Upwind Tell tales

Tuning the Supernova Dinghy

Upwind Tell tales

Postby [email protected] » Tue Sep 07, 2021 2:23 pm

Hi

I’m new to the class this season. I’m struggling with lack of speed upwind, which I think is common for people new to the boat.

Question -in a F3 I’m 105kg so underpowered. Looking a luff tell tales, bottom 2 flying in the power - windward raised at 30deg, leeward running horizontal. Top telltale - windward backing massively, leeward ok.

Whacked on some kicker - even though underpowered - didn’t really move the tell tale. So I’m shedding the top 1/3 of the sail.

Is it?
A) I need to increase rake, bend the top of the mast and flatten the sail
B) I need to put even more kicker on (not sure how…)
C) the sail is blown
D) something else….

Thanks

Rob
1071
[email protected]
 
Posts: 1
Joined: Fri May 14, 2021 9:57 am

Re: Upwind Tell tales

Postby SolidAir » Tue Sep 07, 2021 5:20 pm

I'm also fairly new to the class and have been working through how to set up the rig. I'm sure you'll get more expert advice as well.

Generally, the top of a sail should be slightly more open than the foot (due to the apparent wind being at a greater angle to the boat higher up) so set the kicker so the top luff telltale is about 50% flying.

If you rake the mast back, you'll lose a bit of power, which doesn't sound like what you want. You might try raking it slightly more upright (depending on where it is now) or putting on more rig tension, which will bring the mast more laterally upright. The tuning guides on the website will help with this, though my observation is that people are generally sailing with more rig tension than the guides indicate. I have about 180 pounds of tension on the shrouds upwind in a F3, which means the leeward shroud is only slightly loose. I'm going to try with more tension too. (People worry it could damage the boat, but consider how much tension a decent breeze puts on the windward shroud!)

At your weight I would set the spreaders to their maximum length and set the lowers to tighten up as the kicker comes on.

After all that, if it still doesn't work, try putting on some cunningham to flatten the top of the sail. If that fixes it then ok ... but it's also depowering you and probably means it's time for a new sail :-(

Good luck!

Alex
1280
SolidAir
 
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