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02-18-2016, 11:05 AM
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#1
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Senior Member
City: Blaine
Vessel Name: Slow Bells
Vessel Model: Marine Trader 38
Join Date: Nov 2013
Posts: 327
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question: backing down on an anchor
I was enjoying a book recently on trawler cruising, when I was surprised to read that the author gradually went all the way up to 2000 rpm when backing down on an anchor. I don't think I've ever gone over 1200 rpm. How hard do you back down on your anchor?
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02-18-2016, 11:16 AM
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#2
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Guru
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48 (sold)
Join Date: Apr 2008
Posts: 10,185
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Unless your vessel is going to stay with the same heading as when you backed down I see no reason to do it beyond a fast idle. I have frequently seen 360 degree swings in two tide changes with variable winds.
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02-18-2016, 11:38 AM
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#3
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,143
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The reasoning of high power back down would be if you expected a blow and were unsure of the bottom.
We all have had false sets where the anchor caught yet really wasn't set...only one way to find out..or wait and see.
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02-18-2016, 11:59 AM
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#4
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Guru
City: LI or Fla
Join Date: Jul 2013
Posts: 1,148
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I think it also depends on the boat/hp/prop's. Sail boater will back down hard, yet the props are small and the HP low, do that in a sport-fisherman and you will always pull out the anchor, so as others have said it depends on the type of boat etc you have.
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02-18-2016, 01:02 PM
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#5
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Guru
Join Date: Jun 2008
Posts: 5,036
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I use a high idle, maybe 1200 rpm.
With my "ex" boat, I used to do the same, but after I repowered (with more HP) I kept pulling the anchor out. I had to change to idle speed only.
__________________
Jay Leonard
Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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02-18-2016, 01:17 PM
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#6
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Guru
Join Date: Apr 2014
Posts: 1,288
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With 660 Hp I back gently until chain goes straight. If I expect harsh weather I will re test later at moderate RPM. I use Spade type deep digging anchors and have had no issues with the gentile approach. In the past with other anchors I had more issues with increased wind especially big wind shifts. I believe a higher power back down can shock load your bow gear anchor and chain and it is not necessary.
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02-18-2016, 02:59 PM
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#7
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TF Site Team
City: California Delta
Vessel Name: FlyWright
Vessel Model: 1977 Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 13,728
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I back down with one engine engaged at idle, then bump it to 1000-1200 RPM in a short burst after we've stopped to check it. Doing this with 2 engines is too much on my boat. I'll alternate engines as needed when I back down to keep my track straight.
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02-18-2016, 03:05 PM
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#8
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,143
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Does anyone really think people go out there and use 500hp or more and a clean and jerk to set their anchors?
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02-18-2016, 03:24 PM
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#9
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Guru
City: Adelaide
Vessel Name: Kokanee
Vessel Model: Cuddles 30 Pilot House Motor Sailer
Join Date: Jul 2012
Posts: 3,218
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Quote:
Originally Posted by seattleboatguy
author gradually went all the way up to 2000 rpm when backing down on an anchor.
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That's what I do if the wind is expected to come up during the night in the current direction.
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02-18-2016, 03:25 PM
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#10
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Guru
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48 (sold)
Join Date: Apr 2008
Posts: 10,185
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Quote:
Originally Posted by psneeld
Does anyone really think people go out there and use 500hp or more and a clean and jerk to set their anchors?
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Based upon the responses so far, no. But as the OP asked, is 2000 RPM necessary? in some vessels that may be 500 HP or more HP in a clean and jerk.
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02-18-2016, 03:32 PM
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#11
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,143
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Quote:
Originally Posted by sunchaser
Based upon the responses so far, no. But as the OP asked, is 2000 RPM necessary? in some vessels that may be 500 HP or more HP in a clean and jerk.
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True...I would have just guessed that most would recognize the differences at 2000 rpm across the breadth of vessels....
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02-18-2016, 04:04 PM
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#12
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
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You don't need to back down if you have a Rocna.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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02-18-2016, 04:46 PM
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#13
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Guru
City: North Charleston, SC
Join Date: Sep 2010
Posts: 4,870
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I work the ground tackle and my wife operates the boat so I don't know how hard she backs down on the anchor. I'm sure it's not 2K RPM though. That would put us at seven knots.
2,000 RPM is different on different boats so it really has no meaning.
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02-18-2016, 04:46 PM
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#14
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Guru
City: North Charleston, SC
Join Date: Sep 2010
Posts: 4,870
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Quote:
Originally Posted by O C Diver
You don't need to back down if you have a Rocna.
Ted
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Just toss it overboard?
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02-18-2016, 05:57 PM
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#15
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
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Quote:
Originally Posted by WesK
Just toss it overboard?
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That's what I did 2 hours ago.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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02-18-2016, 06:20 PM
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#16
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Guru
Join Date: Apr 2014
Posts: 1,288
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Quote:
Originally Posted by psneeld
Does anyone really think people go out there and use 500hp or more and a clean and jerk to set their anchors?
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I have seen boats drag on multiple attempts to set when applying too much HP. I have wondered if they where charter boats. If you spend enough time and years hanging around anchorages you get to see some strange stuff. Not everybody out there knows what they are doing. I have always thought that sailors were better educated regarding how to use their boats and anchors. It is easy to buy a power boat turn the key and off you go not so with a sail boat. The lazy types shun sailing too much work and too much to learn. So the answer is yes maybe not a full 500 HP but much more than called for and I have seen boats pulled up abruptly on the anchor set and yes it is way wrong.
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02-18-2016, 06:39 PM
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#17
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 28,143
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Just measuring the audience...
And remember there others on here with some pretty extensive experience too....
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02-18-2016, 07:30 PM
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#18
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
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I use 1400rpm.
And I think setting is mostly an act of testing the bottom ....
The biggest variable in anchoring.
__________________
Eric
North Western Washington State USA
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02-19-2016, 12:10 AM
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#19
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TF Site Team
City: Saltspring Island
Vessel Name: Retreat
Vessel Model: C&L 44
Join Date: Nov 2007
Posts: 5,663
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I don't check the rpm. I check the anchor rode. When it is set, it is set, so I go to all stop.
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02-19-2016, 12:19 AM
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#20
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Guru
Join Date: Jan 2010
Posts: 1,181
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I back down at 12 to 1400 rpm. Any more than that I fear I would rip the cleats off the deck
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