Views: 3,864
Posted By leftbrainstuff
Re: Re-floating the boat

You'll tear the masts, cleats out trying to right a flooded boat. Ever completed this type of salvage? There's a reason those who are successful understand the engineering and dynamics involved.
...
Forum: Construction, Maintenance & Refit 03-01-2020, 10:31
Replies: 336
Views: 19,708
Posted By leftbrainstuff
Re: Should standards that become a part of a law be free to the public?

Absolutely.

This has been a contentious issue in Australia where Standards Australia is a private company. Their ability to hide mandatory and safety critical standards behind expensive paywalls...
Forum: Electrical: Batteries, Generators & Solar 03-01-2020, 10:25
Replies: 33
Views: 4,963
Posted By leftbrainstuff
Re: The beauty of twist lock connectors...

The legacy shorepower connectors are truly horrible. These designs would barely achieve a 2 out of 10 in a first year engineering design assesment.

With over 1kW of solar and carbon foam...
Forum: Anchoring & Mooring 27-10-2019, 17:05
Replies: 73
Views: 5,999
Posted By leftbrainstuff
Re: Anchor chain stretch?

If you're stretching your chain then you are overloading it. A load greater than the yield strength and less than the utimate tensile strength will result in permanent deformation.

Measuring link...
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