Spi guys and sheets question :

Boo2

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How thick should they be ? Boat's a UFO 34 and before you ask how many square metres the spi is I don't know as I haven't had it out of the bag yet. Say average sized for the boat...

Thanks,

Boo2
 
As always - it depends! Shit hot racer, 8 or 10mm dyneema with cover stripped. If self-tailing winches, a suitable size. If doing it yourself rather than crew, something comfortable to handle. ... and you'll need much lighter light-weather versions as well. About £600 for twin guy/sheet and shackles set up!
 
Its all about what you can comfortably handle. 6mm dynema would do the job but I wounldnt want to be handling it - far too thin.

I use 12mm for the heavy sheets and 10mm for the light ones on my Starlight 35. The 12mm ones ( which are double ie guy and sheet on both sides) and with a steel snap shackle are too heavy to fly the spinny properly in less than 10kn true.
 
About £600 for twin guy/sheet and shackles set up!

Seems a lot ? UK Yacht Rigging Supplies has 100m of 12mm braid on braid for £96, see here and the same in 14mm dia for £150 odd. Are you talking dyneema ? I don't really think I need that for my purposes and might hardly use the spi at all in the end.

Boo2
 
if you need to know that you wont know how to set or fly one
imho of course :D

So do you think the OP should learn how to fly his kite using unsuitable sheets, and then ask, hoping you approve of his question?

This is a forum people ask questions, people answer them as best they can (mostly).
 
Also, if I may be permitted a supplementary question, can anyone tell me whether I should use the same sized sheets for my cruising chute (Butler Verner Coaster - again, I don't know the actual size) ?

Thanks,

Boo2
 
My Sadler 34 uses the same as Twister Ken and Bosun Higgs have suggested. Guys are 12 mm, sheets may be slightly less. I have a pair of 8 mm sheets for light winds but they rarely see daylight.

So would you use 10mm guys in light airs as Bosun Higgs suggests ?

Boo2
 
So would you use 10mm guys in light airs as Bosun Higgs suggests ?

Boo2

Light weather sheets can be skinny, because - although they'd be dreadful to handle if they were heavily loaded, they never are. I suspect the ones we used on a Swan 411 were about 5mm. When you really needed them, you could control them with just a pinch grip. If it got to the point where you needed to take a wrap around your hand to control them, it was time to change to the heavy (normal) sheet.
 
So would you use 10mm guys in light airs as Bosun Higgs suggests ?

Boo2

In theory I would use the 8 mm ones, or 10 mm if I had them. The reality is that when cruising as a couple it is just too much hassle to be changing them when the wind increases or decreases, so we leave the 12 mm ones on. It would be different if racing but for cruising it makes little difference. I use the 8 mm ones for a ghoster, which we fly from time to time in winds less than 10 knots.
 
So do you think the OP should learn how to fly his kite using unsuitable sheets, and then ask, hoping you approve of his question?

This is a forum people ask questions, people answer them as best they can (mostly).

Fair point, but : every journey starts with a step :D

Boo2

Boo, Can I suggest your first step is to climb on some ones else's boat racing or cruising and get some hands on experience. You will soon learn the basics and after afew races you would be able to answer all these questions and more!

Personally would not bother with light weight sheets till you find you need them. IMHO If its that light you want them as a cruiser you will be motoring, and yes you can use your spinnaker sheets for your cruising chute.
 
Boo, Can I suggest your first step is to climb on some ones else's boat racing or cruising and get some hands on experience.
I already have some experience flying a spinnaker when I did my DS course. I would still need to ask on these forums for things like sheet sizes and other rigging details etc however much experience I gained.

My plan in respect of sailing is to fit out my own boat rather than sail on other peoples' but I may hire a skipper for some own boat training when it comes to things like spinnaker work.

Boo2
 
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