Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 19-01-2012, 03:23   #1
Registered User

Join Date: Feb 2011
Location: London
Boat: Beneteau 47.7
Posts: 93
Beneteau first 47.7 Steering System

All
I am currently refitting my beneteau 47.7 and as you will all know who are familiar with this boat it uses spectra/vectran lines for steering cables, they are very annoying as they need tightening often and also they tend to fray after a period of time.
Has anyone had a conversion done on their boat to wire cable. I presume the pulleys would have to be replaced. I am awaiting a call back from beneteau around this as they might have a conversion kit available? Thought I would ask the question
Thanks
Nick
__________________

__________________
Tomtom39 is offline   Reply With Quote
Old 19-01-2012, 07:59   #2
Registered User
 
svHyLyte's Avatar

Join Date: Mar 2006
Location: Tampa Bay area, USA
Boat: Beneteau First 42
Posts: 3,434
Images: 25
Re: Beneteau first 47.7 steering system

Quote:
Originally Posted by Tomtom39 View Post
All
I am currently refitting my beneteau 47.7 and as you will all know who are familiar with this boat it uses spectra/vectran lines for steering cables, they are very annoying as they need tightening often and also they tend to fray after a period of time.
Has anyone had a conversion done on their boat to wire cable. I presume the pulleys would have to be replaced. I am awaiting a call back from beneteau around this as they might have a conversion kit available? Thought I would ask the question
Thanks
Nick
Nick--Where/how is the Vectran fraying? In theory there should be a fair lead from either end of the chains in the binnacle over smooth idler wheels to the quadrant. Is that not so?
__________________

__________________
"It is not so much for its beauty that the Sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
svHyLyte is offline   Reply With Quote
Old 19-01-2012, 08:28   #3
Registered User

Join Date: Feb 2011
Location: London
Boat: Beneteau 47.7
Posts: 93
Hey
Thanks for the response. On the beneteau there are no chains. Purely vectran line.
The vectran line has two eye bolts splice to the end which attaches to the quadrant. The line then heads away from the quadrant at horizontal level. It then passes through 2 heavy turning blocks making the line turn at right angles towards the binnacle! The vectran is then secured through the shaft of the wheel. When you turn the wheel the rope gathers on the shaft and turns the rudder.
These boats were designed for class racing so made light as possible hence the light and feeble design of the steering.
Fraying occurs due to the tension required on the vectran line to ensure that it stays on the pulleys!!!!
Thanks nick
__________________
Tomtom39 is offline   Reply With Quote
Old 19-01-2012, 09:18   #4
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 4,334
Re: Beneteau first 47.7 steering system

Where is the fraying occurring?? If it is where the lines run on the quadrant, then perhaps the quadrant has rough edges and/or has been moved up or down on the rudder shaft so that the lines rub. If it where the lines go through the turning blocks, maybe they are not aligned properly.
__________________
donradcliffe is offline   Reply With Quote
Old 19-01-2012, 09:44   #5
Registered User
 
svHyLyte's Avatar

Join Date: Mar 2006
Location: Tampa Bay area, USA
Boat: Beneteau First 42
Posts: 3,434
Images: 25
Re: Beneteau first 47.7 steering system

Quote:
Originally Posted by Tomtom39 View Post
Hey
...The vectran line has two eye bolts splice to the end which attaches to the quadrant. The line then heads away from the quadrant at horizontal level. It then passes through 2 heavy turning blocks making the line turn at right angles towards the binnacle! The vectran is then secured through the shaft of the wheel. When you turn the wheel the rope gathers on the shaft and turns the rudder.
... Fraying occurs due to the tension required on the vectran line to ensure that it stays on the pulleys!!!!
Thanks nick
Nick--

That doesn't make sense to me. The sheaves in the turning blocks should be rotating with even modest load (tension) on the Vectran and surely should if there is enough tension in the vectran to chafe the line, which should only happen if the sheaves are frozen and the line is simply sliding over them. As I don't know the construct of your system, I cannot offer much but based on our own (older) system I would suspect the sheaves should have either UHMPE or greased bronze bushings. If the bushings are worn they might allow the sheaves to shift out of alignment and "lock-up" giving rise to the chafe. In any case, I'd check the turning blocks carefully before looking at going to wire rope.

FWIW...
__________________
"It is not so much for its beauty that the Sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."
svHyLyte is offline   Reply With Quote
Old 19-01-2012, 13:32   #6
Registered User

Join Date: Feb 2011
Location: London
Boat: Beneteau 47.7
Posts: 93
Thanks for your response
I will check the turning blocks this weekend
Thanks
Nick
__________________

__________________
Tomtom39 is offline   Reply With Quote
Reply

Tags
beneteau

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
Multiplexing: Digital Switching, E-Plex, C-Zone - Have it? Install it? Your Opinion ? Katiusha Electrical: Batteries, Generators & Solar 23 07-02-2012 07:49
HELP ! - Jeanneau / Beneteau Gantry System bbbbbguy Deck hardware: Rigging, Sails & Hoisting 0 18-11-2011 10:18
For Sale: 2005 Beneteau 393 Oceanis - Loaded for Cruising capnbob5698 Classifieds Archive 2 14-09-2011 07:38
Route Properties, Missing Functions James Baines OpenCPN 13 13-07-2011 05:31



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 01:20.


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.