Etap 30 Shoal draft

Sailboat specifications

The Etap 30 is a 29’8” (9.05m) cruising sailboat designed by Jac de Ridder Yacht Design (Netherlands). She was built between 1984 and 1992 by Etap (Belgium) with 220 hulls completed. The Shoal draft version features a shorter keel to grant access to shallow areas.

The Etap 30 is as well listed, on Boat-Specs.com, in Deep draft version (see all the versions compared).

Etap 30's main features

Model: Etap 30
Version: Shoal draft
Hull type: Monohull
Category: Cruising sailboat
Sailboat builder: Etap
Sailboat designer: Jac de Ridder Yacht Design
Country: Belgium
Construction: GRP (glass reinforced polyester):
Sandwich foam fiberglass polyester
Number of hulls built: 220
First built hull: 1984
Last built hull: 1992
Appendages: Keel : fin without bulb
Helm: Single tiller
Rudder: Single semi-spade rudder
Unsinkable: Yes
Trailerable: No
Former French navigation category: 2
Standard public price ex. VAT (indicative only): N/A €

Etap 30's main dimensions

Hull length: 29’ 8”9.05 m
Waterline length: 25’ 11”7.88 m
Beam (width): 10’ 4”3.15 m
Waterline beam (width): 8’ 6”2.6 m
Draft: 4’ 4”1.3 m
Mast height from D_WL: 45’ 4”13.8 m
Fore freeboard: 3’ 11”1.19 m
Mid-ship freeboard: 3’ 6”1.07 m
Light displacement (M_LC): 8025 lb3640 kg
Maximum displacement (M_LDC): 9700 lb4400 kg
Ballast weight: 2921 lb1325 kg
Ballast type: Cast iron

Etap 30's rig and sails

Upwind sail area: 549 ft²50.96 m²
Downwind sail area: 852 ft²79.17 m²
Mainsail area: 259 ft²24.07 m²
Genoa area: 289 ft²26.89 m²
Symmetric spinnaker area: 593 ft²55.1 m²
I iFore triangle height (from mast foot to fore stay top attachment): 33’ 4”10.15 m
J iFore triangle base (from mast foot to bottom of forestay): 11’3.35 m
P iMainsail hoist measurement (from tack to head): 36’ 7”11.15 m
E iMainsail foot measurement (from tack to clew): 12’3.65 m
Rigging type: Sloop Marconi 7/8
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 1
Spreaders angle: Swept-back
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire continuous

Etap 30'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.: 17.0
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.: 232 ft²/T21.54 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.: 360 ft²/T33.46 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.: 211
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.: 36 %
Wetted area: 209 ft²19.41 m²
Righting moment @ 1° iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after heeling. 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.: 452 lb.ft62 kg.m
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.: 6.81 knots