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Sailboat specifications and datasheets

Dehler 42 shoal draft

The Dehler 42, here in "shoal draft" version, is a 40’8” monohull sailboat designed by Fietje Judel and Rolf E. Vrolijk. She was built by Dehler (Germany) and made of sandwich PVC / fiberglass with carbon fiber reinforcements. The production started in 2016 .

The Dehler 42 is as well listed, on Boat-Specs.com, in version Standard and Competition.

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Dehler 42's   Main Features
Model Dehler 42
Version Shoal draft
Type of hull Monohull
Category Cruiser-racer sailboat
Shipyard
Designer Fietje Judel
Rolf E. Vrolijk
Construction Hull and deck:
sandwich PVC / fiberglass with carbon fiber reinforcements
First built hull 2016
Last built hull Still in production
Appendages Keel :
Fin with bulb
Helm 2 wheels
Rudder 1 spade rudder
Cockpit Open aft cockpit with closing system
Unsinkable No
Trailerable No
EC certification A
Standard public price ex. VAT (indicative only) About
189 000
(2017)
Dehler 42's   Main dimensions
Length overall 42’ 1”
Hull length 40’ 8”
Waterline length 37’ 8”
Beam (width) 12’ 10”
Draft 6’ 6”
Mast height from DWL 64’
Light displacement 20613 lbs
Ballast weight 7165 lbs
Ballast type Cast iron
Dehler 42's   Rig and sails
Upwind sail area 1001 sq.ft
Downwind sail area 1959 sq.ft
Mainsail area 560 sq.ft
Genoa area 441 sq.ft
Symetric spinnaker area 1399 sq.ft
Asymetric spinnaker area 1292 sq.ft
Code 0 area 775 sq.ft
Rigging type Sloop Marconi 9/10
Rotating spars No
Mast position Keel stepped mast
Spars Mast and boom in Aluminum (carbon fiber as an option)
Standing rigging Dyform
Number of levels of spreaders 2
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 53’ 11”
JiFore triangle base (from mast foot to bottom of forestay) 15’ 2”
PiMainsail hoist measurement (from tack to head) 52’ 10”
EiMainsail foot measurement (from tack to clew) 18’ 8”
Dehler 42's   Performances
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.
20.95
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.
41.01
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.
174
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 %
Righting moment @ 30°iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. Its value corresponds to the torque needed to heel the boat for this angle.
Higher the righting moment is for an angle, greater is the stability at this angle.
36165 lbs.ft
Maximum righting momentiThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. Its value corresponds to the torque needed to heel the boat for this angle.
Higher the righting moment is for an angle, greater is the stability at this angle.
41228 lbs.ft @ 50.00 °
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.
8.23 knots
Dehler 42's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 38 HP
Fuel type Diesel
Fuel tank capacity 42.3 gal
Dehler 42's   Accommodation
Cabin(s) (min/max) 2 / 3
Berth(s) (min/max) 4 / 8
Head(s) (min/max) 1 / 2
Fresh water tank capacity 83.2 gal
Water heater capacity 5.3 gal
Fridge/ice-box capacity 34.3 gal

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