X4³ Deep draft

Sailboat specifications

The X4³ is a 41’ (12.5m) fast cruising sailboat designed by Niels Jeppesen (Denmark). She is built since 2016 by X-Yachts (Denmark). The Deep draft version features a deeper T-shaped keel to grant extra performance especially upwind. She has been awarded "2017 - Cruising World - Boat of the Year: Full-Size Cruiser Under 50 Feet".

The X4³ is as well listed, on Boat-Specs.com, in Standard and Shoal draft version (see all the versions compared).

Find out more about the X4³ on Boat-Spec's blog: European Yacht of the Year 2017.

X4³'s main features

Model

X4³

Version

Deep draft

Hull type

Monohull

Category

Offshore fast cruising sailboat

Sailboat builder

X-Yachts

Sailboat designer

Niels Jeppesen

Sailboat range

Country

Denmark

Construction

Fiberglass reinforced epoxy:
Sandwich E-glass epoxy

First built hull

2016

Last built hull

Still in production

Award(s)

2017: Cruising World - Boat of the Year: Full-Size Cruiser Under 50 Feet

Appendages

Keel : T-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)

About

300 000 €

(2020)

X4³'s main dimensions

Hull length: 41’12.5 m
Waterline length: 37’ 1”11.31 m
Beam (width): 13’3.95 m
Draft: 8’ 2”2.5 m
Light displacement (M_LC): 19511 lb8850 kg
Ballast weight: 8378 lb3800 kg
Ballast type: Steel fin with lead bulb

X4³'s rig and sails

Upwind sail area: 1044 ft²97 m²
Downwind sail area: 2196 ft²204 m²
Mainsail area: 581 ft²54 m²
Genoa area: 463 ft²43 m²
Asymmetric spinnaker area: 1615 ft²150 m²
Rigging type: Sloop Marconi 9/10
Mast configuration: Keel stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: Swept-back
Spars construction: Aluminum spars (carbon fiber spars as an option)

X4³'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.: 244 ft²/T22.67 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.: 513 ft²/T47.68 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.: 173
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.: 43 %
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.: 8.16 knots