Sense 51 Deep draft

Sailboat specifications

The Sense 51 is a 49’1” (14.98m) cruising sailboat designed by Berret Racoupeau Yachts Design (France). She was built between 2016 and 2018 by Bénéteau (France). The Deep draft version offers a deeper L-shaped keel bringing extra performance especially upwind.

The Sense 51 is as well listed, on Boat-Specs.com, in Shoal draft version (see all the versions compared).

Sense 51's main features

Model: Sense 51
Version: Deep draft
Hull type: Monohull
Category: Cruising sailboat
Sailboat builder: Bénéteau
Sailboat designer: Berret Racoupeau Yachts Design
Sailboat range: Sense
Country: France
Construction: GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
First built hull: 2016
Last built hull: 2018
Appendages: Keel : L-shaped keel (with bulb)
Helm: Twin helm wheels
Rudder: Twin spade rudders
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): About
306 000 €
(2017)

Sense 51's main dimensions

Overall length: 52’ 4”15.95 m
Hull length: 49’ 1”14.98 m
Waterline length: 46’ 1”14.05 m
Beam (width): 15’ 11”4.86 m
Draft: 7’ 2”2.2 m
Mast height from D_WL: 74’ 2”22.62 m
Light displacement (M_LC): 34205 lb15515 kg
Ballast weight: 8741 lb3965 kg
Ballast type: Cast iron

Sense 51's rig and sails

Upwind sail area: 1324 ft²123 m²
Downwind sail area: 2669 ft²248 m²
Mainsail area: 678 ft²63 m²
Genoa area: 646 ft²60 m²
Jib area: 495 ft²46 m²
Staysail area: 258 ft²24 m²
Asymmetric spinnaker area: 1991 ft²185 m²
Code 0 area: 1130 ft²105 m²
I iFore triangle height (from mast foot to fore stay top attachment): 65’ 7”20 m
J iFore triangle base (from mast foot to bottom of forestay): 20’ 2”6.15 m
P iMainsail hoist measurement (from tack to head): 62’18.9 m
E iMainsail foot measurement (from tack to clew): 19’ 6”5.95 m
Rigging type: Sloop Marconi masthead
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 2
Spreaders angle: Swept-back
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire

Sense 51'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.: 213 ft²/T19.77 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.: 429 ft²/T39.87 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.: 158
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.: 26 %
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.: 9.10 knots