Spuddy
Active member
My boat has masthead rig with 2 forestays in tandem - fore and aft. I've borrowed a friends Loos gauge to play with and wonder what I should set this pair up to. Any suggestions ?
Tension on twin forestays
- Thread starter Spuddy
- Start date
VicS
Well-known member
You will find some instructions from our own Salty John HERE
But I would suggest that if the riiging is heavier than original then the figures used should be those for the original wire sizes.
Also take a look at the Selden Hints and advice manual
But I would suggest that if the riiging is heavier than original then the figures used should be those for the original wire sizes.
Also take a look at the Selden Hints and advice manual
sailorman
Well-known member
triangular plate hole in each corner
2 x forestays = length attached to 2 holes of the plate
1 x turnbuckle atached to the stem Hd & plate
tension turnbuckle as desired
2 x forestays = length attached to 2 holes of the plate
1 x turnbuckle atached to the stem Hd & plate
tension turnbuckle as desired
meldrum
New member
Thanks for that .I've got a cutter rigged yacht and have struggled trying to work out the best way for tensioning both correctly.As ive got her in the yard for a refit, i'll fit one before she's launched.
Spuddy
Active member
I'd already checked the Selden site and Sal ty John's adds only a little to the Loos info sheet. I don't want to fit a plate cos that could mean new forstays. Thanks for the good intentions but I could still do with some suggestions on how to calc the load on each.
VicS
Well-known member
Re: Tension on twin forestays *DELETED*
Post deleted by VicS
Post deleted by VicS
Spuddy
Active member
Not worth continuing - I'll ask a rigger.
VicS
Well-known member
[ QUOTE ]
Not worth continuing
[/ QUOTE ] Sorry about that!
Not worth continuing
[/ QUOTE ] Sorry about that!
Salty John
Active member
Start at 15% of the breaking strain of the wire and move up from there if you are experiencing excessive sag. Don't exceed 25%. The Loos guage booklet or the article on my site gives recommended starting settings for different wire diameters.
I'm assuming you have two forestays running to a single turnbuckle, in which case treat the stays as a single stay, if they are set up independently to separate turnbuckles it doesn't matter because the advice is the same, start at 15%.
I'm assuming you have two forestays running to a single turnbuckle, in which case treat the stays as a single stay, if they are set up independently to separate turnbuckles it doesn't matter because the advice is the same, start at 15%.
VicS
Well-known member
[ QUOTE ]
the article on my site gives recommended starting settings for different wire diameters.
[/ QUOTE ] That was what I referred to, quoted even, in my post, but you see the response it got so I deleted it.
He started by asking what they should be "set up to". I assumed he was asking what tension they should be tightened to, especially as he said he had borrowed a Loos gauge "to play with". Your site answers that question! Then he asks how to calculate the load on each!
God knows what the fellow is after, perhaps, because I don't!
the article on my site gives recommended starting settings for different wire diameters.
[/ QUOTE ] That was what I referred to, quoted even, in my post, but you see the response it got so I deleted it.
He started by asking what they should be "set up to". I assumed he was asking what tension they should be tightened to, especially as he said he had borrowed a Loos gauge "to play with". Your site answers that question! Then he asks how to calculate the load on each!
God knows what the fellow is after, perhaps, because I don't!
Spuddy
Active member
Well you're easily offended ! Far too many miserable old nit pickers on these forums now. I asked a question to which you gave links that didn't address it. Do me a favour and don't try to"help" in future.
BrendanS
Well-known member
VicS has been giving great advice on here for years. If you aren't getting the answers you need, then clarify your question, as Vic is not a nit picker.
sailorman
Well-known member
Them that can do, do /forums/images/graemlins/grin.gif
Thems that cant, teach /forums/images/graemlins/ooo.gif
Thems that cant, teach /forums/images/graemlins/ooo.gif
Colvic Watson
Well-known member
[ QUOTE ]
Far too many miserable old nit pickers on these forums now. I asked a question to which you gave links that didn't address it. Do me a favour and don't try to"help" in future.
[/ QUOTE ] Could any post be less in the spirit of the PBO forum?
Far too many miserable old nit pickers on these forums now. I asked a question to which you gave links that didn't address it. Do me a favour and don't try to"help" in future.
[/ QUOTE ] Could any post be less in the spirit of the PBO forum?
VicS
Well-known member
OK you already checked the Selden site, one that many people hold in high regard, and Salty John's site. I am not a clairvoyant so I could hardly have known that!
They appeared to answer the question you first asked and I attempted, in the now deleted post, to clarify a little further.
What did I get for my trouble "Not worth continuing".
I still do not understand quite what you are asking when you say "I could still do with some suggestions on how to calc the load on each." It seems a totally different question to the one you asked originally. What you need to know is surely the tension to set the rigging too using your borrowed Loos plaything. That's what it is for, what you appeared to ask and what is answered in the links given.
To calculate the loads imposed by the sails in various wind strengths while sailing is going to involve some fairly complex physics and maths and what use the results will be to you at the end if it I don't know. However if you feel you can get that level of help and understand it from your rigger good luck to you. We'll look forward to a detailed dissertation on the subject from you in due course.
Easily offended maybe, certainly upset by your attitude in this case.
And for the record I have always been a doer. I have never been a teacher!
They appeared to answer the question you first asked and I attempted, in the now deleted post, to clarify a little further.
What did I get for my trouble "Not worth continuing".
I still do not understand quite what you are asking when you say "I could still do with some suggestions on how to calc the load on each." It seems a totally different question to the one you asked originally. What you need to know is surely the tension to set the rigging too using your borrowed Loos plaything. That's what it is for, what you appeared to ask and what is answered in the links given.
To calculate the loads imposed by the sails in various wind strengths while sailing is going to involve some fairly complex physics and maths and what use the results will be to you at the end if it I don't know. However if you feel you can get that level of help and understand it from your rigger good luck to you. We'll look forward to a detailed dissertation on the subject from you in due course.
Easily offended maybe, certainly upset by your attitude in this case.
And for the record I have always been a doer. I have never been a teacher!
sailorman
Well-known member
[And for the recrd I have always been a doer. I have never been a teacher!]
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