Anchor size and type for F36

This forum is for comments and the exchange of information relating to Trojan Boats and boating. Please do not post used parts or boats For Sale in this area. For general, non-boating topics please use our "General Discussions" section.

Note: Negative or inflammatory postings will not be tolerated.

Moderators: BeaconMarineBob, Moderator, BeaconMarineDon

User avatar
Struts and Rudders
Sporadic User
Posts: 182
Joined: Thu Dec 30, 2010 11:34 pm

Anchor size and type for F36

Post by Struts and Rudders »

Hello all,
I have purchased my windless,pulpit and anchor chute.
Can someone with practical experience provide me with a recommendation on anchor weight and style that works.
We intend to do quite a bit of on the hook time so holding power will be very important.
Thank you,
SRD
F36
User avatar
captainmaniac
2025 Gold Support
2025 Gold Support
Posts: 1922
Joined: Sat Apr 30, 2005 10:26 pm
Location: Burlington, Ontario

Post by captainmaniac »

Anchor style required depends on the type of bottom you will be trying to anchor over. If there are a lot of different bottom types, you may need to carry 2 or more anchors and use the right one based on bottom.

West Marine has an 'advisor' that explains a bit further. http://www.westmarine.com/webapp/wcs/st ... ght-Anchor

Not sure for the weight of an F36, but for my F32 (and typical bottom type) I use a 13lb Danforth. Typical wave, wind, or current conditions for your area may also dictate that you go bigger on the anchor to improve holding power against the additional forces.
User avatar
prowlersfish
2025 Gold Support
2025 Gold Support
Posts: 12723
Joined: Sat Nov 05, 2005 6:56 pm
Location: Lower Chesapeake Bay ,Va

Post by prowlersfish »

16lb Danforth works well for me
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
User avatar
aweimer
Moderate User
Posts: 290
Joined: Tue Sep 15, 2009 9:01 pm
Location: Chciago, IL

Post by aweimer »

prowlersfish wrote:16lb Danforth works well for me
I've got a 25lb on mine. Would hold a cruise ship it seems. ZERO issues holding, so hard that i have to pull it out with the engines at times.
Aaron
____________________________
1975 36' Tri Cabin
"Keep it up!"
E-Mail : aweimer@comcast.net
Lake Erie, OH
http://s1099.photobucket.com/albums/g39 ... 20It%20Up/
rossjo
Ultimate User
Posts: 2799
Joined: Tue Nov 08, 2005 2:48 pm
Location: Charleston, SC
Contact:

Post by rossjo »

I have Fortresses on 3 different boats. I bought 1 size oversize on all 3, and have plenty of chain ... works well with the mud palms in our Carolina pluff mud.
Captain Ross, 2009 Trojan Boater of the Year
"Viva Mahia" F32 Cummins 6BTA diesels,
"Mack Attack" Chaparral 244 Fish, SeaPro 180, McKee 14, Montauk-17
Image
User avatar
Struts and Rudders
Sporadic User
Posts: 182
Joined: Thu Dec 30, 2010 11:34 pm

Post by Struts and Rudders »

I found this and could not resist the deal.
This will be my primary anchor and will also have a 12 danforth on deck as a secondary.
Thanks
SRD
F36

http://www.defender.com/product.jsp?pat ... Id=3332233
User avatar
ready123
Ultimate User
Posts: 1841
Joined: Sat Nov 08, 2008 5:53 pm
Location: Mactier, Ontario Canada
Contact:

Post by ready123 »

Struts and Rudders wrote:I found this and could not resist the deal.
This will be my primary anchor and will also have a 12 danforth on deck as a secondary.
Thanks
SRD
F36

http://www.defender.com/product.jsp?pat ... Id=3332233
You will be more than happy with that anchor. I have used Bruce/claw style anchors for years and always sleep well on the hook..... just make sure to back down on the set and you will too. :)
Michael
Rum is the reason Pirate's have never ruled the world
Done Dreamin'
1987 President 43' Twin Lehman 225SP Turbo
Highfield 310 Ally 15 HP Yamaha 2cycle
1978 F32 Sedan twin 318 Chry SOLD
Safe Cove Marina, Port Charlotte, FL
jimbo36
Moderate User
Posts: 602
Joined: Mon Apr 21, 2008 9:20 pm
Location: Belleville, Ontario

