Add your sails
Scan the tag in the tack or pick your sailmaker. We load the sail's design targets so every scan is judged against how it was built to look.
- Design camber targets from Elvstrøm, 6 to 22 kts
- Accepted range ±1.5 points at every wind speed
- Trim advice tuned for a backstay-bent masthead rig
Waiting for its tag scan
Mock — numbers invented. Not connected to any real sail data.
What's the wind doing?
True wind speed when you took the photo. We use it to pick the right target shape.
Mock: the rest of the flow is fixed at 14 kts.
Great scan. It looks like you're a little full in your middle stripe, 16.8% deep where this sail wants about 14% in 14 knots. Your top and bottom are clearly in the acceptable range, so the sail is mostly right where it should be.
To get more height and less heel, consider flattening the middle part of the sail. Pull on a few more turns of backstay to bend the mast, or, if you're already near max backstay, snug the vang to push the boom into the mast and bend it lower down. Add a touch of cunningham with the backstay so the draft doesn't slide aft. Leave the outhaul alone; the bottom is fine.
You should see an increase in speed and efficiency: a boat that points higher and stays on its feet in the puffs. Go!
Middle stripe fuller than target. Top and bottom in range.
| Stripe | Camber % | Draft % |
|---|---|---|
| ■ 75% Top | 13.5 | 38.0 |
| ■ 50% Middle | 16.8 | 41.0 |
| ■ 25% Bottom | 14.8 | 43.0 |
The airflow is a fast flow model worked out on this phone for these exact shapes. It shows attached flow only, not stall, so use it to compare trim, not instead of telltales. Colours are relative.
| Stripe | Target | Accepted | Measured | Verdict |
|---|---|---|---|---|
| Top | 14.0% | 12.5 to 15.5% | 13.5% | in |
| Middle | 14.0% | 12.5 to 15.5% | 16.8% | high |
| Bottom | 14.0% | 12.5 to 15.5% | 14.8% | in |
Targets from your Elvstrøm EPEX main design at 14 kts. Assumes a masthead rig with an adjustable backstay.
Mock — numbers invented. One made-up scan (main, 14 kts) used on every screen. Target curve is the generic 17% to 11% rule.