Bolger 31 Folding Schooner
Description
The Bolger 31 Folding Schooner is one of the most distinctive and ingenious designs by the legendary American boat designer Philip C. Bolger, known for his unconventional yet thoroughly practical small craft. Designed in the early 1970s, the 31‑foot Folding Schooner exemplifies Bolger’s experimental spirit—a trailerable, folding sailing vessel that could be launched and recovered with ease, yet still provide big‑boat presence and performance under sail. The design features two folding hull sides that pivot upward amidships, allowing the boat’s beam to collapse for trailering. When unfolded and secured, the result is a full‑beam schooner with the aesthetic of a classic working sailboat married to the practicality of modern mobility. Bolger paired this with his characteristic simplified flat‑panel construction, intended for plywood and epoxy amateur boatbuilding.
Construction Details
| Designer | Bolger, Philip C. |
|---|---|
| Builder | Home Built |
| Length | 31.000 ft |
| LOA | 31.000 ft |
| Beam | 8.500 ft |
| Displacement | 2000 lb |
| Max Draft | 4.000 ft |
| Min Draft | 1.500 ft |
| Year Built | 1971 |
The standard boat dimensions
| i | - |
|---|---|
| j | - |
| p | - |
| e | - |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - | - |
Blueprints
Sails
Bolger 31 Folding Schooner - JIBSAIL
| Luff | 13 ft - (3962 mm) |
|---|---|
| Foot | 8.083 ft - (2464 mm) |
| Leech | 8.33 ft - (2539 mm) |
| Length Perpendicular | * 5.01 ft - (1527 mm) |
| Area | * 32.56 ft² |
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Bolger 31 Folding Schooner - STAYSAIL
| Luff | 12 ft - (3658 mm) |
|---|---|
| Foot | 4.75 ft - (1448 mm) |
| Leech | 9.42 ft - (2871 mm) |
| Area | * 20.83 ft² |
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Bolger 31 Folding Schooner - GAFF FORESAIL
| Luff | 6.75 ft - (2057 mm) |
|---|---|
| Foot | 8.58 ft - (2615 mm) |
| Leech | 12.33 ft - (3758 mm) |
| Head | * 75.54 ft - (23025 mm) |
| Diag (clew/throat) | 9.5 ft - (2896 mm) |
| Tack Angle | 7.5 ° |
| Area | * 63.64 ft² |
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Bolger 31 Folding Schooner - GAFF MAIN
| Luff | 8 ft - (2438 mm) |
|---|---|
| Foot | 13.25 ft - (4039 mm) |
| Leech | 15.083 ft - (4597 mm) |
| Tack Angle | * 76.22 ° |
| Diag (clew/throat) | 13.75 ft - (4191 mm) |
| Head | 7.5 ft - (2286 mm) |
| Area | * 102.84 ft² |
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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.
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