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Sailboat specifications and datasheets

Tonic 23 keel and centerboard

The Tonic 23, here in "keel and centerboard" version, is a 22’7” monohull sailboat designed by Philippe Harlé. She was built by Jeanneau (France) and made of monolithic fiberglass / polyester. This sailboat was produced between 1985 and 1992 with about 750 hulls completed.

The Tonic 23 is as well listed, on Boat-Specs.com, in version Fin keel.

Jeanneau Tonic 23 Jeanneau Tonic 23 sailplanJeanneau Tonic 23 layoutJeanneau Tonic 23 sailingJeanneau Tonic 23 sailingJeanneau Tonic 23 accommodations
Tonic 23's   Main Features
Model Tonic 23
Version Keel and centerboard
Type of hull Monohull
Shipyard
Designer Philippe Harlé
Construction Hull:
monolithic fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1985
Last built hull 1992
Number of hulls built About 750
Appendages Centerboard :
Centerboard in the keel
Helm 1 tiller
Rudder 1 transom hung rudder
Unsinkable No
Trailerable Yes
French navigation category 3
Standard public price (indicative only) N/A
Tonic 23's   Main dimensions
Length overall 24’
Hull length 22’ 7”
Waterline length 20’ 4”
Beam (width) 8’ 2”
Waterline beam (width) 7’ 2”
Draft 4’ 6”
Draft when appendages up 2’ 4”
Mast height from DWL 38’ 5”
Fore freeboard 3’ 4”
Mid-ship freeboard 2’ 11”
Light displacement 2932 lbs
Maximum displacement 4101 lbs
Ballast weight 1058 lbs
Ballast type Cast iron exterior ballast with steel centerboard
French customs tonnage 4.48 Tx
Tonic 23's   Rig and sails
Upwind sail area 316 sq.ft
Downwind sail area 521 sq.ft
Mainsail area 157 sq.ft
Genoa area 159 sq.ft
Solent area 140 sq.ft
Jib area 86 sq.ft
Stormjib area 43 sq.ft
Symetric spinnaker area 364 sq.ft
Rigging type Sloop Marconi fractional
Spars Mast and boom in Aluminum
Standing rigging Continuous
Number of levels of spreaders 1
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 23’ 7”
JiFore triangle base (from mast foot to bottom of forestay) 7’ 11”
PiMainsail hoist measurement (from tack to head) 27’ 11”
EiMainsail foot measurement (from tack to clew) 10’
Tonic 23's   Performances
HN (French rating) 9.0
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.
24.31
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.
40.02
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.
158
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.
36 %
Wetted surface 133 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.
192 lbs.ft
Maximum transverse section 7 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.
6.04 knots
Tonic 23's   Auxiliary engine
Engine(s) 1
Engine type Outboard engine
Engine 10 HP
Tonic 23's   Accommodation
Cabin(s) 1
Berth(s) 4
Head(s) 1
Fresh water tank capacity 5.3 gal
Chart table 2’ 2” x 2’ 1”
Maximum headroom 5’ 10”
Galley headroom 5’ 5”
Head headroom 5’ 6”
Tonic 23's   Saloon
Maximum headroom 5’ 4”
Saloon table length 3’ 5”
Saloon table width (min/max) 1’ 11” / 2’ 6”
Tonic 23's   Fore cabin
Maximum headroom 4’ 1”
Berth length 6’ 7”
Berth width 5’ 7”
Tonic 23's   Aft cabin
Berth length 6’ 2”
Berth width 4’ 4”

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