Impulse 21
Description
1300 lbs. Disp. 600 lbs. Ballast 18' LWL 8' Beam 3'5" Draft
Construction Details
| Designer | Bill Cook |
|---|---|
| Length | 21.000 ft |
| LOA | 21.000 ft |
| LWL | 18.500 ft |
| Beam | 8.000 ft |
| Displacement | 1300 lb |
| Max Draft | 3.250 ft |
The standard boat dimensions
| i | 23.50 ft |
|---|---|
| j | 7 ft |
| p | 26 ft |
| e | 9.70 ft |
| p2 | - |
| e2 | - |
| I | J | P | E | P2 | E2 |
|---|---|---|---|---|---|
| 23.50 ft | 7 ft | 26 ft | 9.70 ft | - | - |
Sails
An asterisk indicates that a computer algorithm was used to determine the dimension based on sailboat rig dimensions (usually the I, J, E, and P)
| Sail Type | MAINSAIL |
|---|---|
| Luff | * 26 ft - (7925 mm) |
| Foot | * 9.7 ft - (2957 mm) |
| Leech-AftHdBd | * 27.22 ft - (8297 mm) |
| Tack Ang | * 88 ° |
| Diag (clew/head) | * 27.43 ft - (8361 mm) |
| Head (inches) | * 4.5 in |
| Area (no Roach) | * 130.26 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 23.42 ft - (7138 mm) |
| Foot | 6.25 ft - (1905 mm) |
| Leech | 21.5 ft - (6553 mm) |
| Percentage LP | * 80.71 % |
| Length Perpendicular | * 5.65 ft - (1722 mm) |
| Deck Angle | * 8.76 ° |
| Area | * 66.14 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 23.42 ft - (7138 mm) |
| Foot | 7.67 ft - (2338 mm) |
| Leech | 21.5 ft - (6553 mm) |
| Percentage LP | * 100.29 % |
| Length Perpendicular | * 7.02 ft - (2140 mm) |
| Deck Angle | * 7.23 ° |
| Area | * 82.17 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 23.42 ft - (7138 mm) |
| Foot | 8.75 ft - (2667 mm) |
| Leech | 21.875 ft - (6668 mm) |
| Percentage LP | * 116.71 % |
| Length Perpendicular | * 8.17 ft - (2490 mm) |
| Deck Angle | * 4.36 ° |
| Area | * 95.69 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | * 23.29 ft - (7099 mm) |
| Foot | * 11.22 ft - (3420 mm) |
| Leech | * 22 ft - (6706 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 10.5 ft - (3200 mm) |
| Deck Angle | * 4.06 ° |
| Area | * 122.26 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 23 ft - (7010 mm) |
| Foot | 10.083 ft - (3073 mm) |
| Leech | 21.75 ft - (6629 mm) |
| Percentage LP | * 135.43 % |
| Length Perpendicular | * 9.48 ft - (2890 mm) |
| Deck Angle | * 3.28 ° |
| Area | * 109.06 ft² |
| Sail Type | ASYMMETRICAL |
|---|---|
| Luff | 24 ft - (7315 mm) |
| Foot | 14 ft - (4267 mm) |
| Leech | 22.25 ft - (6782 mm) |
| Perc LP | * 165 % |
| Area | * 252 ft² |
| Sail Type | SPINNAKER |
|---|---|
| Stays | 23.58 ft - (7187 mm) |
| MidGirth | 14.4 ft - (4389 mm) |
| Foot | 14.4 ft - (4389 mm) |
| Perc LP | * 180 % |
| Area | * 289 ft² |
| Sail Type | SPINNAKER |
|---|---|
| Stays | * 23.29 ft - (7099 mm) |
| MidGirth | * 12.6 ft - (3840 mm) |
| Foot | * 12.6 ft - (3840 mm) |
| Perc LP | * 180 % |
| Area | * 249 ft² |
| Sail Type | STORMJIB |
|---|---|
| Luff | * 13.49 ft - (4112 mm) |
| Foot | * 5.16 ft - (1573 mm) |
| Leech | * 11.3 ft - (3444 mm) |
| Perc LP | * 60 % |
| Length Perp | * 4.2 ft - (1280 mm) |
| Deck Angle | * 18.95 ° |
| Area | * 28.32 ft² |
Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite.