Hallberg-Rassy 312 MkII

Sailboat specifications

The Hallberg-Rassy 312 MkII is a 30’11” (9.42m) cruising sailboat designed by Christoph Rassy (Germany) and Olle Enderlein (Sweden). She was built between 1986 and 1993 by Hallberg-Rassy (Sweden) with 205 hulls completed.

Hallberg-Rassy 312 MkII's main features

Model: Hallberg-Rassy 312 MkII
Hull type: Monohull
Category: Cruising sailboat
Sailboat builder: Hallberg-Rassy
Sailboat designer: Christoph Rassy & Olle Enderlein
Country: Sweden
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich fiberglass polyester
Number of hulls built: 205
First built hull: 1986
Last built hull: 1993
Appendages: Keel : fin without bulb
Helm: Single helm wheel
Rudder: Single semi-spade rudder
Unsinkable: No
Trailerable: No
Standard public price ex. VAT (indicative only): N/A €

Hallberg-Rassy 312 MkII's main dimensions

Hull length: 30’ 11”9.42 m
Waterline length: 25’ 4”7.7 m
Beam (width): 10’ 1”3.08 m
Draft: 5’ 4”1.62 m
Mast height from D_WL: 45’13.73 m
Light displacement (M_LC): 10803 lb4900 kg
Ballast weight: 4850 lb2200 kg
Ballast type: Steel incapsulated in deep GRP bilge

Hallberg-Rassy 312 MkII's rig and sails

Upwind sail area: 603 ft²56 m²
Mainsail area: 237 ft²22 m²
Genoa area: 366 ft²34 m²
Solent area: 280 ft²26 m²
Jib area: 199 ft²18.5 m²
Rigging type: Sloop Marconi masthead
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 1
Spreaders angle: Swept-back
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire continuous

Hallberg-Rassy 312 MkII's performances

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.: 209 ft²/T19.41 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.: 304
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 %
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.: 6.74 knots