Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-06-2013, 11:06   #61
Registered User

Join Date: Apr 2013
Location: Miami, FL
Boat: Formula 45 Yacht
Posts: 7
Meant 'knocked my wife off the BOW...not now! !
__________________

__________________
mvelotas is offline   Reply With Quote
Old 01-06-2013, 11:06   #62
Senior Cruiser
 
Kenomac's Avatar

Cruisers Forum Supporter

Join Date: Jan 2012
Location: Somewhere in the Adriatic Sea
Boat: Oyster 53 Cutter
Posts: 8,516
Re: Best Overall Anchor for 50' powerboats

Buy the Quickline Ultra Anchor. I just fitted a 45kg with swivel to the roller on our boat, it looks awesome. Bigger, shinier, sharper and more bad-ass than in pictures and works just like the company says it should.

I've used Rocna, Danforth and CQR quite a bit in the past. Still have the Lewmar CQR and a Fortress 55 for kedging.
__________________

__________________
Kenomac is offline   Reply With Quote
Old 02-06-2013, 06:09   #63
Registered User

Join Date: Apr 2013
Location: Miami, FL
Boat: Formula 45 Yacht
Posts: 7
After re-reading threads, noticed I didn't reply to Suijin's question about my line vs chain. I'm all chain. I misspoke by saying "rode". But again, this Spade is great....knock on wood! (Or Fiberglas!)
__________________
mvelotas is offline   Reply With Quote
Old 03-06-2013, 16:15   #64
Registered User

Join Date: May 2013
Location: Jupiter, Florida
Boat: Mainship 2004 34Trawler
Posts: 6
Re: Best Overall Anchor for 50' powerboats

Just went from the Fortress to the Rocna. What a difference! When you shift with wind and tide you might have a problem with the Fortress type.
__________________
bluewater1953 is offline   Reply With Quote
Old 04-06-2013, 07:08   #65
Sponsoring Vendor
 
Fortress's Avatar

Community Sponsor

Join Date: Jun 2009
Posts: 411
Re: Best Overall Anchor for 50' powerboats

Quote:
Originally Posted by bluewater1953 View Post
Just went from the Fortress to the Rocna. What a difference! When you shift with wind and tide you might have a problem with the Fortress type.
That would depend, of course, on the anchor model and bottom type. There are certainly sea bottom conditions (ex. harder soils) where a denser anchor with a narrow single fluke will have an advantage over a larger, two fluke design. In softer soils, where an anchor can penetrate more easily, the larger surface area of two fluke offers a huge holding power advantage.

To illustrate this point, there are three holding power tests that I can immediately think of (West Marine-USA, Voile-France, Pakryss-Sweden) which were conducted in softer soils whereby a Fortress out-performed much heavier steel anchors, including the Rocna.

Regarding the wind & tidal shift and re-setting issue, I have posted this before: It is our firm contention that a properly set Fortress anchor, with its two massive precision-machined and sharpened flukes, is not more likely to break free from a sea bottom during a wind or tidal shift than other anchor types, particularly those with far less surface / resistance area.

This contention is based upon the opinion of a 40+ year US Navy soil mechanics and anchor design expert, the 25 years of testimonials we have heard from Fortress owners all over the world, particularly from those in our hurricane region here in south Florida, as well as from independent test results (Practical Sailor, Sailing Foundation).

All of that noted, we will readily acknowledge that sailboats oftentimes do not have the engine power to back down hard enough on the more massive Fortress anchor to bury it deeply, and therein lies a key issue in how it performs (or not) during off-center loads.

Here's an interesting comment from the Sailing Foundation test, after they put 4,000 lbs of load on a 24 lb Fortress in straight line, 90, and 180 directions which illustrates this point:

The Fortress set so deep that the rode had to be hauled in to 1:1 and significant power applied to rode by the 83,000-pound tug to break it free. It is doubtful that a sailboat would have windlass power to break it out. Perhaps large primary winches or a rising tide might be adequate. However, it is also doubtful that a sailboat could have set the anchor that deep in less than a full hurricane.

So for a sailboat, the Fortress anchor would certainly serve you well as a storm anchor when the wind force and load are expected to be extreme, and the anchor will be buried deeply as it is designed.

Safe boating,
Brian
Fortress is offline   Reply With Quote
Old 04-06-2013, 07:33   #66
Registered User

Join Date: Feb 2008
Posts: 2,062
Re: Best Overall Anchor for 50' powerboats

Brian-- the Fortress is a great anchor, but I have had the experience that any Danforth-style anchor (such as a Fortress) can be broken out in a wind shift and fail to reset. All it takes is a clump of mud or a rock/weed or shell to get caught between the flukes and shaft, and if the anchor flips it's as useless as a paperweight. Seen it many times and helped rescue a boat following a wind shift that went adrift with its Fortress anchor on the bottom. It came up with a clump of weed.

Your acknowledgements above about deep set are duly noted, as is the effectiveness of your design when well set. Real world IMHO is that the Fortress is best as a kedge, as a lightweight secondary, or as a storm anchor when anchor(s) can be set in the direction of the predicted wind, and in the direction of anticipated change.
__________________
SailFastTri is offline   Reply With Quote
Old 04-06-2013, 07:54   #67
Sponsoring Vendor
 
Fortress's Avatar

Community Sponsor

Join Date: Jun 2009
Posts: 411
Re: Best Overall Anchor for 50' powerboats

SailFastTri - thanks for your kind words about our product.

Our company founder/owner, who was a lifelong and very adventurous boater with a 1,000 mile trip up the Amazon River, several Atlantic crossings, and a circumnavigation on his resume, said that "once an anchor breaks free from a sea bottom, it is oftentimes no longer an anchor....it is a massive ball with no remaining sharp edges in which to re-penetrate into the sea bottom".....and in this circumstance, re-setting is not possible."

This is one of the reasons why we note in our "Safe Anchoring Guide" literature that if you are expecting a wind or tidal shift, its a good idea to set two anchors for maximum safety.

Otherwise, a large heavy plow type might serve your sailboat better.

Much appreciated,
Brian
Fortress is offline   Reply With Quote
Old 04-06-2013, 08:10   #68
Registered User
 
Delfin's Avatar

Join Date: Aug 2010
Location: Anacortes, WA
Boat: 55' Romsdal
Posts: 1,390
Re: Best Overall Anchor for 50' powerboats

Properly set, I doubt there is any anchor available that surpasses a Fortress for holding power, but as noted, getting that proper set may be more challenging for small boats. When it is not challenging is when you start to worry about whether your primary anchor will hold because wind and wave are getting extreme. That is why we have always, and will always carry a Fortress (in our case Guardian) to serve as a backup hook and storm anchor that stows away out of sight until needed. It would seem to me to be prudent insurance for any cruising boat to carry one for those 'special occasions.'

Here in the PNW, the Coast Guard carries the Fortress for a reason. They have the power to set them, and once set, they will hold their vessels through most anything. I assume if it works for those vessels, it will work for me.
Attached Thumbnails
Click image for larger version

Name:	Cutter.jpg
Views:	57
Size:	200.5 KB
ID:	61863  
__________________

__________________
http://delfin.talkspot.com
When stupidity is a sufficient explanation, there is no need to appeal to another cause.
- Ulmann's Razor
Delfin is offline   Reply With Quote
Reply

Tags
anchor

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 02:34.


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.