Post by jimbo36 »

I agree with ready123, I have the same size on my F36. But, I couldn't resist the Stainless steel one. This type of anchor holds well in mud, ooze, weeds, sand but don't try anchoring in rocks with any style anchor, except a grapnel for lunch. 8)
rossjo
Ultimate User
Posts: 2799
Joined: Tue Nov 08, 2005 2:48 pm
Location: Charleston, SC
Contact:

Post by rossjo »

SRD,

You didn't say where you plan to anchor, but I seem to remember you're up near Myrtle Beach. In South Carolina, we anchor inshore in mud:
captainmaniac wrote: West Marine has an 'advisor' that explains a bit further. http://www.westmarine.com/webapp/wcs/st ... ght-Anchor
West Marine's 'Selecting the Right Anchor' wrote: Assessing Bottom Conditions

Anchors need to develop enough resistance in the seabed to withstand the environmental forces on the boat—the wind and the waves. An anchor’s ability to develop resistance is entirely dependent on its ability to engage and penetrate the seabed. In all of our anchor tests, including our biggest and best documented 2006 program, there always seems to be one undeniable conclusion: the selection of a suitable bottom for anchoring is a much more critical factor than the design of the anchor. So how do you choose the right anchor design? You must take expected bottom conditions into account. Here is an analysis of potential options, based on the seabed:

Sand: Fine-grained sand is relatively easy for anchors to penetrate and offers consistently high holding power and repeatable results. Most anchors will hold the greatest tension in hard sand. Pivoting-fluke anchors and non-hinged scoop anchors are the best types in sand. The Rocna performed excellently in our anchor tests in sand.

Mud: Mud has low shear strength, and requires anchor designs with a broader shank–fluke angle and greater fluke area. This allows the anchor to penetrate deeply to where the mud has greater sheer strength. Mud is frequently only a thin layer over some other material, so anchors that can penetrate through the mud to the underlying material will hold more. Fortress anchors have greater holding power in mud because they can be adjusted from their standard 32° to a broad 45° fluke angle.


Rock and Coral: Holding power is most dependent on where you happen to drop the hook, rather than the type of anchor. Plow-shaped or grapnel-type anchors, with high structural strength to sustain the high point-loads, generally work the best. These anchors include the Claw, CQR, Delta, Rocna and Supreme.

Shale, clay, and grassy bottoms: Tough bottoms for all anchor designs, with the weight of the anchor, more than the design the most important factor in penetration and holding power. CQR, Delta, Rocna and Supreme anchors are thought to be good due to their ability to penetrate the vegetation. However, these conditions have a high probability of false setting, due to the anchor catching on roots and protrusions, rather than something solid.
The Fortress excels in MUD, where the Bruce (or Lewmar in your case) is the weakest because it cannot penetrate deep enough into the mud to hold:
Image
Pull: 280lb, 440lb, 725lb, 725lb, 734lb, 2,175lb

San Francisco Bay, CA, April 1990
http://www.fortressanchors.com/AnchorTestMud.html

Here are all the Fortress test in various bottoms:
http://www.fortressanchors.com/anchor_tests.html

Verified by E. S. Maloney, author of “Chapman Piloting, Seamanship & Small Handling”, (often called “The Boater's Bible”).
Captain Ross, 2009 Trojan Boater of the Year
"Viva Mahia" F32 Cummins 6BTA diesels,
"Mack Attack" Chaparral 244 Fish, SeaPro 180, McKee 14, Montauk-17
Image
User avatar
Struts and Rudders
Sporadic User
Posts: 182
Joined: Thu Dec 30, 2010 11:34 pm

Post by Struts and Rudders »

Thanks for everyone's input.
Sounds like you need one of each style to be covered completely.
We're going to travel and hope to encounter all types of bottoms (LoL)
I hope between the claw and danforth we will be happy on the hook.
We tend to drop two anchors even our 22' MasterCraft at the lake, so I imagine that trend will continue.
Our windless has a capstan too so handling two anchors will be no issue.
Thanks to all who responded to this thread.
SRD
F36
User avatar
ready123
Ultimate User
Posts: 1841
Joined: Sat Nov 08, 2008 5:53 pm
Location: Mactier, Ontario Canada
Contact:

Using two anchors?

