KD 650
Description
The KD 650 (also written as KD650) is a lightweight, affordable, amateur-built trailerable catamaran designed by Bernd Kohler (a German multihull specialist via his K-designs series, available through sites like ikarus342000.org and Duckworks). Introduced as a DIY-friendly design for coastal sailing, it emphasizes easy construction (plywood/epoxy stitch-and-glue or similar methods), quick setup/teardown for trailering, good performance (relative seaworthiness and speed for its size), and simple accommodations (bunks for 4 persons in a compact layout). The rig is often a modernized one-halyard Gunter rig (some builders use second-hand or alternative rigs), and the hulls are asymmetric for efficiency. It's built for amateur builders, with a focus on value and fun rather than high-end racing or bluewater. The KD 650 (also written as KD650) is a lightweight, affordable, amateur-built trailerable catamaran designed by Bernd Kohler (a German multihull specialist via his K-designs series, available through sites like ikarus342000.org and Duckworks). Introduced as a DIY-friendly design for coastal sailing, it emphasizes easy construction (plywood/epoxy stitch-and-glue or similar methods), quick setup/teardown for trailering, good performance (relative seaworthiness and speed for its size), and simple accommodations (bunks for 4 persons in a compact layout). The rig is often a modernized one-halyard Gunter rig (some builders use second-hand or alternative rigs), and the hulls are asymmetric for efficiency. It's built for amateur builders, with a focus on value and fun rather than high-end racing or bluewater.
Construction Details
| Designer | Bernd Kohler |
|---|---|
| Builder | Home Built |
| Length | 22.000 ft |
| LOA | 21.330 ft |
| Beam | 13.330 ft |
| Displacement | 1675 lb |
| Max Draft | 1.770 ft |
| Min Draft | 1.080 ft |
The standard boat dimensions
| i | 12.45 ft |
|---|---|
| j | 7.77 ft |
| p | 21.49 ft |
| e | 9 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 12.45 ft | 7.77 ft | 21.49 ft | 9 ft | - | - | - | - |
Sails
KD 650 - MAINSAIL
| Luff | * 21.49 ft - (6550 mm) |
|---|---|
| Foot | * 9 ft - (2743 mm) |
| Leech | * 22.82 ft - (6956 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 23.01 ft - (7013 mm) |
| Head (inches) | * 4 in - (102 mm) |
| Area | * 99.79 ft² |
| Edit in Calculator |
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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