Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 12-07-2016, 18:33   #1
Registered User
 
lindabarzini's Avatar

Join Date: Jan 2016
Posts: 140
Multihull bottoms

If one wanted to beach a multihull without scratching up the fiberglass on the bottom of the mini-keels, is there something that can be put on as a saftefy.

For example, there is Line-X paint. It looks really tough. I wonder if it would create much drag.

Some stainless steel runners made during manufacturing would be awesome.

Or if infrequently beaching a multihull, going in at high tide and jumping over and putting some towels or other protection beneath the hulls.

Any ideas for best way to beach a multihull?
__________________

__________________
lindabarzini is offline   Reply With Quote
Old 12-07-2016, 19:04   #2
Marine Service Provider
 
fstbttms's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 3,478
Re: Multihull bottoms

While the Line-X paint might not create much drag, the fouling it will allow to attach certainly will.
__________________

__________________
fstbttms is offline   Reply With Quote
Old 13-07-2016, 06:30   #3
Registered User

Join Date: Jan 2014
Location: Sydney, NSW
Posts: 585
Re: Multihull bottoms

One "best way" is to have beaching keels that have stainless bar along the bottom, as Lightwave cats had from 1996 and FreeFlow cats have now.

The main issue is you never know when a rock under the sand will punch a hole, there's a lot of force concentrated in a small area, more than most laminates can handle.

It also comes in handy when you manage to park it on the bricks. It's like having an excellent anchoring system (and using it properly), it's cheap insurance 👍


Sent from my iPad using Cruisers Sailing Forum
__________________
BigBeakie is offline   Reply With Quote
Old 13-07-2016, 10:24   #4
Registered User

Join Date: Nov 2010
Location: UK, Croatia
Boat: Fountaine Pajot Athena 11.6m Rapa Nui II
Posts: 341
Re: Multihull bottoms

Our previous boat was a FP Maldives 32ft LOA with low aspect ratio keels. It was moored on a half tide swinging mooring for 7 months a year in a fairly exposed location, taking and lifting from the bottom 4 times a day. The bottom was mud, gravel and the odd brick and rubble. Did that for 11 years or so. Initially, I planned to put SS shoes on the bottom of the keels, but decided that as there was so little wear on the keel bottoms, it wasn't worth it. The keels were foam filled grp, nothing special.
For the occasional deliberate grounding in controlled and presumably benign conditions, I see no reason to do anything other than be careful. Of more concern to me would be taking the ground on a hard substrate such as sand. Even in apparently sheltered locations, any wave or swell action can cause considerable pounding for a sustained period during liftoff and landing which can easily be damaging.
The difference on our mooring was that the substrate was reasonably soft such that you could not feel taking or taking off the ground, sometimes with embarrassing results when you realise you have to negotiate 50m of mud to get ashore.
__________________
Rapanui is online now   Reply With Quote
Old 13-07-2016, 16:15   #5
Registered User

Join Date: Mar 2009
Location: Southern Chesapeake Bay
Boat: Norseman 430, Jabberwock
Posts: 662
Re: Multihull bottoms

Maybe copper instead of SS?

I've blocked mine on 2X4 trim blocks, although, that they would float made it difficult.
__________________
ggray is offline   Reply With Quote
Old 13-07-2016, 17:14   #6
Senior Cruiser
 
44'cruisingcat's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 7,029
Images: 69
Re: Multihull bottoms

Be selective about where you beach the boat. We probably spend about 2 months per year in anchorages where we'll dry out. We always look for clean sand or sand/mud. No problems so far.
__________________

__________________
"You CANNOT be serious!"


John McEnroe
44'cruisingcat is online now   Reply With Quote
Reply

Tags
hull, multihull

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How often do epoxy barrier coats have to be put on bottoms videorov General Sailing Forum 8 12-03-2013 03:45
Balsa-Cored Bottoms Joe S Multihull Sailboats 53 21-09-2010 18:50
Fiberglass bottoms and divers Jack Long Monohull Sailboats 11 10-04-2008 15:32


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 01:03.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.