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.
Construction Details
| Designer | Iain Oughtred |
|---|---|
| Builder | Home Built |
| Length | 18.250 ft |
The standard boat dimensions
| i | - |
|---|---|
| j | - |
| p | - |
| e | - |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - | - |
Documents
Sails
John Dory 18'3" Sprit Rig (Leg O'Mutton) - 3-SIDED SAIL
| Luff | 15.67 ft - (4776 mm) |
|---|---|
| Foot | 10.17 ft - (3100 mm) |
| Leech | 15.47 ft - (4715 mm) |
| Tack Ang | 69.9 ° |
| Area | 74.82 ft² |
| Comments | This is a high peaked gunter sail with a sprit boom. Lace the upper part of the luff to the yard. The snotter is secured so the sprit is about 2 feet above the tack at the luff. |
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