Grampian SailboatsGrampian 46
Designed by William Tripp Jr. — about 12 built starting in the mid-sixties.
Photos
The molds for this boat's hull have just been located and are available for sale.
Specifications
| L.O.A. | 46' | Hull | Fiberglass |
|---|---|---|---|
| L.W.L. | 31' 3" | Power | 55hp diesel |
| Beam | 12' | Displacement | 25,000 lbs |
| Draft — C/B Up | 4' 11" | Berths | 6–8 |
| Draft — C/B Down | 10' 1" | Designer | Bill Tripp Jr |
Sail Area
| Main | 348 sq ft |
|---|---|
| Mizzen | 135 sq ft |
| Jib | 335 sq ft |
| Genoa #1 | 668 sq ft |
| Genoa #2 | 478 sq ft |
| Genoa #3 | 357 sq ft |
Specifications on sailboatdata.com
Figures are transcribed from the sailboatdata.com record linked below and may differ from the owners’ figures elsewhere on this page. Metric values are theirs.
| Hull type | Keel/centreboard | Rig | Masthead yawl |
|---|---|---|---|
| L.O.A. | 46.00 ft / 14.02 m | L.W.L. | 33.00 ft / 10.06 m |
| Beam | 12.00 ft / 3.66 m | Draft | 10.33 ft / 3.15 m (board down); 5.16 ft / 1.57 m (up) |
| Displacement | 25,000 lb / 11,340 kg | Ballast | 9,000 lb / 4,082 kg (lead) |
| Sail area (reported) | 881 ft² / 81.85 m² | Construction | Fibreglass |
| First built | 1969 | Last built | 1976 |
| Number built | 12 | Builder | Grampian Marine |
| Designer | William H. Tripp Jr. |
Rig and sail particulars
| I | 47.62 ft / 14.51 m | J | 16.67 ft / 5.08 m |
|---|---|---|---|
| P | 41.00 ft / 12.50 m | E | 17.00 ft / 5.18 m |
| PY (mizzen) | 26.50 ft / 8.08 m | EY (mizzen) | 10.25 ft / 3.12 m |
| S.A. fore | 396.91 ft² / 36.87 m² | S.A. main | 348.50 ft² / 32.38 m² |
| S.A. total (100% fore + main) | 745.41 ft² / 69.25 m² | S.A. / Displ. (from rig) | 14.00 |
| Est. forestay length | 50.45 ft / 15.38 m |
Calculated ratios
| S.A. / Displ. | 16.55 | Bal. / Displ. | 36.00 |
|---|---|---|---|
| Displ. / Length | 310.56 | Comfort ratio | 38.26 |
| Capsize screening | 1.64 | S# | 1.44 |
| Hull speed | 7.70 kn | Pounds / inch immersion | 1,414.95 |
Their notes: Apart from the unique option of tandem centreboards, the Grampian 46 seems to be nearly the same design as the US 46; both are probably from the tooling used for the earlier US 41.
Source: Grampian 46 — sailboatdata.com. Ratio definitions are on sailboatdata.