JOY IV - NOR10107
Sailing performance analysis for a FIRST 31.7 LR from 2002, built by Beneteau and designed by Finot.
Data provided by the Offshore Racing Congress (ORC) · Certificate issued 21/04/2026
A versatile cruiser-racer that achieves 5.8 knots upwind in 10 knots of wind. It excels reaching at 6.9 knots in the same conditions, making it a strong performer when not running directly downwind. The boat's downwind speed is a bit restrained at 5.0 knots with the symmetric spinnaker. It comes equipped with a large genoa in relation to the mainsail, providing power and balance upwind.
Sailing performance as a polar diagram
A polar diagram shows boat speed at different wind angles and wind speeds. The distance from center represents boat speed in knots, and the angle represents the boats angle to the wind. The wind speed is shown as true wind speed (TWS), not apparent wind speed. Likewise, the wind angle is shown as true wind angle (TWA), not apparent wind angle.
Beat: Sailing upwind (toward the wind)
Beam Reach: Sailing across the wind
Run: Sailing downwind (away from the wind)
VMG Performance
Wind Speed (columns): True wind speed (TWS) in knots - the actual wind speed, not the apparent wind you feel on deck.
VMG (Velocity Made Good) is your effective speed toward your destination, not your actual boat speed.
Beat VMG (top bars): Speed made good when sailing upwind. Higher is better - it means you're reaching the windward mark faster.
Run VMG (bottom bars): Speed made good when sailing downwind. Higher is better - it means you're reaching the leeward mark faster.
Measured sails
Measurements
🏁 Race Results🥇1 🥈3 🥉3
| Date | Event | Result | Class | Skipper |
|---|---|---|---|---|
| 2026 | ||||
| 02.09.2026 | Asker Seilforening - Onsdagsserie høst 2026 | 5/8 | Liten =< 1.0700 | TROND GUNDERSEN |
| 17.06.2026 | Asker Seilforening - Onsdagsserie vår 2026 | 2/8🥈 | Liten =< 1.0700 | Trond Gundersen |
| 12.06.2026 | Færderseilasen 2026 | 8/20 | RACING med spi 2 | Trond GUNDERSEN |
| 20.05.2026 | Asker og Bærum Seilforening Superonsdag 2026 | 2/24🥈 | Liten Klasse | Trond Gundersen |
| 2025 | ||||
| 10.09.2025 | Asker seilforening Klubbmesterskap Storbåt | 5/11 | Liten Klasse | TROND GUNDERSEN |
| 13.08.2025 | Asker Seilforening - Onsdagsserie høst | 3/12🥉 | Liten =< 1.0700 | TROND GUNDERSEN |
| 13.06.2025 | Færderseilasen 2025 | 2/17🥈 | Racing med spinnaker 2 | Trond GUNDERSEN |
| 14.05.2025 | Asker Seilforening og Bærum Seilforening Superonsdag | 10/31 | LITEN | Trond Gundersen |
| 30.04.2025 | Asker Seilforening - Onsdagsserie vår | 3/12🥉 | LITEN =< 1.0700 | Trond Gundersen |
| 2024 | ||||
| 04.09.2024 | Superonsdager Bærum og Asker 2024 | 5/41 | Klasse F - APH <1,07 | Trond GUNDERSEN |
| 31.08.2024 | Hollænderseilasen 2024 | 3/15🥉 | NOR MS1 | Trond GUNDERSEN |
| 14.06.2024 | Færderseilasen 2024 | 1/15🥇 | NRMSH2 | Trond GUNDERSEN |
Race results from manage2sail.com & sailracesystem.no
Identity
Dimensions
Sail Areas
ORC Rating
Rated boat speeds
| Wind Speed (TWS) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4 kt | 6 kt | 8 kt | 10 kt | 12 kt | 14 kt | 16 kt | 20 kt | 24 kt | |
| Beat VMG | 2.31 | 3.29 | 3.98 | 4.43 | 4.64 | 4.72 | 4.75 | 4.74 | 4.61 |
| 52° | 3.63 | 5.00 | 5.88 | 6.41 | 6.65 | 6.74 | 6.78 | 6.82 | 6.76 |
| 60° | 3.90 | 5.25 | 6.10 | 6.60 | 6.84 | 6.94 | 7.00 | 7.05 | 7.02 |
| 75° | 4.08 | 5.42 | 6.27 | 6.75 | 7.03 | 7.21 | 7.31 | 7.45 | 7.49 |
| 90° | 3.94 | 5.32 | 6.22 | 6.76 | 7.08 | 7.34 | 7.55 | 7.82 | 8.00 |
| 110° | 3.65 | 5.16 | 6.23 | 6.86 | 7.25 | 7.58 | 7.83 | 8.17 | 8.32 |
| 120° | 3.49 | 4.96 | 6.06 | 6.77 | 7.21 | 7.58 | 7.94 | 8.60 | 9.07 |
| 135° | 3.03 | 4.43 | 5.54 | 6.40 | 6.95 | 7.36 | 7.76 | 8.67 | 9.98 |
| 150° | 2.52 | 3.77 | 4.86 | 5.78 | 6.51 | 6.99 | 7.37 | 8.17 | 9.27 |
| Run VMG | 2.18 | 3.26 | 4.21 | 5.03 | 5.74 | 6.33 | 6.79 | 7.51 | 8.26 |
Boat speed (knots) at wind angle / wind speed