Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 08-02-2020, 09:32   #1
Registered User
 
zippy's Avatar

Join Date: Sep 2005
Location: Halifax, Nova Scotia
Boat: 2011 Hunter 50
Posts: 150
In-mast furled main bangs inside of mast

When a swell rocks our anchored boat at a certain harmonic, the mainsail that is furled on the Seldon mast will sometimes thump back an forth inside the mast. Is this normal or does something in the furling system need adjusting?
zippy is offline   Reply With Quote
Old 08-02-2020, 09:40   #2
Registered User

Join Date: May 2016
Location: The Med
Boat: Catalina 36 MKI
Posts: 189
Re: In-mast furled main bangs inside of mast

Quote:
Originally Posted by zippy View Post
When a swell rocks our anchored boat at a certain harmonic, the mainsail that is furled on the Seldon mast will sometimes thump back an forth inside the mast. Is this normal or does something in the furling system need adjusting?
Yes, you need to tension the furling rod inside the mast. It's easy, have a look at the manual or pdf on the Selden site
De.windhoos is offline   Reply With Quote
Old 08-02-2020, 09:45   #3
Registered User
 
capt_TE's Avatar

Join Date: Jan 2020
Location: Aboard s/y Aloha, now: Sweden, Västervik
Boat: Långedrag 43 ft (corten steel)
Posts: 37
Images: 3
Re: In-mast furled main bangs inside of mast

Exactly this happened on my rig as well. As De.windhoos says what you need to do is to tension it, it is probably just a bit loose. A detailed description how to do it is available on Seldens site for most of the models.
__________________
Work with nature - not against it!
capt_TE is offline   Reply With Quote
Old 08-02-2020, 10:47   #4
Registered User

Join Date: Aug 2016
Location: ABC's
Boat: Prout Snowgoose 35
Posts: 1,760
Re: In-mast furled main bangs inside of mast

Be aware that tensioning it, a bit like tensioning your genoa halyard may make it a little more difficult to furl and unfurl.
mikedefieslife is offline   Reply With Quote
Old 08-02-2020, 16:31   #5
Registered User
 
zippy's Avatar

Join Date: Sep 2005
Location: Halifax, Nova Scotia
Boat: 2011 Hunter 50
Posts: 150
Re: In-mast furled main bangs inside of mast

I will tension the furler a bit a see if that helps. The furling process has also been a bit touchy so maybe it will help with that also.
zippy is offline   Reply With Quote
Old 09-02-2020, 09:54   #6
Registered User

Join Date: Nov 2014
Boat: Hylas 54
Posts: 210
Re: In-mast furled main bangs inside of mast

In our Selden mast , when the mainsail is loaded it does not seem to bang. But when we take the mainsail off the furler for repairs or season storage the furler definitely bangs about inside the mast with the slightest bob of the boat. Very annoying. We have tried to stabilize the furler by running the halyard swivel half way up the spar and then using a line to pull the furler aft in the mast. This helps but the furler still moves laterally and makes noise, which reverberates right down the mast.

I am wondering if it needs tightening. But I think even if tensioned more it is still going to bang when there is no sail on the furler. Anyone have any ideas?
Hobiehobie is offline   Reply With Quote
Old 09-02-2020, 10:03   #7
Registered User

Join Date: Mar 2011
Location: Norway
Boat: 1998 Moody 40
Posts: 45
Re: In-mast furled main bangs inside of mast

Here is a good explanation of the procedure for tensioning the furling rod:


https://forums.sailboatowners.com/th...urling.175456/
SkipMark is offline   Reply With Quote
Old 09-02-2020, 11:06   #8
Registered User

Join Date: Oct 2017
Location: CPYC Erie, PA
Boat: Catalina 34ll 2001
Posts: 31
Re: In-mast furled main bangs inside of mast