Post by ready123 »

Struts and Rudders wrote:We tend to drop two anchors even our 22' MasterCraft at the lake, so I imagine that trend will continue.
Ooooh an opportunity for the good old two anchor discussion :!: :wink:

I am not a believer in two anchor deployment generally unless under specific conditions, and especially not with different types.
Which anchor is doing the holding? When the load moves from one to another what happens? Any chance this on and off loading will tend to loosen the anchor's hold :?:

Now I do accept the theory of deploying two ahead @ 45 degrees while in strong wind situations (though I prefer to add scope on my single Bruce) and also the Bahama style, which each usage tends to maintain constant load on both, or one then the other.

When we are done here we can move on to multiple anchors when rafting 4 or 5 boats :twisted:

Can you tell the Admiral and I are in full retirement and living aboard with time on our hands :?: :?:
On the Tennessee river for the next 6 months then on to FL and the Bahamas before returning to Ontario for Summer 2013 then do it all over again and again :D
Michael
Rum is the reason Pirate's have never ruled the world
Done Dreamin'
1987 President 43' Twin Lehman 225SP Turbo
Highfield 310 Ally 15 HP Yamaha 2cycle
1978 F32 Sedan twin 318 Chry SOLD
Safe Cove Marina, Port Charlotte, FL
rossjo
Ultimate User
Posts: 2799
Joined: Tue Nov 08, 2005 2:48 pm
Location: Charleston, SC
Contact:

Post by rossjo »

The most difficult part of staying on the hook more than 3-4 hours is tidal change.

Our tides here have a 6' range. Its less in S FL and the Bahamas, but can really be much worse up north.

I've never come loose at night, but I never sleep well on the hook.
Captain Ross, 2009 Trojan Boater of the Year
"Viva Mahia" F32 Cummins 6BTA diesels,
"Mack Attack" Chaparral 244 Fish, SeaPro 180, McKee 14, Montauk-17
Image
User avatar
alexander38
Ultimate User
Posts: 3179
Joined: Sat Sep 27, 2008 6:48 am

Post by alexander38 »

I've been using a Delta in the bay since we got a big boat, and the only time I ever had trouble with it holding was in Urbanna on a short road.....

ran a ground once :roll: and it dug in so good that I was afraid pulling anymore on it I thought it was going to rip my Goode wench off the bow...and I've got a witness...and Jeff now owns that detla..witch is for a 41' boat...I went with a S/S for a 58' 35 lbs I think...on 30' of chain and 5/8" road..
Carver 3607 ACMY 454's Merc's
10' Dinghy 6hp Merc.
La Dolce Vita
Let's hit the water !

http://s852.beta.photobucket.com/user/t ... 8/library/
rossjo
Ultimate User
Posts: 2799
Joined: Tue Nov 08, 2005 2:48 pm
Location: Charleston, SC
Contact:

Post by rossjo »

Ruined a big Danforth at the Jetties once. Brought her home, but she's bent beyond use and I don't have a big enough press to straighten her out (I've left plenty more out the with smaller craft).

I don't send the Fortress down when there are rocks.
Captain Ross, 2009 Trojan Boater of the Year
"Viva Mahia" F32 Cummins 6BTA diesels,
"Mack Attack" Chaparral 244 Fish, SeaPro 180, McKee 14, Montauk-17
Image
User avatar
DOUBLE R
Sporadic User
Posts: 120
Joined: Wed Mar 21, 2012 6:28 pm
Location: ORANGE PARK, FLORIDA

Post by DOUBLE R »

Down here we mostly have sand. My F26 had a 10lber and 12 foot of 3/8 chain and would drag a bit in seas. My 20 footer has a Hooker 13lb (danforth style) with 6 foot of chain and it does not budge an inch! I have seen both first hand while diving as we always go up and down on the anchor line. Yesterday, I actually dropped the anchor in the same hole in the wreck that i managed to foul hook a few weeks ago. What are the chances!!!

Oh and we did 24 knots out and back at 5.4 gph burn!!!
MY CURENT FLEET

2003 KEY WEST 2020 WA
1978 ASHCRAFT 14' SKIFF
Image
Post Reply