Irwin Citation 31
Description
The Irwin Citation 31 is a fiberglass masthead sloop designed by naval architect Ted Irwin and built by Irwin Yachts from 1983 to 1987. Part of the "Citation" series aimed at budget-conscious buyers, it blends coastal cruising comfort with modest club racing potential, offering a spacious interior for its size despite its economy construction. With a beamier hull than many contemporaries, it feels roomy for weekend overnighters or short family trips on protected waters like the Chesapeake Bay. Production was limited to around 200-250 hulls, reflecting Irwin's focus on affordable, no-frills designs during a period of financial recovery.
The standard boat dimensions
| i | 42 ft |
|---|---|
| j | 13 ft |
| p | 37 ft |
| e | 12 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 42 ft | 13 ft | 37 ft | 12 ft | - | - | - | - |
Sails
| Sail Type | MAINSAIL |
|---|---|
| Luff | * 37 ft - (11278 mm) |
| Foot | * 12 ft - (3658 mm) |
| Leech | * 38.26 ft - (11662 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 38.5 ft - (11735 mm) |
| Head (inches) | * 5.25 in - (133 mm) |
| Area | * 228.89 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | * 35.17 ft - (10720 mm) |
| Foot | * 17.13 ft - (5221 mm) |
| Leech | * 30.69 ft - (9354 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 14.95 ft - (4557 mm) |
| Deck Angle | * 12.04 ° |
| Area | * 262.86 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | * 41.77 ft - (12731 mm) |
| Foot | * 20.92 ft - (6376 mm) |
| Leech | * 39.36 ft - (11997 mm) |
| Percentage LP | * 150 % |
| Length Perpendicular | * 19.5 ft - (5944 mm) |
| Deck Angle | * 4.04 ° |
| Area | * 407.23 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 41 ft - (12497 mm) |
| Foot | 19 ft - (5791 mm) |
| Leech | 39 ft - (11887 mm) |
| Percentage LP | * 137.77 % |
| Length Perpendicular | * 17.91 ft - (5459 mm) |
| Deck Angle | * 2.34 ° |
| Area | * 367.08 ft² |
| Sail Type | ASYMMETRICAL |
|---|---|
| Luff | 42.75 ft - (13030 mm) |
| Foot | 22 ft - (6706 mm) |
| Leech | 40 ft - (12192 mm) |
| Perc LP | * 165 % |
| Area | * 705 ft² |
| Sail Type | SPINNAKER |
|---|---|
| Stays | * 41.77 ft - (12731 mm) |
| MidGirth | * 23.4 ft - (7132 mm) |
| Foot | * 23.4 ft - (7132 mm) |
| Perc LP | * 180 % |
| Area | * 831 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. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.