The **X-402** is a 39’8” (12.09m) racer-cruiser sailboat designed by *Niels Jeppesen* (Denmark). She was built between 1984 and 1990 by *X-Yachts* (Denmark) with 79 hulls completed.

- Model
- X-402
- Hull type
- Monohull
- Category
- Racer-cruiser sailboat
- Sailboat builder
- Sailboat designer
- Country
- Denmark
- Construction
- Hull and deck: GRP (glass reinforced polyester)
- Number of hulls built
- 79
- First built hull
- 1984
- Last built hull
- 1990
- Appendages
- Keel : fin without bulb
- Helm
- Single helm wheel
- Rudder
- Single spade rudder
- Unsinkable
- No
- Trailerable
- No
- Former French navigation category
- 1
- Standard public price ex. VAT (indicative only)
- N/A €

- Hull length
- 39’ 8”12.09 m
- Waterline length
- 33’ 2”10.11 m
- Beam (width)
- 12’ 11”3.94 m
- Draft
- 7’ 5”2.25 m
- Light displacement (M
_{LC}) - 13228 lb6000 kg
- Ballast weight
- 6834 lb3100 kg

- Upwind sail area
- 681 ft²63.3 m²
- I
*iFore triangle height (from mast foot to fore stay top attachment)* - 52’ 4”15.95 m
- J
*iFore triangle base (from mast foot to bottom of forestay)* - 15’ 5”4.7 m
- P
*iMainsail hoist measurement (from tack to head)* - 45’ 11”14 m
- E
*iMainsail foot measurement (from tack to clew)* - 13’ 1”4 m
- Rigging type
- Sloop Marconi fractional
- Mast configuration
- Keel stepped mast
- Rotating spars
- No
- Number of levels of spreaders
- 2
- Spreaders angle
- Swept-back
- Spars construction
- Aluminum spars
- Standing rigging
- 1x19 strand wire continuous

- 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. - 206 ft²/T19.17 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. - 164
- 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. - 52 %
- 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. - 7.72 knots

- Engine(s)
- 1 inboard engine
- Engine(s) power
- 40 HP
- Fuel type
- Diesel
- Fuel tank capacity
- 26.4 gal100 liters

- Cockpit
- Closed aft cockpit
- Cabin(s)
- 2
- Berth(s) (min./max.)
- 4 / 6
- Head(s)
- 1
- Freshwater tank capacity
- 54.2 gal205 liters

Sailboats

First built hull

Hull length

1988

52’ 6”16 m

2006

40’ 6”12.35 m

2004

40’12.19 m

2006

35’ 10”10.9 m

2017

40’12.2 m

1985

41’ 1”12.52 m

1985

32’ 7”9.95 m

1985

41’ 1”12.52 m

2000

39’ 8”12.1 m

2018

38’ 7”11.78 m

1984

35’ 8”10.87 m

2006

34’ 8”10.59 m

2014

34’ 8”10.59 m

2014

35’ 5”10.8 m

2003

39’ 2”11.95 m