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Sail & Rigging - Rig tuning for swan 47
12 June 2022 - 07:06
#1
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rostape1
Join Date: 01 December 2019
Posts: 13

Rig tuning for swan 47

Hi,

 

Could somebody point me to a rig tuning guide for the 47?

When sailing in 20kn of wind to windwards the leeward wires look a bit slack, specially when I put pressure on the backstay.  the mast appears straight, though it is likely bending to the side.

I'm trying to figure out the correct tension for the rig and how to set it up properly.

 

 

Peter

47/014

 

 

 

 
12 June 2022 - 11:39
#2
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matteosalamon
Join Date: 29 January 2007
Posts: 962

Dear Peter,

this is a job for a rigger, anyway I will try to explain how it should be performed, +/-:

(I imagine you have the original setup, which for the S&S Swan 47 is: V1-V2/D3 Rod rigging, D1-D1 / D2 1x19 (or dyform).)

First of all you have to check the mast rake is correct, this is very important (to check: get a   weight of about 20 kg. attached at the end of your main halyard. The distance of that halyard should be about cm. 30 (even 35) at mast base, from mast base).

Then, with same halyard and a weight attached at the bottom, you have to check the top of the mast is absolutely straight (same distance from toerail, port/starboard).

At that point (D2 must be completely slack) you should tight V1-V2/D3, first by hand then a couple of more turn with a wrench. When you have finished, tighten D2, not too much.  At last tighten D1aft-D1front.

Yes, with 20/25 kn leeward are a bit slack, just a bit. This is why it is very important you must not forget to get the pins in your turnbuckles.

I repeat, a job for a rigger, but hope this helps!

Fair winds,

matteo (47/069 Vanessa)
13 June 2022 - 17:35
#3
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rostape1
Join Date: 01 December 2019
Posts: 13

Hi,

 

Thanks so much, this is helpful. I had a rigger set up the rig, but wanted to check it myself as well.

When measuring the rake - is the back stay supposed to be on? or Are we talking mast rake without back stay?

 

 

/Peter
14 June 2022 - 06:32
#4
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matteosalamon
Join Date: 29 January 2007
Posts: 962

Dear Peter,

forestay and back stay slack, and you set the mast rake adjusting them both and screw at mast base.

Fair winds,

matteo (47/067 Vanessa)
15 June 2022 - 02:19
#5
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rostape1
Join Date: 01 December 2019
Posts: 13

Thank you Matteo!

 

I will try the measurement next time I'm back at the boat.

Beautiful mast base you have there! I whish mine looked like that. Will have to repaint it next time the mast is out!

 

/Peter
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