| Main features | Oyster SJ41 Mast head rigging | Oyster SJ41 Fractional rigging |
Model | Oyster SJ41 | Oyster SJ41 |
Version | Mast head rigging | Fractional rigging |
Hull type | Monohull | Monohull |
Category | Offshore cruiser-racer sailboat | Offshore cruiser-racer sailboat |
Sailboat builder | Oyster | Oyster |
Sailboat designer | ||
Sailboat collection | ||
Country | United Kingdom | United Kingdom |
Construction | Hull and deck: GRP (glass reinforced polyester) | Hull and deck: GRP (glass reinforced polyester) |
Number of hulls built | 23 | 23 |
First built hull | 1980 | 1980 |
Last built hull | 1987 | 1987 |
Appendages | Keel : fin without bulb | Keel : fin without bulb |
Helm | Single helm wheel | Single helm wheel |
Rudder | Single rudder on skeg | Single rudder on skeg |
Unsinkable | No | No |
Trailerable | No | No |
| Main dimensions | Oyster SJ41 Mast head rigging | Oyster SJ41 Fractional rigging |
Hull length | 39’ 8”12.09 m | 39’ 8”12.09 m |
Waterline length | 33’ 7”10.25 m | 33’ 7”10.25 m |
Beam (width) | 13’ 7”4.15 m | 13’ 7”4.15 m |
Draft | 6’ 11”2.1 m | 6’ 11”2.1 m |
Light displacement (MLC) | 17086 lb7750 kg | 17086 lb7750 kg |
Ballast weight | 7716 lb3500 kg | 7716 lb3500 kg |
Ballast type | Lead | Lead |
| Rig and sails | Oyster SJ41 Mast head rigging | Oyster SJ41 Fractional rigging |
Upwind sail area | 648 ft²60.2 m² | 648 ft²60.2 m² |
Rigging type | Sloop Marconi masthead | Sloop Marconi 3/4 |
Rotating spars | No | No |
Number of levels of spreaders | 2 | 2 |
Spreaders angle | 0 ° | 0 ° |
Running backstays | 2 set(s) | |
Spars construction | Aluminum spars | Aluminum spars |
Standing rigging | 1x19 strand wire | 1x19 strand wire |
| Performances | Oyster SJ41 Mast head rigging | Oyster SJ41 Fractional rigging |
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. | 165 ft²/T15.37 m²/T | 165 ft²/T15.37 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. | 204 | 204 |
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. | 45 % | 45 % |
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. | 7.77 knots | 7.77 knots |
| Auxiliary engine | Oyster SJ41 Mast head rigging | Oyster SJ41 Fractional rigging |
Engine(s) | 1 inboard engine | 1 inboard engine |
Fuel type | Diesel | Diesel |
Fuel tank capacity | 13.2 gal50 liters | 13.2 gal50 liters |
| Accommodations and layout | Oyster SJ41 Mast head rigging | Oyster SJ41 Fractional rigging |
Cockpit | Closed aft cockpit | Closed aft cockpit |
Cabin(s) | 2 | 2 |
Berth(s) (min./max.) | 6 / 8 | 6 / 8 |
Head(s) | 1 | 1 |
Freshwater tank capacity | 46.2 gal175 liters | 46.2 gal175 liters |
Maximum headroom | 6’ 1”1.86 m | 6’ 1”1.86 m |