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 *Medium draft* version offers a compromise between draft and performance. 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 Shoal draft version (see all the versions compared).

The

- Model
- X-55
- Version
- Medium draft
- Hull type
- Monohull
- Category
- Offshore cruiser-racer sailboat
- Sailboat builder
- Sailboat designer
- Country
- Denmark
- Construction
- GRP (glass reinforced polyester):

Sandwich fiberglass polyester with galvanized steel frame - Number of hulls built
- 34
- First built hull
- 2005
- Last built hull
- 2012
- Award(s)
- 2007:
*European Yacht of the Year: L > 14m*

- 2007:
- Appendages
- Keel : L-shaped keel (with bulb)
- Helm
- Twin helm wheels
- Rudder
- Single spade rudder
- Unsinkable
- No
- Trailerable
- No
- 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 - A
- Standard public price ex. VAT (indicative only)
- N/A €

- Hull length
- 55’16.76 m
- Waterline length
- 47’ 5”14.46 m
- Beam (width)
- 15’4.57 m
- Draft
- 9’ 6”2.9 m
- Light displacement (M
_{LC}) - 36376 lb16500 kg
- Ballast weight
- 13228 lb6000 kg

- 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)

- 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

- Engine(s)
- 1 inboard engine
- Fuel type
- Diesel

- Cockpit
- Open aft cockpit
- Cabin(s) (min./max.)
- 3 / 5
- Berth(s) (min./max.)
- 5 / 10
- Head(s) (min./max.)
- 3 / 4

Sailboats

First built hull

Hull length

2004

48’ 11”14.9 m

1988

52’ 6”16 m

2002

55’ 5”16.9 m

2014

58’ 1”17.7 m

2004

50’15.24 m

2005

55’16.76 m

1996

47’ 7”14.5 m

1990

51’ 1”15.59 m

1999

55’ 8”16.98 m

2011

49’ 8”15.15 m

2000

52’ 6”16 m

2017

50’ 11”15.51 m

1990

51’ 8”15.75 m

2003

46’14.01 m

2019

52’ 5”15.98 m