Ideal 18 vs Sanibel 18
How do the Ideal 18 and Sanibel 18 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Ideal 18 
Sanibel 18 | Ideal 18 | Sanibel 18 | |
|---|---|---|
| Length overall | 17.9 ft5.44 m | 17.9 ft5.45 m |
| Waterline length | 14.3 ft4.37 m | 15.1 ft4.59 m |
| Beam | 6.2 ft1.89 m | 7.8 ft2.38 m |
| Draft | 3.3 ft0.99 m | 4.0 ft1.22 m |
| Displacement | 1,240 lb562 kg | 1,369 lb621 kg |
| Ballast | 700 lb318 kg | 450 lb204 kg |
| Sail area | 175 ft²16.3 m² | 170 ft²15.8 m² |
| SA / Displacement | 24.26 | 22.06 |
| Displacement / Length | 187 | 179 |
| Comfort ratio | 10.9 | 8.6 |
| Capsize screening | 2.31 | 2.81 |
| Hull speed (kn) | 5.1 | 5.2 |
Ideal 18 vs Sanibel 18: the short version
- The Ideal 18 and Sanibel 18 are close in length (17.9 ft5.44 m vs 17.9 ft5.45 m ).
- The Sanibel 18 is heavier, displacing about 10% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Ideal 18 carries the more powerful rig (24.3 vs 22.1), favouring lighter-air performance.
- The Ideal 18 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Ideal 18 rates better for offshore work (2.31 vs 2.81).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.