X-55 Shoal draft

Sailboat specifications

The X-55 is a 55’ (16.76m) cruiser-racer sailboat designed by Niels Jeppesen (Denmark). She was built between 2005 and 2012 by X-Yachts (Denmark) with 34 hulls completed. The Shoal draft version features a shorter keel to grant access to shallow areas. She has been awarded "2007 - European Yacht of the Year: L > 14m".

The X-55 is as well listed, on Boat-Specs.com, in Standard and Medium draft version (see all the versions compared).

X-55's main features

Model

X-55

Version

Shoal draft

Hull type

Monohull

Category

Offshore cruiser-racer sailboat

Sailboat builder

X-Yachts

Sailboat designer

Niels Jeppesen

Country

Denmark

Construction

GRP (glass reinforced polyester):
Sandwich fiberglass polyester with galvanized steel frame

Number of hulls built

First built hull

2005

Last built hull

2012

Award(s)

2007: European Yacht of the Year: L > 14m

Appendages

Keel : L-shaped keel (with bulb)

Helm

Twin helm wheels

Rudder

Single spade rudder

Unsinkable

Trailerable

EC design category iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions) A: Wind < force 9, Waves < 10m B: Wind < force 8, Waves < 8m C: Wind < force 6, Waves < 4m D: Wind < force 4, Waves < 0,5m

Standard public price ex. VAT (indicative only)

N/A €

X-55's main dimensions

Hull length: 55’16.76 m
Waterline length: 47’ 5”14.46 m
Beam (width): 15’4.57 m
Draft: 8’ 2”2.5 m
Light displacement (M_LC): 36376 lb16500 kg
Ballast weight: 13228 lb6000 kg

X-55's rig and sails

Upwind sail area: 2003 ft²186.1 m²
Downwind sail area: 3495 ft²324.7 m²
Mainsail area: 1008 ft²93.6 m²
Genoa area: 996 ft²92.5 m²
Solent area: 797 ft²74 m²
Symmetric spinnaker area: 2488 ft²231.1 m²
Rigging type: Sloop Marconi 9/10
Mast configuration: Keel stepped mast
Rotating spars: No
Number of levels of spreaders: 3
Spreaders angle: Swept-back
Spars construction: Aluminum spars (carbon fiber spars as an option)

X-55'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.: 309 ft²/T28.71 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.: 539 ft²/T50.1 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.: 155
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.: 36 %
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.: 9.23 knots