IW-31 - Sailboat Data & Rig Dimensions
| Rig Dimensions | Imperial | Metric |
|---|---|---|
| I | 36.74 | 11.20 |
| J | 11.42 | 3.48 |
| P | 31.50 | 9.60 |
| E | 9.35 | 2.85 |
| PY | - | - |
| EY | - | - |
| ISP | 36.74 | 11.20 |
| JSP | 11.42 | 3.48 |
| Description | Imperial | Metric |
|---|---|---|
| Forestay Length | 11.4 | 3.5 |
| Sail Areas | Imperial | Metric |
|---|---|---|
| 100% Jib Sail Area | 209.8 | 19.5 |
| Mainsail Area (Cruising) | 159 | 14.8 |
| 100% Jib + Main Sail Area | 368.8 | 34.3 |
| Cruising Spinnaker Sail Area (1.7) | 356.6 | 33.2 |
| Dimensions | Imperial | Metric |
|---|---|---|
| LOA | 30.3 | 9.2 |
| LWL | 22.0 | 6.7 |
| Beam | 8.8 | 2.7 |
| Draft | N/A | N/A |
| Displacement | 7800 lbs. | 3538 kgs. |
| Ballast | 3400 lbs. | 1542 kgs. |
| Ratios | Imperial | Metric |
|---|---|---|
| Sail Area / Displac. | 0.05 | 0.01 |
| Ballast / Displac. | 0.44 | 0.44 |
| Displac. / LOA | 257.43 | 384.57 |
| Construction | Information |
|---|---|
| Hull Type | Fin with rudder on skeg |
| Rig Type | Masthead Sloop |
| Designer | Sparkman & Stephens |
| Builder | IW-Varvet |
| Construction | FG |
| Ballast Type | Iron |
| First Build | 1968 |
| Last Build | 1985 |
| # Built | 350 |