| Main features | Swan 47 Fin keel | Swan 47 Keel and centerboard |
Model | Swan 47 | Swan 47 |
Version | Fin keel | Keel and centerboard |
Hull type | Monohull | Monohull |
Category | Offshore cruiser-racer sailboat | Offshore cruiser-racer sailboat |
Sailboat builder | Nautor's Swan | Nautor's Swan |
Sailboat designer | ||
Country | Finland | Finland |
Construction | GRP (glass reinforced polyester): - Hull: Single skin fiberglass polyester - Deck: Sandwich fiberglass polyester | GRP (glass reinforced polyester): - Hull: Single skin fiberglass polyester - Deck: Sandwich fiberglass polyester |
Number of hulls built | About 70 | About 70 |
First built hull | 1974 | 1974 |
Last built hull | 1979 | 1979 |
Appendages | Keel : fin without bulb | Centerboard : pivoting centerboard in the keel |
Helm | Single helm wheel | Single helm wheel |
Rudder | Single rudder on skeg | Single rudder on skeg |
Unsinkable | No | No |
Trailerable | No | No |
| Main dimensions | Swan 47 Fin keel | Swan 47 Keel and centerboard |
Hull length | 47’ 10”14.57 m | 47’ 10”14.57 m |
Waterline length | 36’ 4”11.05 m | 36’ 4”11.05 m |
Beam (width) | 13’ 8”4.19 m | 13’ 8”4.19 m |
Draft | 7’ 7”2.33 m | 9’ 6”2.9 m |
Draft when appendages up | 5’ 11”1.8 m | |
Mast height from DWL | 66’ 10”20.35 m | 66’ 10”20.35 m |
Light displacement (MLC) | 32408 lb14700 kg | 34172 lb15500 kg |
Ballast weight | 15432 lb7000 kg | 17196 lb7800 kg |
Ballast type | Lead | Lead |
| Rig and sails | Swan 47 Fin keel | Swan 47 Keel and centerboard |
Upwind sail area | 1366 ft²126.9 m² | 1366 ft²126.9 m² |
Downwind sail area | 2652 ft²246.4 m² | 2652 ft²246.4 m² |
Mainsail area | 446 ft²41.4 m² | 446 ft²41.4 m² |
Genoa area | 920 ft²85.5 m² | 920 ft²85.5 m² |
Symmetric spinnaker area | 2207 ft²205 m² | 2207 ft²205 m² |
I iFore triangle height (from mast foot to fore stay top attachment) | 62’18.9 m | 62’18.9 m |
J iFore triangle base (from mast foot to bottom of forestay) | 19’ 10”6.04 m | 19’ 10”6.04 m |
P iMainsail hoist measurement (from tack to head) | 55’ 8”16.98 m | 55’ 8”16.98 m |
E iMainsail foot measurement (from tack to clew) | 16’4.88 m | 16’4.88 m |
Rigging type | Sloop Marconi masthead | Sloop Marconi masthead |
Mast configuration | Keel stepped mast | Keel stepped mast |
Rotating spars | No | No |
Number of levels of spreaders | 2 | 2 |
Spreaders angle | 0 ° | 0 ° |
Spars construction | Aluminum spars | Aluminum spars |
Standing rigging | Single-strand (ROD) discontinuous | Single-strand (ROD) discontinuous |
| Performances | Swan 47 Fin keel | Swan 47 Keel and centerboard |
IOR rating iIOR, or International Offshore Rule, was a measurement rule system used internationally for ocean racing. It allows boats of different sizes and designs to race each other fairly. Therefore, by comparing these values, we can have an indication of the relative speed of 2 boats. | 34.5 | 34.5 |
Upwind sail area to displacement iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size. Upwind: under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 25 it indicates a fast sailboat. | 228 ft²/T21.15 m²/T | 220 ft²/T20.41 m²/T |
Downwind sail area to displacement iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size. | 442 ft²/T41.06 m²/T | 427 ft²/T39.64 m²/T |
Displacement-length ratio (DLR) iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).The DLR can be used to compare the relative mass of different sailboats no matter what their length: a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat. | 309 | 325 |
Ballast ratio iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.The higher the ballast ratio is, the greater is the stability. | 48 % | 50 % |
Wetted area | 506 ft²47 m² | 506 ft²47 m² |
Critical hull speed iAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed".The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34. | 8.07 knots | 8.07 knots |
| Auxiliary engine | Swan 47 Fin keel | Swan 47 Keel and centerboard |
Engine(s) | 1 inboard engine | 1 inboard engine |
Engine(s) power | 61 HP | 61 HP |
Fuel type | Diesel | Diesel |
Fuel tank capacity | 52.8 gal200 liters | 52.8 gal200 liters |
| Accommodations and layout | Swan 47 Fin keel | Swan 47 Keel and centerboard |
Cockpit | Twin cockpit (center and closed aft) | Twin cockpit (center and closed aft) |
Cabin(s) | 2 | 2 |
Berth(s) (min./max.) | 7 / 9 | 7 / 9 |
Head(s) | 2 | 2 |
Freshwater tank capacity | 92.5 gal350 liters | 92.5 gal350 liters |
Fridge/ice-box capacity | 66 gal250 liters | 66 gal250 liters |