Detailed sailboat specifications and datasheets since 2015
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X-73

Sailboat specifications

The X-73 is a 72’ (21.95m) fast cruising sailboat designed by Niels Jeppesen (Denmark). She was built between 2001 and 2001 by X-Yachts (Denmark) with 2 hulls completed.

X-73's main features

Model
X-73
Hull type
Monohull
Category
Offshore fast cruising sailboat
Sailboat builder
Sailboat designer
Country
Denmark
Construction
GRP (glass reinforced polyester):
Sandwich fiberglass polyester with galvanized steel frame
Number of hulls built
2
First built hull
2001
Last built hull
2001
Appendages
Keel : L-shaped keel (with bulb)
Helm
Twin helm wheels
Rudder
Twin spade rudders
Unsinkable
No
Trailerable
No
Standard public price ex. VAT (indicative only)
N/A

X-73's main dimensions

Overall length
73’ 7”22.43 m
Hull length
72’21.95 m
Waterline length
63’ 1”19.24 m
Beam (width)
19’ 8”6 m
Draft
10’ 6”3.2 m
Light displacement (MLC)
87964 lb39900 kg
Ballast weight
30865 lb14000 kg

X-73's rig and sails

Upwind sail area
2588 ft²240.4 m²
Downwind sail area
4684 ft²435.2 m²
Mainsail area
1401 ft²130.2 m²
Jib area
1186 ft²110.2 m²
Gennaker area
3283 ft²305 m²
Code 5 area
3283 ft²305 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
92’ 4”28.12 m
J
 iFore triangle base (from mast foot to bottom of forestay)
27’ 11”8.5 m
P
 iMainsail hoist measurement (from tack to head)
86’ 11”26.5 m
E
 iMainsail foot measurement (from tack to clew)
28’ 11”8.8 m
Rigging type
Sloop Marconi fractional
Mast configuration
Keel stepped mast
Rotating spars
No
Number of levels of spreaders
3
Spreaders angle
Swept-back
Spars construction
Carbon fiber spars

X-73'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.
222 ft²/T20.59 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.
401 ft²/T37.27 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.
159
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.
35 %
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.
10.65 knots

X-73's auxiliary engine

Engine(s)
2 inboard engines
Engine(s) power (min./max.)
100 HP / 225 HP
Fuel type
Diesel
Fuel tank capacity
383 gal1450 liters

X-73's accommodations and layout

Cockpit
Closed aft cockpit
Cabin(s)
4
Berth(s) (min./max.)
10 / 12
Head(s)
4
Holding tank capacity
132.1 gal500 liters
Fridge/ice-box capacity
63.4 gal240 liters
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