Ideal 18 vs Monark 540
How do the Ideal 18 and Monark 540 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Ideal 18 | Ideal 18 | Monark 540 | |
|---|---|---|
| Length overall | 17.9 ft5.44 m | 17.7 ft5.40 m |
| Waterline length | 14.3 ft4.37 m | 15.8 ft4.80 m |
| Beam | 6.2 ft1.89 m | 6.6 ft2.00 m |
| Draft | 3.3 ft0.99 m | 3.1 ft0.95 m |
| Displacement | 1,240 lb562 kg | 1,764 lb800 kg |
| Ballast | 700 lb318 kg | 882 lb400 kg |
| Sail area | 175 ft²16.3 m² | 145 ft²13.5 m² |
| SA / Displacement | 24.26 | 15.89 |
| Displacement / Length | 187 | 202 |
| Comfort ratio | 10.9 | 13.6 |
| Capsize screening | 2.31 | 2.17 |
| Hull speed (kn) | 5.1 | 5.3 |
| Average used price | — | €800 |
Ideal 18 vs Monark 540: the short version
- The Ideal 18 and Monark 540 are close in length (17.9 ft5.44 m vs 17.7 ft5.40 m ).
- The Monark 540 is heavier, displacing about 42% 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 15.9), favouring lighter-air performance.
- The Monark 540 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Monark 540 rates better for offshore work (2.17 vs 2.31).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.