Sun Magic 44 Keel and centerboard

Sailboat specifications

The Sun Magic 44 is a 43’ (13.1m) cruising sailboat designed by Andrieu Yacht Design (France). She was built between 1987 and 1993 by Jeanneau (France). The Keel and centerboard version features a centerboard inside of a short fin-keel allowing shoal draft while maintaining upwind capabilities.

The Sun Magic 44 is as well listed, on Boat-Specs.com, in Fin keel version (see all the versions compared).

Sun Magic 44's main features

Model: Sun Magic 44
Version: Keel and centerboard
Hull type: Monohull
Category: Offshore cruising sailboat
Sailboat builder: Jeanneau
Sailboat designer: Andrieu Yacht Design
Country: France
Construction: Hull and deck: GRP (glass reinforced polyester)
Number of hulls built: About 700
First built hull: 1987
Last built hull: 1993
Appendages: Centerboard : pivoting centerboard in the keel
Helm: Single helm wheel
Rudder: Single spade rudder
Unsinkable: No
Trailerable: No
Former French navigation category: 1
Standard public price ex. VAT (indicative only): N/A €

Sun Magic 44's main dimensions

Overall length: 43’ 8”13.33 m
Hull length: 43’13.1 m
Waterline length: 34’ 10”10.6 m
Beam (width): 13’ 11”4.23 m
Waterline beam (width): 10’ 11”3.32 m
Draft: 8’ 4”2.53 m
Draft when appendages up: 4’ 11”1.5 m
Light displacement (M_LC): 23149 lb10500 kg
Ballast weight: 9149 lb4150 kg
Ballast type: Cast iron exterior ballast with steel centerboard
French customs tonnage: 18.30 Tx

Sun Magic 44's rig and sails

Upwind sail area: 1058 ft²98.3 m²
Downwind sail area: 1785 ft²165.8 m²
Mainsail area: 404 ft²37.5 m²
Genoa area: 654 ft²60.8 m²
Solent area: 509 ft²47.25 m²
Jib area: 385 ft²35.8 m²
Stormjib area: 108 ft²10 m²
Symmetric spinnaker area: 1381 ft²128.3 m²
I iFore triangle height (from mast foot to fore stay top attachment): 51’ 6”15.7 m
J iFore triangle base (from mast foot to bottom of forestay): 16’ 7”5.05 m
P iMainsail hoist measurement (from tack to head): 44’ 10”13.65 m
E iMainsail foot measurement (from tack to clew): 15’ 8”4.8 m
Rigging type: Sloop Marconi masthead
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 0 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire discontinuous

Sun Magic 44'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.: 221 ft²/T20.5 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.: 372 ft²/T34.58 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.: 250
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.: 40 %
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.: 7.90 knots