First 21.7
Boat highlights
First 21.7 is currently estimated in the Good band with an SBP score of 106.
Length overall
21.0 ft
Primary sail area
269 ft²
Displacement
2,877 lbs
Quick actions
Jump back to browsing, customize this design, or share it with your crew.
Performance Analysis
Detailed performance metrics and polar diagram for First 21.7.
Methodology note: SBP scores, polar diagrams, hull-speed values, and derived ratios are estimates. Use them for comparison and planning support—not as a substitute for manufacturer specifications, measured sea trials, rating certificates, professional weather routing, or safety margins. Review how we rate boats.
Performance Metrics
Speed Estimates
| Wind Speed (kn) | Beat VMG (kn) | Run VMG (kn) |
|---|---|---|
| 6 | 2.7 | 3.0 |
| 8 | 3.3 | 3.8 |
| 10 | 3.7 | 4.5 |
| 12 | 4.1 | 5.0 |
| 14 | 4.2 | 5.4 |
| 16 | 4.3 | 5.8 |
| 20 | 4.3 | 6.4 |
Polar Diagram
Wind Speed (kn)
Key Specifications
Explore the hull dimensions and sail plan for First 21.7.
Dimensions
Sails
Construction ratios
Discussion
Share your experiences with First 21.7.
You need to be logged in to join the discussion.
Log in to commentData sources and methodology
Published specifications are kept separate from calculated ratios and estimated performance. SBP and speed outputs are model-based estimates, not owner ratings or certified handicaps.
- Specifications
- verified
- Ratios
- derived
- Performance
- estimated
Last checked: 27 Aug 2026. Source: Beneteau official website. Read the SBP methodology.
