Hallberg-Rassy P-28 MkI

Sailboat specifications

The Hallberg-Rassy P-28 MkI is a 28’2” (8.61m) traditional sailing boat designed by Harry Hallberg (Sweden). She was built between 1955 and 1973 by Hallberg-Rassy (Sweden) with 536 hulls completed.

Hallberg-Rassy P-28 MkI's main features

Model: Hallberg-Rassy P-28 MkI
Hull type: Monohull
Category: Traditional sailing boat
Sailboat builder: Hallberg-Rassy
Sailboat designer: Harry Hallberg
Country: Sweden
Construction: Hull and deck: wood or GRP
Number of hulls built: 536
First built hull: 1955
Last built hull: 1973
Appendages: Keel : semi-full keel
Helm: Single tiller
Rudder: Single rudder on skeg
Unsinkable: No
Trailerable: No
Standard public price ex. VAT (indicative only): N/A €

Hallberg-Rassy P-28 MkI's main dimensions

Hull length: 28’ 2”8.61 m
Waterline length: 21’ 6”6.55 m
Beam (width): 7’ 8”2.35 m
Draft: 4’ 2”1.28 m
Light displacement (M_LC): 5952 lb2700 kg
Ballast weight: 2866 lb1300 kg
Ballast type: Steel incapsulated in deep GRP bilge

Hallberg-Rassy P-28 MkI's rig and sails

Upwind sail area: 425 ft²39.48 m²
Downwind sail area: 714 ft²66.36 m²
Mainsail area: 230 ft²21.36 m²
Genoa area: 195 ft²18.12 m²
Jib area: 105 ft²9.75 m²
Symmetric spinnaker area: 484 ft²45 m²
Rigging type: Sloop Marconi masthead
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 1
Spreaders angle: 0 °
Spars construction: Spruce or oregon pine spars
Standing rigging: 1x19 strand wire continuous

Hallberg-Rassy P-28 MkI'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.: 219 ft²/T20.36 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.: 368 ft²/T34.22 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.: 272
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 %
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.: 6.21 knots