J 99
Performance Cruiser Built by J Boats
Boat highlights
J 99 is currently in the Decent band with an SBP score of 89.
Length overall
32.6 ft
Primary sail area
570 ft²
Displacement
8,378 lbs
Performance band: Decent GPH rating: 689
89
SBP score
Decent band
Quick actions
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Performance Analysis
Detailed performance metrics and polar diagram for J 99.
Performance Metrics
SBP Score
ⓘ
89
ORC GPH
ⓘ
689
Average Speed (GPH)
ⓘ
5.2 kn
Yardstick
ⓘ
94.5
Sail Carry Number
ⓘ
4.7
Planing Potential
ⓘ
1.0 (medium)
Hull Speed
ⓘ
7.0 kn
Speed Estimates
| Wind Speed (kn) | Beat VMG (kn) | Run VMG (kn) |
|---|---|---|
| 6 | 3.2 | 3.0 |
| 8 | 3.9 | 3.9 |
| 10 | 4.4 | 4.7 |
| 12 | 4.7 | 5.4 |
| 14 | 4.9 | 6.0 |
| 16 | 5.0 | 6.5 |
| 20 | 5.0 | 7.3 |
Polar Diagram
Wind Speed (kn)
Key Specifications
Explore the hull dimensions and sail plan for J 99.
Dimensions
Length over all 32.61 ft
Length at Waterline 27.17 ft
Hull Speed 7.0 kn
Beam 11.15 ft
Draft 6.53 ft
Displacement 8,378 lbs
Sails
Main Sail Area 298.91 ft²
Foresail Area 272.33 ft²
Upwind Sail Area 570.49 ft²
Spinnaker/Gennaker Area N/A ft²
Construction ratios
Sail area-to-displacement (SA/D)
22.1Capsize screening (CSF)
2.18Comfort ratio (CR)
18.0Discussion
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