IMX 40

Sailboat specifications

The IMX 40 is a 39’8” (12.1m) racer-cruiser sailboat designed by Niels Jeppesen (Denmark). She was built between 2000 and 2004 by X-Yachts (Denmark) with 99 hulls completed.

IMX 40's main features

Model: IMX 40
Hull type: Monohull
Category: Racer-cruiser sailboat
Sailboat builder: X-Yachts
Sailboat designer: Niels Jeppesen
Sailboat range: IMX
Country: Denmark
Construction: GRP (glass reinforced polyester):
Sandwich Divinicell fiberglass vinylester
Number of hulls built: 99
First built hull: 2000
Last built hull: 2004
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 €

IMX 40's main dimensions

Hull length: 39’ 8”12.1 m
Waterline length: 34’ 5”10.49 m
Beam (width): 12’ 6”3.8 m
Draft: 8’2.45 m
Light displacement (M_LC): 15058 lb6830 kg
Ballast weight: 5291 lb2400 kg
Ballast type: Cast iron fin with lead bulb

IMX 40's rig and sails

Upwind sail area: 1099 ft²102.1 m²
Downwind sail area: 1826 ft²169.6 m²
Mainsail area: 518 ft²48.1 m²
Genoa area: 581 ft²54 m²
Solent area: 434 ft²40.3 m²
Jib area: 346 ft²32.1 m²
Symmetric spinnaker area: 1308 ft²121.5 m²
I iFore triangle height (from mast foot to fore stay top attachment): 52’ 6”16 m
J iFore triangle base (from mast foot to bottom of forestay): 14’ 10”4.5 m
P iMainsail hoist measurement (from tack to head): 49’ 11”15.2 m
E iMainsail foot measurement (from tack to clew): 18’5.5 m
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: Carbon fiber spars
Standing rigging: Single-strand (ROD)

IMX 40's performances

HN (French rating) iHN or "Handicap Nationale" is an empirical rating system used in France allowing various monohulls, of different sizes and designs, to race each other fairly. It is particularly suitable for cruiser and cruiser-racer. Therefore, by comparing these values, we can have an indication of the relative speed of 2 boats.: 31.5
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.: 305 ft²/T28.36 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.: 507 ft²/T47.11 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.: 168
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.: 7.86 knots