First 31.7
Performance Cruiser Built by Beneteau
Boat highlights
First 31.7 is currently in the Decent band with an SBP score of 95.
Length overall
31.5 ft
Primary sail area
570 ft²
Displacement
8,267 lbs
Performance band: Decent GPH rating: 678
95
SBP score
Decent band
Quick actions
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Performance Analysis
Detailed performance metrics and polar diagram for First 31.7.
Performance Metrics
SBP Score
ⓘ
95
ORC GPH
ⓘ
678
Average Speed (GPH)
ⓘ
5.3 kn
Yardstick
ⓘ
98.2
Sail Carry Number
ⓘ
4.7
Planing Potential
ⓘ
1.1 (medium)
Hull Speed
ⓘ
6.9 kn
Speed Estimates
| Wind Speed (kn) | Beat VMG (kn) | Run VMG (kn) |
|---|---|---|
| 6 | 3.1 | 3.4 |
| 8 | 3.8 | 4.3 |
| 10 | 4.3 | 5.1 |
| 12 | 4.7 | 5.7 |
| 14 | 4.8 | 6.1 |
| 16 | 4.9 | 6.5 |
| 20 | 4.9 | 7.2 |
Polar Diagram
Wind Speed (kn)
Key Specifications
Explore the hull dimensions and sail plan for First 31.7.
Dimensions
Length over all 31.53 ft
Length at Waterline 26.26 ft
Hull Speed 6.9 kn
Beam 10.60 ft
Draft 6.23 ft
Displacement 8,267 lbs
Sails
Main Sail Area 254.03 ft²
Foresail Area 311.08 ft²
Upwind Sail Area 570.49 ft²
Spinnaker/Gennaker Area 757.35 ft²
Construction ratios
Sail area-to-displacement (SA/D)
22.3Capsize screening (CSF)
2.08Comfort ratio (CR)
19.6Discussion
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