Detailed sailboat specifications and datasheets since 2015
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First 36s7 Wing keel

Sailboat specifications

The First 36s7 is a 34’5” (10.49m) cruiser-racer sailboat designed by Jean Berret (France). She was built between 1995 and 1998 by Bénéteau (France). The Wing keel version is offered with a short keel fitted with large winglets. This configuration provides an interesting draft / low center of gravity / upwind performance trade-off.

The First 36s7 is as well listed, on Boat-Specs.com, in Deep draft and Regatta version (see all the versions compared).

First 36s7's main features

Model
First 36s7
Version
Wing keel
Hull type
Monohull
Category
Cruiser-racer sailboat
Sailboat builder
Sailboat designer
Sailboat range
Country
France
Construction
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
Number of hulls built
About 50
First built hull
1995
Last built hull
1998
Appendages
Keel : wing keel
Helm
Single tiller
Rudder
Single spade rudder
Unsinkable
No
Trailerable
No
Former French navigation category
1
Standard public price ex. VAT (indicative only)
N/A

First 36s7's main dimensions

Overall length
35’ 10”10.9 m
Hull length
34’ 5”10.49 m
Waterline length
31’ 2”9.52 m
Beam (width)
12’ 6”3.8 m
Draft
5’ 1”1.55 m
Light displacement (MLC)
12787 lb5800 kg
Ballast weight
3748 lb1700 kg
French customs tonnage
12.60 Tx

First 36s7's rig and sails

Upwind sail area
791 ft²73.5 m²
Downwind sail area
1222 ft²113.5 m²
Mainsail area
355 ft²33 m²
Genoa area
436 ft²40.5 m²
Symmetric spinnaker area
866 ft²80.5 m²
I
 iFore triangle height (from mast foot to fore stay top attachment)
44’ 7”13.6 m
J
 iFore triangle base (from mast foot to bottom of forestay)
13’3.95 m
P
 iMainsail hoist measurement (from tack to head)
41’ 8”12.7 m
E
 iMainsail foot measurement (from tack to clew)
15’ 1”4.6 m
Rigging type
Sloop Marconi 9/10
Mast configuration
Keel stepped mast
Rotating spars
No
Number of levels of spreaders
2
Spreaders angle
Swept-back
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire discontinuous

First 36s7'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.
245 ft²/T22.77 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.
378 ft²/T35.16 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.
190
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.
29 %
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.
7.49 knots

First 36s7's auxiliary engine

Engine(s)
1 inboard engine
Fuel type
Diesel
Fuel tank capacity
23.8 gal90 liters

First 36s7's accommodations and layout

Cockpit
Closed aft cockpit
Cabin(s) (min./max.)
2 / 3
Berth(s) (min./max.)
4 / 8
Head(s)
1
Freshwater tank capacity
79.3 gal300 liters
Fridge/ice-box capacity
26.4 gal100 liters
Boiler capacity
5.8 gal22 liters
Maximum headroom
6’ 2”1.9 m

First 36s7's fore cabin

Berth length
7’ 2”2.2 m
Berth width
5’ 7”1.7 m

First 36s7's aft cabin

Berth length
6’ 7”2 m
Berth width
4’ 7”1.4 m
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