**First 235**, here in "

*swing keel*" version, is a 21’7”

**monohull sailboat**designed by

*Jean Marie Finot*and

*Pascal Conq*. She was built by

*Bénéteau*(France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1986 and 1994 with 680 hulls completed.

The **First 235** belongs to the *First* range. The **First 235** is as well listed, on Boat-Specs.com, in version Fin keel.

First 235's Main Features | |
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Model | First 235 |

Version | Swing keel |

Type of hull | Monohull |

Shipyard | |

Designer | Jean Marie Finot Pascal Conq |

Range | First |

Construction | Hull: monolithic fiberglass / polyester Deck: sandwich balsa / fiberglass / polyester |

First built hull | 1986 |

Last built hull | 1994 |

Number of hulls built | 680 |

Appendages | Keel (lifting) : Swing keel |

Helm | 1 tiller |

Rudder | 1 spade rudder |

Unsinkable | No |

Trailerable | Yes |

French navigation category | 3 |

Standard public price (indicative only) | N/A |

First 235's Main dimensions | |
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Length overall | 23’ 5” |

Hull length | 21’ 7” |

Waterline length | 20’ 11” |

Beam (width) | 8’ 2” |

Waterline beam (width) | 6’ 10” |

Draft | 5’ 8” |

Draft when appendages up | 2’ 2” |

Mast height from DWL | 34’ 7” |

Fore freeboard | 3’ 1” |

Mid-ship freeboard | 2’ 8” |

Light displacement | 3064 lbs |

Maximum displacement | 4034 lbs |

Ballast weight | 794 lbs |

Ballast type | Cast iron |

French customs tonnage | 4.20 Tx |

First 235's Rig and sails | |
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Upwind sail area | 346 sq.ft |

Downwind sail area | 549 sq.ft |

Mainsail area | 158 sq.ft |

Genoa area | 188 sq.ft |

Jib area | 82 sq.ft |

Symetric spinnaker area | 391 sq.ft |

Rigging type | Sloop Marconi 7/8 |

Mast position | Deck stepped mast |

Spars | Mast and boom in Aluminum |

Standing rigging | 1x19 strand wire continuous |

Number of levels of spreaders | 1 |

Spreaders angle | Swept-back |

IiFore triangle height (from mast foot to fore stay attachment) |
27’ 10” |

JiFore triangle base (from mast foot to bottom of forestay) |
7’ 11” |

PiMainsail hoist measurement (from tack to head) |
26’ 7” |

EiMainsail foot measurement (from tack to clew) |
10’ 4” |

First 235's Performances | |
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HN (French rating) | 12.0 |

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. |
25.84 |

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. |
153 |

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. |
26 % |

Wetted surface | 128 sq.ft |

Righting moment @ 1°iThe righting moment is a moment (torque) that tends to restore a boat to its previous position after a rotational displacement. 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 at this angle. |
180 lbs.ft |

Maximum transverse section | 6 sq.ft |

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. |
6.12 knots |

First 235's Auxiliary engine | |
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Engine(s) | 1 |

Engine type | Outboard engine |

Engine | 10 HP |

Fuel type | Gas |

First 235's Accommodation | |
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Cabin(s) | 1 |

Berth(s) (min/max) | 2 / 4 |

Head(s) | 1 |

Fresh water tank capacity | 13.2 gal |

Chart table | 2’ 2” x 2’ 1” |

Maximum headroom | 5’ 6” |

Galley headroom | 5’ 5” |

First 235's Saloon | |
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Maximum headroom | 5’ 2” |

Saloon table length | 3’ 2” |

Saloon table width (min/max) | 1’ 4” / 2’ |

Berth length | 6’ 2” |

Berth width (head/feet) | 5’ 2” 1’ 7” |

First 235's Aft cabin | |
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Berth length | 6’ 2” |

Berth width (head/feet) | 4’ 1” 2’ 10” |