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Search took 0.03 seconds. Search: Posts Made By: Mark Johnson
Forum: Anchoring & Mooring 12-01-2024, 07:26
Replies: 45
Views: 5,167
Posted By Mark Johnson
Re: Anchoring equations

Read:
Anchoring and Mooring the Cruising Multihull. It is equally applicable to monohull's.
Forum: Construction, Maintenance & Refit 06-11-2023, 08:18
Replies: 45
Views: 6,661
Posted By Mark Johnson
Re: Hard Dodger Window Material

3/16" coated both sides polycarbonate. Leave 1/16" min all around for expansion.
Forum: Multihull Sailboats 27-10-2023, 12:23
Replies: 36
Views: 3,070
Posted By Mark Johnson
Re: PSS Failure on only one shaft

Put a zinc on the shaft as a stop. 10 years is the life of a bellows. Change it out.
Forum: Monohull Sailboats 18-09-2023, 07:55
Replies: 67
Views: 7,914
Posted By Mark Johnson
Re: 10 year standing rigging, why?

Fiber rigs are not 75% lighter than a standard rig, only the wire or rope portions are lighter. This is often misunderstood.
.
If a complete rig is 500# , (lights, Radome, and all), ...
Forum: Meets & Greets 07-07-2023, 09:11
Replies: 56
Views: 5,974
Posted By Mark Johnson
Re: ARE WE MAD? Embarking on a sailing adventure with zero experience

World Cruising safely and responsibly... takes years of experience, at sailing, reading the weather, first aid, boat repair, etiquette in other countries, anchoring, storms at sea, riding out...
Forum: Liveaboard's Forum 19-06-2023, 06:55
Replies: 70
Views: 6,381
Posted By Mark Johnson
Re: Severe pain, what would you do if single handing?

Single handing at sea, for more time than you can stay awake and on watch, is against International law, for a good reason. We must be on watch 24/7.

Otherwise, when a skipper is seasick, and...
Forum: Multihull Sailboats 12-06-2023, 08:12
Replies: 25
Views: 3,068
Posted By Mark Johnson
Re: Anchoring in Tidal Estuary With a Bridle

Read my book: MARK JOHNSON
"Anchoring and Mooring the Cruising Multihull", for specific techniques.
Available from Amazon in paperback or as an E Book.
Also... Outrigmedia.com
Forum: Deck hardware: Rigging, Sails & Hoisting 02-06-2023, 07:06
Replies: 58
Views: 6,657
Posted By Mark Johnson
Re: Dyneema Thermal Expansion - Enough to Break Things?

The issue is whether or not you have a tune sensitive rig. Dyneema does not expand or contract like SS wire does. It does so, but FAR less.
If your Dyneema rig is tuned perfectly for 90°F+, then...
Forum: Propellers & Drive Systems 22-05-2023, 13:27
Replies: 40
Views: 28,449
Posted By Mark Johnson
Re: Velox Plus prop antifoul paint

AS A TWO SEASON FOLLOWUP ON VELUX...
I maxed out the perfect prep, following instructions, calling the dealer with questions, etc. This Velux product on my drive train failed 100% within a month,...
Forum: Monohull Sailboats 14-04-2023, 09:46
Replies: 43
Views: 6,123
Posted By Mark Johnson
Re: Pros and Cons of folding props

The Flex O Fold, as I have used for 27 years, is massively built, and there are redundant safeties engineered in. If it is installed right, the odds of it losing parts is "0".

In fact... because...
Forum: Monohull Sailboats 14-04-2023, 09:12
Replies: 43
Views: 6,123
Posted By Mark Johnson
Re: Pros and Cons of folding props

On a fast boat, absolutely worth having a "folding" prop, like Flex O Fold.
These are geared, and in forward, more efficient than fixed. The additional maintenance is minimal.

On our triamran,...
Forum: Marine Electronics 30-12-2022, 07:03
Replies: 146
Views: 10,953
Posted By Mark Johnson
Re: Radar or AIS to rouse me when in a stupor?