Hobiehobie,
My Catalina 34 bangs terribly with the mainsail off. The PO used pipe foam, top one on the halyard with a tagline to bring down. I made from wood a t shaped piece to fit the sail opening, screwed a 1/4 inch plywood piece to keep in place, drilled 2 holes for a short length of 1/4 line, that went around the foil, held that in place with a lag screw and fender washer, eye bolts and lengths of line. Think I made 4, run them up with the halyard, each on a lines equally spaced to hold the foil in the mast with the 1/4 inch lines, It really is much simpler than my description. When not in use I keep it in a bucket with the top tied to one side and the bottom to the other. FWIW some Benitue owners just leave the main on all winter, their claim is that it's out of the sun and weather inside the mast, does seem to work.
cat34shamrock is offline   Reply With Quote
Old 09-02-2020, 12:15   #9
Registered User

Join Date: Nov 2014
Boat: Hylas 54
Posts: 210
Re: In-mast furled main bangs inside of mast

I got all paranoid after reading about how the fuller could undo its self if the locking screw is not fixed properly. So I just checked. My locking screw and sleeve are fine but presently with the mainsail off the foil is banging around as previously described. The Selden manual seems to suggest it is too loose if you can bang the fuller into the mast sides from pushing the foil from the top inspection hole. Which I can do. However as my set up is locked as the Selden qualified rigger intended (in 2019) I am loathe to make it tighter util I have put the main back up and tested how it does. My rationale for this is that my mast has a significant afterward bend in the top third of the mast, and thus making the fuller any tighter might actually cause the furling rod to sit too tight on the aft inside surface of the mast, particularly at the top. Maybe masts intended to have significant aftward flexion have to leave the fuller looser than masts that are straighter when rigged?
Hobiehobie is offline   Reply With Quote
Old 09-02-2020, 15:11   #10
Registered User

Join Date: Mar 2011
Location: Norway
Boat: 1998 Moody 40
Posts: 45
Re: In-mast furled main bangs inside of mast

Quote:
Originally Posted by cat34shamrock View Post
Hobiehobie,
My Catalina 34 bangs terribly with the mainsail off. The PO used pipe foam, top one on the halyard with a tagline to bring down. I made from wood a t shaped piece to fit the sail opening, screwed a 1/4 inch plywood piece to keep in place, drilled 2 holes for a short length of 1/4 line, that went around the foil, held that in place with a lag screw and fender washer, eye bolts and lengths of line. Think I made 4, run them up with the halyard, each on a lines equally spaced to hold the foil in the mast with the 1/4 inch lines, It really is much simpler than my description. When not in use I keep it in a bucket with the top tied to one side and the bottom to the other. FWIW some Benitue owners just leave the main on all winter, their claim is that it's out of the sun and weather inside the mast, does seem to work.

Hobiehobie, can you provide a photo or sketch of this rig?
SkipMark is offline   Reply With Quote
Old 09-02-2020, 16:27   #11
Registered User

Join Date: Sep 2009
Posts: 459
Re: In-mast furled main bangs inside of mast

Quote:
Originally Posted by Hobiehobie View Post

I am wondering if it needs tightening. But I think even if tensioned more it is still going to bang when there is no sail on the furler. Anyone have any ideas?

I hoist a old 3/4" line when the sail is removed, then spin the furler thereby spiraling the line like a candy cane stripe....you'll never hear it bang again.
Eder is offline   Reply With Quote
Old 10-02-2020, 08:25   #12
Registered User

Join Date: Jul 2012
Location: North East USA
Boat: 1975 Tartan 41'
Posts: 863
Re: In-mast furled main bangs inside of mast

After your main is furled in and the furling line secure, make sure you add a bit of tension to the outhaul. That should help stop some of the banging.
zstine is offline   Reply With Quote
Reply

Tags
mast

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Furled Sails Podcast unbusted67 Off Topic Forum 9 25-11-2013 15:02
"Reefing Point" for Roller Furled Headsail? rhumbunctious Deck hardware: Rigging, Sails & Hoisting 78 07-06-2012 08:54
Genoa Sheet Burns on Furled Staysail . . . What to Do ? ardoin Deck hardware: Rigging, Sails & Hoisting 28 21-09-2011 15:09
How to Keep Genny Furled & Run Jib on Forestay ? Whimsy Deck hardware: Rigging, Sails & Hoisting 2 11-12-2010 16:40
Volvo MS Bangs into Gear b-rad Propellers & Drive Systems 4 14-03-2010 20:20

Advertise Here


All times are GMT -7. The time now is 08:06.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.