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Author Topic: settings for 2008
Neil Ashby Posted: 22-Feb-08 21:12
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Hi everybody
Being on the rather heavier side of the scale for all up crew weights i would like to know what the top heavy guys are using for shroud tension , mast rake etc please
If 7300 and 300lbs is the nominal how much variation with the heavy guys please.
 
Pete Lindley Posted: 22-Feb-08 22:20
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Heavy weight? I'm not sure you would be classed as that - unless beer has taken over your life! Are you at the front or the back nowadays?

Helm = ?
Crew = ?

Also - Sobstads or Hydes?


Pete

[Edited by Pete Lindley on 22-Feb-08 22:21]
 
rob Posted: 22-Feb-08 22:25
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Hi Neil

WE are one of or maybe the heaviest regulars on the circuit. We sail with 300 and about 7300 it seems to work for us. After various pro am discussions we have changed our settings but always come back to this. I would suggest you make sure your spreaders are right as well as it can make a huge difference.

At the end of the day tweaking is only tweaking. Going the right way up the beat and tacking at the right time is just as important, if you sail with the standard settings you will not be to far off the pace from there on in its up to you.

by the way we sail with sobstads at the moment i think we will have to have a fairly serious look at our settings if we go to Hydes.

Rob.


 
Neil Ashby Posted: 23-Feb-08 10:10
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Hi pete

Pete i am steering these days and around 90 odd kilos. Using a new set of Sobstads as well

Rob thanks for your input, I would have thought that being heavier you would have used far more rake i.e7400 mast more upright and spreaders forward as far as.

Checking spreaders etc today . what deflection should they be on and what length?

Neil
 
Pete Lindley Posted: 23-Feb-08 11:36
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Normal spreader setting is both back holes in the spreader bracket for each spreader and one hole showing on the tips. If you are lardy and also have good skills, go for more showing on the tips. Angling the spreaders further forward would give you more power as you know Neil, but it could help snap your mast as it would be closer to inverting even before you pull the kite up.

Check out this photo on the cover of Issue 07 of the ISOTopics mag (pdf file - right click save as)
http://www.isoracing.org.uk/about_and_press/isotopics/isotopics_iss07
_march1999.pdf


Don't want to give too much away - I know what you're like Neil!

Pete
 
rob Posted: 23-Feb-08 18:21
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Hi Neil

I know that what you say is right but the boat just seems to stall we did sail as you suggest for a while and found it was quite good as long as there was some wind. I guess experimentation is the way forward but for us we have to get our sailing more consistent otherwise there are to many variables. The only time we sail with other iso's is the circuit and it always seems a shame to risk new rig settings when we know we can do ok as we are.

Good luck with your testing.

By the way we are aprox 190kgs all up.

Rob
 
Chris W Posted: 29-Feb-08 07:54
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Neil,
I agree with Pete and Rob on this, although not on the circuit these days we we were quick enough when we did sail.
Henry and I weigh in at about 90 kgs each and we went for the max bend on the spreader settings as stated and two holes showing, around 320 lbs on the rig, 300 lbs in a blow.
Our reasoning was to set the sail up as flat as we could and then straignten with the mast twitcher to give the power. Allows you to get on the wire early, trapezing off the centreboard, kick blocks etc. Flys in a blow, flys in the light stuff, makes you work hard in the medium airs as you need to change the twitcher, kicker, jib barbers etc as the windspeed changes.
As Rob says time on the water gives you that "feeling" of when the boat is right. If it feels like you are riding a bucking bronco and you are being pulled all over the place by the wind then ease off a bit of twitcher and the boat suddenly just flows.
We also found in this mode you can get away with a more open slot on the jib and ease the barbers off.

Twitcher rope needs to be the best quality non stretch you can lay your hands on and it needs a calibration system/numbers.

I should also say this only works with the Sobstads, the Hydes look a lot flatter and will need a fair bit of work to see if we can get the required power from them to carry excess baggage. We could just go on a diet and turn into stick insects!!

Cheers from Sunny Cornwall.

[Edited by Chris W on 29-Feb-08 07:56]
 
Neil Ashby Posted: 01-Mar-08 17:45
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This is all very interesting stuff.

Quite different to all the other boats i have sailed , Musto Skiff , 800s , 49ers.

New boat new challenge new faces , its all good , see you all next saturday and sunday
 

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