This is, imo, a no brainer.
No technology relieves us of our ethical and legal requirement to stand watch 24/7. We all have the right to assess and take our own risks, but not to decide on the...
Forum: Powered Boats 19-12-2022, 08:02
Replies: 32
Views: 4,143
Posted By Mark Johnson
Re: Rio Dulce

I went to the Dry Tortugas to wait for best conditions. Then sailed for Cuba, staying "just" outside of their limits... and follow their coast around the end.
Then turn right for isla Mujeras, and...
Forum: Construction, Maintenance & Refit 21-11-2022, 18:09
Replies: 143
Views: 14,888
Posted By Mark Johnson
Re: Adding copper powder to antifouling

Don't do it! Been tried for 30 years, and none of the dozens of attempts worked well, if at all. Some attract hard growth because the coating conducts minute electricity, around the drive train....
Forum: Construction, Maintenance & Refit 14-10-2022, 10:53
Replies: 56
Views: 3,835
Posted By Mark Johnson
Re: Mast base flange. How to fit deck curvature?

This is the same for mounting hatches or anything flat, on a curved deck.

Make a FLAT 3/4” plywood mast base duplicate, and cover it with 3M 471 blue plastic tape, including up the edge, as a mold...
Forum: Construction, Maintenance & Refit 26-09-2022, 09:18
Replies: 39
Views: 2,841
Posted By Mark Johnson
Re: What can I spray a touch up job of 2 part linear polyurethane with?

If it is real LP like AwlGrip, (vs AwlCraft Acrylic) it can only be touched up if you picture frame it with masking and paper.

You can not polish out overspray, like with AwlCraft.
The shine is...
Forum: Multihull Sailboats 16-04-2022, 17:45
Replies: 4,969
Views: 1,264,861
Posted By Mark Johnson
Re: Trimaran - Especially Searunner - Owners

DEEP WATER ANCHORING:

I have been too busy building a house (myself) and re-fitting Delphys to write much these days, but was asked to post an addendum on deep water anchoring.
This is a short...
Forum: Fountaine Pajot 04-11-2021, 14:53
Replies: 15
Views: 6,343
Posted By Mark Johnson
Re: 3 blades folding props on a Volvo D1-30

The Flexofold in forward gear, is the most efficient prop made. Not so in reverse, but good enough.

While sailing, the Flexofold blades trail back so that they will not snag crab pots.
In...
Forum: Construction, Maintenance & Refit 04-10-2021, 07:04
Replies: 34
Views: 4,720
Posted By Mark Johnson
Re: Convert from solid drive shaft to u-joint

I sugest an Aquadrive CVA joint. Ours has worked perfectly for 25 years!

There is a thrust bearing to take the load, not the feet on the engine.
It has two U joints connected with a telescopic...
Forum: Propellers & Drive Systems 01-10-2021, 10:54
Replies: 40
Views: 28,449
Posted By Mark Johnson
Re: Velox Plus prop antifoul paint

I plan on using Trinidad on my Tri’s hills, and a Velox kit on the prop, shaft, and strut.

I have painted the SS rudder gudgeon and pintles in the past, using Petitts two part pink primer. It is...
Forum: Construction, Maintenance & Refit 23-09-2021, 15:30
Replies: 223
Views: 200,602
Posted By Mark Johnson
Re: What Is the Best Anti-Fouling Bottom Paint

Yep... tried carpet, plastic sheet, and 1" foam board, untill the turn at the bottom.
Forum: Construction, Maintenance & Refit 23-09-2021, 12:56
Replies: 223
Views: 200,602
Posted By Mark Johnson
Re: What Is the Best Anti-Fouling Bottom Paint

What is your other top pick?

Hmmm... so if Vivid sux, perhaps a compromise that gets around my compatibility problem is to use an ablative over the ablative already in my CB trunk, (because I can...
Forum: Construction, Maintenance & Refit 23-09-2021, 12:25
Replies: 223
Views: 200,602
Posted By Mark Johnson
Re: What Is the Best Anti-Fouling Bottom Paint

I could use ablative in the CB trunk only, and after 6 more weeks of sanding, go back to using Trinidad, everywhere else. I had geed enough results in the past, and ALWAYS go years between haul...
Forum: Construction, Maintenance & Refit 23-09-2021, 12:09
Replies: 223
Views: 200,602
Posted By Mark Johnson
Re: What Is the Best Anti-Fouling Bottom Paint

Bummer... we are on the hard now, in a 25th year refit, and removing decades of paint CAREFULLY, as our self built 34' Searunner wood/epoxy tri has no gel coat as a backup to the paint. We have not...
Forum: Construction, Maintenance & Refit 23-09-2021, 11:46
Replies: 223
Views: 200,602
Posted By Mark Johnson
Re: What Is the Best Anti-Fouling Bottom Paint

What is your opinion of Vivid?
Showing results 1 to 25 of 500
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