John Dory 18'3" Sprit Rig (Leg O'Mutton)
Description
The John Dory Sprit Rig (Leg O'Mutton), designed by Iain Oughtred, is a 17-foot (5.2 m) traditional-inspired plywood skiff optimized for rowing, sailing, and fishing in coastal and sheltered waters, featuring a sprit-rigged leg-of-mutton sail of approximately 75 square feet (7 m²) with a simple, unstayed wooden mast stepped forward, a diagonal sprit boom for tensioning the sail's peak, and no boom for easy reefing and loose-footed efficiency. Built using glued-lapstrake construction from 6 mm marine plywood with built-in flotation and a daggerboard for upwind performance, it weighs around 200-250 lbs (90-113 kg), offers a spacious cockpit for two to three adults, and rows smoothly with 8-9 foot oars, drawing inspiration from classic Scottish dories for its stable, fine-ended hull that handles chop well. With plans available from Oughtred's catalog via outlets like the WoodenBoat Store, the design emphasizes amateur-friendly building, low maintenance, and versatile day-use, making it popular among traditional boat enthusiasts seeking a forgiving, high-aspect rig that performs well in light airs without the complexity of stays or jibs.
The standard boat dimensions
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Sails
John Dory 18'3" Sprit Rig (Leg O'Mutton) - MAINSAIL
| Luff | 17 ft - (5182 mm) |
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| Foot | 11 ft - (3353 mm) |
| Leech | * 19.65 ft - (5989 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 19.92 ft - (6072 mm) |
| Head (inches) | * 5.25 in - (133 mm) |
| Area | * 96.85 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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