F-9a
Description
The F-9A is a high-performance folding trimaran sailboat designed by renowned multihull designer Ian Farrier. Introduced in 1991, it was intended as a plans-built (home or professional amateur construction) version of the production Corsair 31 trimaran. The F-9A emphasizes speed, ease of trailering, and versatility for both racing and cruising, with Farrier's patented folding system allowing the amas (outer hulls) to fold inward for road transport. Approximately 300 units were built, many as custom projects using cedar strip plank construction covered in fiberglass and epoxy. It gained recognition early on, with the F-31 (its production sibling) named Australian Sailboat of the Year in 1992. Variants include the F-9R (racing-oriented with a rotating mast) and F-9AX (extended version for increased trailering width up to 9'6").
Construction Details
| Designer | Ian Farrier |
|---|---|
| Length | 30.000 ft |
| LOA | 30.830 ft |
| LWL | 30.000 ft |
| Beam | 22.420 ft |
| Displacement | 3500 lb |
| Max Draft | 5.500 ft |
| Min Draft | 1.330 ft |
The standard boat dimensions
| i | - |
|---|---|
| j | - |
| p | - |
| e | - |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - | - |
Blueprints
Sails
| Sail Type | MAINSAIL |
|---|---|
| Luff | 37 ft - (11278 mm) |
| Foot | 14.083 ft - (4292 mm) |
| Leech | * 38.72 ft - (11802 mm) |
| Tack Angle | * 87.45 ° |
| Diagonal | 39 ft - (11887 mm) |
| Head (inches) | * 6 in - (152 mm) |
| Area | * 268.33 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 34.25 ft - (10439 mm) |
| Foot | 13.5 ft - (4115 mm) |
| Leech | 30.25 ft - (9220 mm) |
| Length Perpendicular | 11.87 ft - (3618 mm) |
| Area | * 203.31 ft² |
| Sail Type | JIBSAIL |
|---|---|
| Luff | 36.083 ft - (10998 mm) |
| Foot | 12.75 ft - (3886 mm) |
| Leech | 32.083 ft - (9779 mm) |
| Length Perpendicular | * 11.23 ft - (3423 mm) |
| Area | * 202.67 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 39 ft - (11887 mm) |
| Foot | 25.8 ft - (7864 mm) |
| Leech | 34.8 ft - (10607 mm) |
| Length Perpendicular | 22.57 ft - (6879 mm) |
| Area | * 440.03 ft² |
| Sail Type | GENOA |
|---|---|
| Luff | 36.083 ft - (10998 mm) |
| Foot | 16.92 ft - (5157 mm) |
| Leech | 32 ft - (9754 mm) |
| Length Perpendicular | * 15 ft - (4572 mm) |
| Area | * 270.71 ft² |
| Sail Type | ASYMMETRICAL |
|---|---|
| Luff | 42 ft - (12802 mm) |
| Foot | 31.75 ft - (9677 mm) |
| Leech | 38 ft - (11582 mm) |
| Area | * 1000 ft² |
| Sail Type | ASYMMETRICAL |
|---|---|
| Luff | 41.67 ft - (12701 mm) |
| Foot | 28.25 ft - (8611 mm) |
| Leech | 35.42 ft - (10796 mm) |
| Area | * 883 ft² |
| Sail Type | SPINNAKER |
|---|---|
| Stays | 35.5 ft - (10820 mm) |
| MidGirth | 28 ft - (8534 mm) |
| Foot | 28 ft - (8534 mm) |
| Area | * 845 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.