J/35 vs J/70
How do the J/35 and J/70 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
J/35 
J/70 | J/35 | J/70 | |
|---|---|---|
| Length overall | 35.5 ft10.82 m | 22.7 ft6.93 m |
| Waterline length | 30.0 ft9.14 m | 20.5 ft6.24 m |
| Beam | 11.8 ft3.60 m | 7.4 ft2.25 m |
| Draft | 6.9 ft2.10 m | 4.9 ft1.50 m |
| Displacement | 10,500 lb4,763 kg | 1,790 lb812 kg |
| Ballast | 4,400 lb1,996 kg | 628 lb285 kg |
| Sail area | 636 ft²59.1 m² | 226 ft²21.0 m² |
| SA / Displacement | 21.22 | 24.53 |
| Displacement / Length | 174 | 93 |
| Comfort ratio | 19.2 | 9.1 |
| Capsize screening | 2.16 | 2.43 |
| Hull speed (kn) | 7.3 | 6.1 |
J/35 vs J/70: the short version
- The J/35 is the larger boat at 35.5 ft10.82 m LOA versus 22.7 ft6.93 m for the J/70.
- The J/35 is heavier, displacing about 487% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the J/70 carries the more powerful rig (24.5 vs 21.2), favouring lighter-air performance.
- The J/35 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the J/35 rates better for offshore work (2.16 vs 2.43).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.