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Sailboat specifications and datasheets

Océanis 51.1 deep draft

The Océanis 51.1, here in "deep draft" version, is a 49’1” monohull sailboat designed by Jean Berret and Olivier Racoupeau. She was built by Bénéteau (France) and made of sandwich balsa / fiberglass / polyester (composite infusion). The production started in 2017 .

The Océanis 51.1 belongs to the Océanis range. The Océanis 51.1 is as well listed, on Boat-Specs.com, in version Shoal draft and Performance.

Bénéteau Océanis 51.1 Bénéteau Océanis 51.1 sailplanBénéteau Océanis 51.1 layoutBénéteau Océanis 51.1 layoutBénéteau Océanis 51.1 layoutBénéteau Océanis 51.1 layoutBénéteau Océanis 51.1 sailingBénéteau Océanis 51.1 sailingBénéteau Océanis 51.1 sailingBénéteau Océanis 51.1 cockpitBénéteau Océanis 51.1 accommodationsBénéteau Océanis 51.1 accommodationsBénéteau Océanis 51.1 accommodations
Océanis 51.1's   Main Features
Model Océanis 51.1
Version Deep draft
Type of hull Monohull
Category Offshore cruising sailboat
Shipyard
Designer Jean Berret
Olivier Racoupeau
Range Océanis
Construction Hull:
sandwich balsa / fiberglass / polyester (composite infusion)
Deck:
sandwich foam / fiberglass / polyester (injection molding process)
First built hull 2017
Last built hull Still in production
Appendages Keel :
T-shaped keel (with bulb)
Helm 2 wheels
Rudder 2 spade rudders
Cockpit Open aft cockpit
Unsinkable No
Trailerable No
EC certification A
Standard public price ex. VAT (indicative only) About
275 000
(2017)
Océanis 51.1's   Main dimensions
Length overall 50’ 7”
Hull length 49’ 1”
Waterline length 47’ 7”
Beam (width) 15’ 8”
Draft 7’ 8”
Mast height from DWL 70’ 2”
Light displacement 30710 lbs
Ballast weight 7487 lbs
Ballast type Cast iron
Océanis 51.1's   Rig and sails
Upwind sail area 1313 sq.ft
Downwind sail area 2551 sq.ft
Mainsail area 614 sq.ft
Genoa area 700 sq.ft
Asymetric spinnaker area 1938 sq.ft
Code 0 area 1485 sq.ft
Rigging type Sloop Marconi 9/10
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum (carbon fiber as an option)
Standing rigging 1x19 strand wire
Number of levels of spreaders 2
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 60’ 1”
JiFore triangle base (from mast foot to bottom of forestay) 20’ 8”
PiMainsail hoist measurement (from tack to head) 57’ 8”
EiMainsail foot measurement (from tack to clew) 18’
Océanis 51.1'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.
21.07
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.
40.94
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.
129
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.
24 %
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.
9.25 knots
Océanis 51.1's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 80 HP / 110 HP
Fuel type Diesel
Fuel tank capacity 52.8 gal
Océanis 51.1's   Accommodation
Cabin(s) (min/max) 3 / 5
Berth(s) (min/max) 6 / 12
Head(s) (min/max) 2 / 4
Fresh water tank capacity 116.2 gal
Water heater capacity 10.6 gal
Holding tank capacity 42.3 gal
Fridge/ice-box capacity 60.8 gal
Galley headroom 6’ 5”
Head headroom 6’ 1”
Océanis 51.1's   Saloon
Maximum headroom 6’ 8”
Océanis 51.1's   Fore cabin
Maximum headroom 6’ 5”
Berth length 6’ 8”
Berth width (head/feet) 5’ 2”
4’
Océanis 51.1's   Aft cabin
Maximum headroom 6’ 6”
Berth length 6’ 11”
Berth width 5’ 2”

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