Albin Nimbus 42 Keel and centerboard

Sailboat specifications

The Albin Nimbus 42 is a 41’4” (12.6m) cruiser-racer sailboat designed by Kaufman & Ladd (United States). She was built between 1981 and 1985 by Albin Marine (Sweden). The Keel and centerboard version features a centerboard inside of a short fin-keel allowing shoal draft while maintaining upwind capabilities.

The Albin Nimbus 42 is as well listed, on Boat-Specs.com, in Standard and Race version (see all the versions compared).

Albin Nimbus 42's main features

Model: Albin Nimbus 42
Version: Keel and centerboard
Hull type: Monohull
Category: Offshore cruiser-racer sailboat
Sailboat builder: Albin Marine
Sailboat designer: Kaufman & Ladd
Country: Sweden
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich Airex fiberglass polyester
First built hull: 1981
Last built hull: 1985
Appendages: Centerboard : pivoting centerboard in the keel
Helm: Single helm wheel
Rudder: Single rudder on skeg
Unsinkable: No
Trailerable: No
Standard public price ex. VAT (indicative only): N/A €

Albin Nimbus 42's main dimensions

Hull length: 41’ 4”12.6 m
Waterline length: 34’ 1”10.4 m
Beam (width): 12’ 6”3.8 m
Waterline beam (width): 10’ 10”3.3 m
Draft: 4’ 11”1.5 m
Mast height from D_WL: 58’ 1”17.7 m
Light displacement (M_LC): 21499 lb9752 kg
Ballast weight: 10000 lb4536 kg

Albin Nimbus 42's rig and sails

Upwind sail area: 871 ft²80.9 m²
Mainsail area: 385 ft²35.8 m²
Genoa area: 485 ft²45.1 m²
I iFore triangle height (from mast foot to fore stay top attachment): 54’16.46 m
J iFore triangle base (from mast foot to bottom of forestay): 18’5.49 m
P iMainsail hoist measurement (from tack to head): 49’14.94 m
E iMainsail foot measurement (from tack to clew): 15’4.57 m
Rigging type: Cutter Marconi masthead
Mast configuration: Keel stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 0 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire

Albin Nimbus 42'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.: 191 ft²/T17.72 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.: 245
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.: 47 %
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.: 7.83 knots