Alpha 120 F vs Chopper Junior
How do the Alpha 120 F and Chopper Junior compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Alpha 120 F | Alpha 120 F | Chopper Junior | |
|---|---|---|
| Length overall | 9.7 ft2.95 m | 9.6 ft2.92 m |
| Waterline length | —— | —— |
| Beam | 2.1 ft0.63 m | 2.1 ft0.63 m |
| Draft | —— | —— |
| Displacement | 25 lb11 kg | 29 lb13 kg |
| Ballast | —— | —— |
| Sail area | —— | —— |
| SA / Displacement | — | — |
| Displacement / Length | — | — |
| Comfort ratio | — | — |
| Capsize screening | 2.83 | 2.70 |
| Hull speed (kn) | — | — |
Alpha 120 F vs Chopper Junior: the short version
- The Alpha 120 F and Chopper Junior are close in length (9.7 ft2.95 m vs 9.6 ft2.92 m ).
- The Chopper Junior is heavier, displacing about 16% more, which usually means a steadier but slower-to-accelerate hull.
- By the capsize screening formula the Chopper Junior rates better for offshore work (2.70 vs 2.83).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.