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Sailboat specifications and datasheets

IMX 40

The IMX 40 is a 39’8” monohull sailboat designed by Niels Jeppesen. She was built by X-Yachts (Denmark) and made of sandwich Divinicell / fiberglass / vinylester vaccum bagged. This sailboat was produced between 2000 and 2004 with 99 hulls completed.

The IMX 40 belongs to the IMX range.

X-Yachts IMX 40 X-Yachts IMX 40 layoutX-Yachts IMX 40 layoutX-Yachts IMX 40 sailingX-Yachts IMX 40 accommodations
IMX 40's   Main Features
Model IMX 40
Type of hull Monohull
Shipyard
Designer Niels Jeppesen
Range IMX
Construction Hull and deck:
sandwich Divinicell / fiberglass / vinylester vaccum bagged with galvanised steel frame
First built hull 2000
Last built hull 2004
Number of hulls built 99
Appendages Keel :
Fin with bulb
Helm 1 wheel
Rudder 1 spade rudder
Unsinkable No
Trailerable No
EC certification A
Standard public price ex. VAT (indicative only) N/A
IMX 40's   Main dimensions
Hull length 39’ 8”
Waterline length 34’ 5”
Beam (width) 12’ 6”
Draft 8’
Light displacement 15058 lbs
Ballast weight 5291 lbs
Ballast type Cast iron fin with lead bulb
IMX 40's   Rig and sails
Upwind sail area 1099 sq.ft
Downwind sail area 1826 sq.ft
Mainsail area 518 sq.ft
Genoa area 581 sq.ft
Solent area 434 sq.ft
Jib area 346 sq.ft
Symetric spinnaker area 1308 sq.ft
Rigging type Sloop Marconi 9/10
Mast position Keel stepped mast
Spars Mast and boom in Carbon fiber
Standing rigging Single-strand (ROD)
Number of levels of spreaders 3
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 52’ 6”
JiFore triangle base (from mast foot to bottom of forestay) 14’ 10”
PiMainsail hoist measurement (from tack to head) 49’ 11”
EiMainsail foot measurement (from tack to clew) 18’
IMX 40's   Performances
HN (French rating) 31.5
Upwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
28.36
Downwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
47.11
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. 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 ratioiThe Ballast ratio is an indicator of the stability; it is obtained by dividing the boat's displacement by the weight of the ballast. Since the stability depends also of the hull shape and the position of the center of gravity, only boats with similar ballast arrangements and hull shape should be considered.
Higher the ballast ratio is, greater is the stability.
35 %
Hull speediAs 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
IMX 40's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 39 HP
Fuel type Diesel
Fuel tank capacity 25.1 gal
IMX 40's   Accommodation
Cabin(s) 3
Head(s) 1
Fresh water tank capacity 50.2 gal
Maximum headroom 6’ 2”

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