Alden 21
Description
John Alden 21 foot knockabout sloop
Sail calculations are not available for this boat as some dimensions are missing.
Construction Details
| Designer | John Alden |
|---|---|
| Length | 21.000 ft |
The standard boat dimensions
| i | - |
|---|---|
| j | - |
| p | - |
| e | - |
| p2 | - |
| e2 | - |
| I | J | P | E | P2 | E2 |
|---|---|---|---|---|---|
| - | - | - | - | - | - |
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 | GAFF MAIN |
|---|---|
| Luff | 13.67 ft - (4167 mm) |
| Foot | 16.42 ft - (5005 mm) |
| Leech | 28.5 ft - (8687 mm) |
| Head | * 88 ft - (26822 mm) |
| Diag (clew/throat) | * 21 ft - (6401 mm) |
| Tack Angle | 12.83 ° |
| Area | * 236.58 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 17.83 ft - (5435 mm) |
| Foot | 7.33 ft - (2234 mm) |
| Leech | 15.67 ft - (4776 mm) |
| Area | * 57.24 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.