O'Day 30 vs Yngling
How do the O'Day 30 and Yngling compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
O'Day 30 
Yngling | O'Day 30 | Yngling | |
|---|---|---|
| Length overall | 29.9 ft9.12 m | 20.8 ft6.35 m |
| Waterline length | 25.4 ft7.75 m | 15.4 ft4.70 m |
| Beam | 10.8 ft3.28 m | 5.7 ft1.73 m |
| Draft | 4.9 ft1.49 m | 3.4 ft1.05 m |
| Displacement | 10,150 lb4,604 kg | 1,323 lb600 kg |
| Ballast | 4,000 lb1,814 kg | 683 lb310 kg |
| Sail area | 441 ft²41.0 m² | 156 ft²14.5 m² |
| SA / Displacement | 15.05 | 20.71 |
| Displacement / Length | 276 | 161 |
| Comfort ratio | 24.8 | 11.9 |
| Capsize screening | 1.99 | 2.07 |
| Hull speed (kn) | 6.8 | 5.3 |
O'Day 30 vs Yngling: the short version
- The O'Day 30 is the larger boat at 29.9 ft9.12 m LOA versus 20.8 ft6.35 m for the Yngling.
- The O'Day 30 is heavier, displacing about 667% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Yngling carries the more powerful rig (20.7 vs 15.1), favouring lighter-air performance.
- The O'Day 30 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the O'Day 30 rates better for offshore work (1.99 vs 2.07).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.