Detailed sailboat specifications and datasheets since 2015
MetricSI (m)
Imperial & Metricboth
ImperialIMP (ft)

First 35.7 (Wing keel) vs First 35.7 (Deep draft) vs First 35.7 (Lead keel)

Main featuresFirst 35.7 Wing keelFirst 35.7 Deep draftFirst 35.7 Lead keel
Model
First 35.7
First 35.7
First 35.7
Version
Wing keel
Deep draft
Lead keel
Hull type
Monohull
Monohull
Monohull
Category
Cruiser-racer sailboat
Cruiser-racer sailboat
Cruiser-racer sailboat
Sailboat builder
Bénéteau
Bénéteau
Bénéteau
Sailboat designer
Sailboat range
Country
France
France
France
Construction
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester
- Deck: Sandwich balsa fiberglass polyester
First built hull
1992
1992
1992
Last built hull
Discontinued
Discontinued
Discontinued
Appendages
Keel : wing keel
Keel : L-shaped keel (with bulb)
Keel : fin without bulb
Helm
Single tiller
Single tiller
Single tiller
Rudder
Single spade rudder
Single spade rudder
Single spade rudder
Unsinkable
No
No
No
Trailerable
No
No
No
Former French navigation category
1
1
1
 
Main dimensionsFirst 35.7 Wing keelFirst 35.7 Deep draftFirst 35.7 Lead keel
Overall length
35’ 7”10.85 m
35’ 7”10.85 m
35’ 7”10.85 m
Hull length
34’ 7”10.55 m
34’ 7”10.55 m
34’ 7”10.55 m
Waterline length
31’ 1”9.48 m
31’ 1”9.48 m
31’ 1”9.48 m
Beam (width)
12’ 6”3.8 m
12’ 6”3.8 m
12’ 6”3.8 m
Draft
5’1.53 m
6’ 1”1.85 m
6’ 5”1.95 m
Light displacement (MLC)
11684 lb5300 kg
11684 lb5300 kg
11684 lb5300 kg
Ballast weight
3748 lb1700 kg
3748 lb1700 kg
3748 lb1700 kg
Ballast type
Cast iron
Cast iron
Lead
 
Rig and sailsFirst 35.7 Wing keelFirst 35.7 Deep draftFirst 35.7 Lead keel
Upwind sail area
765 ft²71.1 m²
765 ft²71.1 m²
765 ft²71.1 m²
Downwind sail area
1253 ft²116.4 m²
1253 ft²116.4 m²
1253 ft²116.4 m²
Mainsail area
360 ft²33.4 m²
360 ft²33.4 m²
360 ft²33.4 m²
Genoa area
406 ft²37.7 m²
406 ft²37.7 m²
406 ft²37.7 m²
Symmetric spinnaker area
893 ft²83 m²
893 ft²83 m²
893 ft²83 m²
Rigging type
Sloop Marconi 7/8
Sloop Marconi 7/8
Sloop Marconi 7/8
Mast configuration
Keel stepped mast
Keel stepped mast
Keel stepped mast
Rotating spars
No
No
No
Number of levels of spreaders
2
2
2
Spreaders angle
Swept-back
Swept-back
Swept-back
Spars construction
Aluminum spars
Aluminum spars
Aluminum spars
Standing rigging
1x19 strand wire discontinuous
1x19 strand wire discontinuous
1x19 strand wire discontinuous
 
PerformancesFirst 35.7 Wing keelFirst 35.7 Deep draftFirst 35.7 Lead keel
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.
252 ft²/T23.39 m²/T
252 ft²/T23.39 m²/T
252 ft²/T23.39 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.
412 ft²/T38.29 m²/T
412 ft²/T38.29 m²/T
412 ft²/T38.29 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.
176
176
176
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.
32 %
32 %
32 %
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.
7.47 knots
7.47 knots
7.47 knots
 
Auxiliary engineFirst 35.7 Wing keelFirst 35.7 Deep draftFirst 35.7 Lead keel
Engine(s)
1 inboard engine
1 inboard engine
1 inboard engine
Engine(s) power
28 HP
28 HP
28 HP
Fuel type
Diesel
Diesel
Diesel
Fuel tank capacity
23.8 gal90 liters
23.8 gal90 liters
23.8 gal90 liters
 
Accommodations and layoutFirst 35.7 Wing keelFirst 35.7 Deep draftFirst 35.7 Lead keel
Cockpit
Closed aft cockpit
Closed aft cockpit
Closed aft cockpit
Cabin(s) (min./max.)
2 / 3
2 / 3
2 / 3
Berth(s) (min./max.)
4 / 8
4 / 8
4 / 8
Head(s)
1
1
1
Freshwater tank capacity
79.3 gal300 liters
79.3 gal300 liters
79.3 gal300 liters
Fridge/ice-box capacity
26.4 gal100 liters
26.4 gal100 liters
26.4 gal100 liters
Boiler capacity
5.8 gal22 liters
5.8 gal22 liters
5.8 gal22 liters
 
Fore cabinFirst 35.7 Wing keelFirst 35.7 Deep draftFirst 35.7 Lead keel
Berth length
7’ 2”2.2 m
7’ 2”2.2 m
7’ 2”2.2 m
Berth width
5’ 7”1.7 m
5’ 7”1.7 m
5’ 7”1.7 m
 
Aft cabinFirst 35.7 Wing keelFirst 35.7 Deep draftFirst 35.7 Lead keel
Berth length
6’ 7”2 m
6’ 7”2 m
6’ 7”2 m
Berth width
4’ 7”1.4 m
4’ 7”1.4 m
4’ 7”1.4 m
 
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