Didi Mount Gay 30
Description
The Didi Mount Gay 30 is a specific interpretation of the Mount Gay 30 box rule, designed by South African naval architect Dudley Dix (Dudley Dix Yacht Design) in 1998. It's a high-performance plywood racing sailboat optimized for amateur or semi-professional builders using the radius chine plywood construction method—making it relatively straightforward and cost-effective to build at home or in small shops while delivering grand prix-level speed and handling. The design fits the now-defunct Mount Gay 30 rule (sponsored by Mount Gay Rum to promote affordable, competitive 30-foot racers), emphasizing lightweight construction, a powerful fractional rig, and excellent all-around performance for inshore buoy racing, coastal events, or even trans-ocean passages. It's fast upwind (fine entry, deep bulb keel), planes downwind in a breeze, and is easy to handle short-handed thanks to the runnerless rig with swept spreaders. Some builders add custom features like sugar-scoop transoms for extra length or third-party lifting keels. Compared to other Mount Gay 30 variants (e.g., VG-Mount Gay 30 with water ballast options or Lyons designs), the Didi version stands out for its plywood focus, simplicity, and proven amateur-build success (examples in Hungary, Russia, etc.). It's more accessible for DIY enthusiasts than composite grand prix boats yet still delivers serious speed.
Construction Details
| Designer | Dudley Dix |
|---|---|
| Builder | Home Built |
| Length | 31.500 ft |
| LOA | 31.500 ft |
| LWL | 27.670 ft |
| Beam | 10.670 ft |
| Displacement | 6985 lb |
| Ballast | 2535 lb |
| Max Draft | 6.480 ft |
| Year Built | 1998 |
The standard boat dimensions
| i | 37.40 ft |
|---|---|
| j | 11.50 ft |
| p | 41.40 ft |
| e | 14.80 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 37.40 ft | 11.50 ft | 41.40 ft | 14.80 ft | - | - | - | - |
Sails
Didi Mount Gay 30 - JIBSAIL
| Luff | * 28.86 ft - (8797 mm) |
|---|---|
| Foot | * 15.89 ft - (4843 mm) |
| Leech | * 27.28 ft - (8315 mm) |
| Percentage LP | * 128.26 % |
| Length Perpendicular | * 14.75 ft - (4496 mm) |
| Deck Angle | * 3.25 ° |
| Area | * 212.84 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.