X-37 Shoal draft

Sailboat specifications

The X-37 is a 37’2” (11.35m) cruiser-racer sailboat designed by Niels Jeppesen (Denmark). She was built between 2004 and 2010 by X-Yachts (Denmark) with 148 hulls completed. The Shoal draft version features a shorter keel to grant access to shallow areas.

The X-37 is as well listed, on Boat-Specs.com, in Standard and Sport version (see all the versions compared).

X-37's main features

Model: X-37
Version: Shoal draft
Hull type: Monohull
Category: Cruiser-racer sailboat
Sailboat builder: X-Yachts
Sailboat designer: Niels Jeppesen
Country: Denmark
Construction: GRP (glass reinforced polyester):
Sandwich fiberglass polyester
Number of hulls built: 148
First built hull: 2004
Last built hull: 2010
Appendages: Keel : L-shaped keel (with bulb)
Helm: Single helm wheel
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 €

X-37's main dimensions

Hull length: 37’ 2”11.35 m
Waterline length: 32’ 1”9.79 m
Beam (width): 11’ 5”3.48 m
Draft: 5’ 7”1.7 m
Mast height from D_WL: 60’ 5”18.4 m
Light displacement (M_LC): 14110 lb6400 kg
Ballast weight: 5986 lb2715 kg
French customs tonnage: 12.99 Tx

X-37's rig and sails

Upwind sail area: 932 ft²86.6 m²
Downwind sail area: 1620 ft²150.5 m²
Mainsail area: 470 ft²43.7 m²
Genoa area: 462 ft²42.9 m²
Solent area: 369 ft²34.3 m²
Jib area: 293 ft²27.2 m²
Symmetric spinnaker area: 1150 ft²106.8 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

X-37'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.: 270 ft²/T25.12 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.: 470 ft²/T43.66 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.: 193
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.: 42 %
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.: 7.59 knots