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.

- 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 €

- 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 (M
_{LC}) - 87964 lb39900 kg
- Ballast weight
- 30865 lb14000 kg

- 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

- 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

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

- 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

Sailboats

First built hull

Hull length

1988

52’ 6”16 m

2010

63’ 1”19.22 m

2014

64’ 1”19.55 m

2011

65’ 1”19.85 m

2014

79’ 2”24.14 m

2005

70’ 2”21.4 m

2016

63’19.19 m

2015

67’ 4”20.5 m

2014

65’ 4”19.89 m

2014

71’ 8”21.86 m

2008

66’20.12 m

2017

50’ 11”15.51 m

2016

69’ 10”21.26 m

2012

71’ 6”21.8 m

2007

68’ 11”21.01 m