|Hallberg-Rassy 312 MkII's Main Features|
|Model||Hallberg-Rassy 312 MkII|
|Type of hull||Monohull|
monolithic fiberglass / polyester
sandwich fiberglass / polyester
|First built hull||1986|
|Last built hull||1993|
|Number of hulls built||205|
Fin without bulb
|Rudder||1 semi-spade rudder|
|Cockpit||Closed aft cockpit|
|Standard public price ex. VAT (indicative only)||N/A|
|Hallberg-Rassy 312 MkII's Main dimensions|
|Hull length||30’ 11”|
|Waterline length||25’ 4”|
|Beam (width)||10’ 1”|
|Mast height from DWL||45’|
|Light displacement||10803 lbs|
|Ballast weight||4850 lbs|
|Ballast type||Cast iron|
|Hallberg-Rassy 312 MkII's Rig and sails|
|Upwind sail area||603 sq.ft|
|Mainsail area||237 sq.ft|
|Genoa area||366 sq.ft|
|Solent area||280 sq.ft|
|Jib area||199 sq.ft|
|Rigging type||Sloop Marconi masthead|
|Mast position||Deck stepped mast|
|Spars||Mast and boom in Aluminum|
|Standing rigging||1x19 strand wire continuous|
|Number of levels of spreaders||1|
|Hallberg-Rassy 312 MkII's Performances|
|Upwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
|Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. 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.
|Ballast ratioiThe Ballast ratio is an indicator of the stability; it is obtained by dividing the boat's displacement by the weight of the ballast. Since the stability depends also of the hull shape and the position of the center of gravity, only boats with similar ballast arrangements and hull shape should be considered.
Higher the ballast ratio is, greater is the stability.
|Hull speediAs 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.
|Hallberg-Rassy 312 MkII's Auxiliary engine|
|Engine type||Inboard engine|
|Fuel tank capacity||29.1 gal|
|Hallberg-Rassy 312 MkII's Accommodation|
|Berth(s) (min/max)||4 / 5|
|Fresh water tank capacity||31.7 gal|
|Fridge/ice-box capacity||21.1 gal|
|Maximum headroom||6’ 1”|
|Head headroom||5’ 11”|
|Hallberg-Rassy 312 MkII's Fore cabin|
|Berth length||6’ 5”|
|Hallberg-Rassy 312 MkII's Aft cabin|
|Berth length||6’ 7”|