20' x 5'6" ultra simple light weight stitch and glue sharpie. Can be constructed in 3 sections for easy transport and storage. Also optional cubby and water ballast tank. Pre-shaped side and bottom hull panels are stitched and taped together with ply frames. The dagger/lee board is slotted into cases which are kept to the sides of the boat leaving the central section clear for sleeping under the cubby and a boom tent. All spars are kept to short lengths for easy stepping and all fittings have been kept to a minimum.

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Swan 20 Particulars |
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| LOD | 20' | 6.1m |
| Beam | 5'6" | 1.68m |
| Hull Mid Depth | 1'10" | 0.56m |
| Draft | 6"/2'7" | 0.15/0.79m |
| Sail Area | 131 sq.ft | 12.18 sq.m |
| Approx. Dry Weight | 375 lbs | 170 kg |
| Ballast (water) | 240 lbs | 109 kg |
| Maximum Headroom | 3'4" with small cuddy | 1.02m |
| Hull Shape | Sharpie type - flat bottom - single chine | |
| Construction Methods | Stitch and tape | |
| Major plywood requirements for hull | 6 x 6mm sheets 3 x 9mm sheets |
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| Guidance Use | Estuary, coastal | |
| Drawing/Design Package | 3 x A1 drawings + 9 x A4 instruction sheets | |
| Additions and alterations included with the plans | ||