Etap 39s Shoal draft

Sailboat specifications

The Etap 39s is a 38’1” (11.6m) cruising sailboat designed by J&J Design (Slovenia). She was built between 1998 and 2005 by Etap (Belgium). The Shoal draft version features a shorter keel to grant access to shallow areas.

The Etap 39s is as well listed, on Boat-Specs.com, in Deep draft version (see all the versions compared).

Etap 39s's main features

Model: Etap 39s
Version: Shoal draft
Hull type: Monohull
Category: Cruising sailboat
Sailboat builder: Etap
Sailboat designer: J&J Design
Country: Belgium
Construction: GRP (glass reinforced polyester):
Sandwich foam fiberglass polyester
First built hull: 1998
Last built hull: 2005
Appendages: Keel : L-shaped keel (with bulb)
Helm: Single helm wheel
Rudder: Single spade rudder
Unsinkable: Yes
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 €

Etap 39s's main dimensions

Overall length: 39’11.88 m
Hull length: 38’ 1”11.6 m
Waterline length: 33’ 6”10.2 m
Beam (width): 12’ 7”3.85 m
Waterline beam (width): 10’ 7”3.22 m
Draft: 4’ 11”1.5 m
Mast height from D_WL: 57’ 1”17.4 m
Light displacement (M_LC): 14991 lb6800 kg
Ballast weight: 4519 lb2050 kg
Ballast type: Lead

Etap 39s's rig and sails

Upwind sail area: 835 ft²77.6 m²
Downwind sail area: 1221 ft²113.4 m²
Mainsail area: 443 ft²41.2 m²
Genoa area: 392 ft²36.4 m²
Jib area: 161 ft²15 m²
Stormjib area: 70 ft²6.5 m²
Asymmetric spinnaker area: 777 ft²72.2 m²
I iFore triangle height (from mast foot to fore stay top attachment): 43’ 4”13.2 m
J iFore triangle base (from mast foot to bottom of forestay): 12’ 1”3.7 m
P iMainsail hoist measurement (from tack to head): 46’ 7”14.2 m
E iMainsail foot measurement (from tack to clew): 16’ 7”5.05 m
Rigging type: Sloop Marconi 7/8
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: 18 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire

Etap 39s'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.: 233 ft²/T21.62 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.: 340 ft²/T31.59 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.: 181
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.: 30 %
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.: 7.75 knots