Impulse 21 - Sailboat Data & Rig Dimensions
| Rig Dimensions | Imperial | Metric |
|---|---|---|
| I | 23.50 | 7.16 |
| J | 7.00 | 2.13 |
| P | 26.00 | 7.92 |
| E | 9.70 | 2.96 |
| PY | - | - |
| EY | - | - |
| ISP | 23.50 | 7.16 |
| JSP | 8.00 | 2.44 |
| Description | Imperial | Metric |
|---|---|---|
| Forestay Length | 7 | 2.1 |
| Sail Areas | Imperial | Metric |
|---|---|---|
| 100% Jib Sail Area | 82.3 | 7.6 |
| Mainsail Area (Cruising) | 136.2 | 12.7 |
| 100% Jib + Main Sail Area | 218.4 | 20.3 |
| Cruising Spinnaker Sail Area (1.7) | 159.8 | 14.9 |
| Dimensions | Imperial | Metric |
|---|---|---|
| LOA | 21.0 | 6.4 |
| LWL | 18.0 | 5.5 |
| Beam | 8.0 | 2.4 |
| Draft | N/A | N/A |
| Displacement | 1300 lbs. | 590 kgs. |
| Ballast | 600 lbs. | 272 kgs. |
| Ratios | Imperial | Metric |
|---|---|---|
| Sail Area / Displac. | 0.17 | 0.03 |
| Ballast / Displac. | 0.46 | 0.46 |
| Displac. / LOA | 61.9 | 92.19 |
| Construction | Information |
|---|---|
| Hull Type | Fin w/spade rudder |
| Rig Type | Fractional Sloop |
| Designer | William Cook |
| Builder | Impulse Marine / Johnson Boatworks (USA) |
| Construction | FG |
| Ballast Type | N/A |
| First Build | 1986 |
| Last Build | N/A |
| # Built | 150 |