Kirk

Sailboat specifications

The Kirk is a 35’2” (10.72m) cruising sailboat designed by Henri Amel (France). She was built between 1971 and 1980 by Amel (France) with 276 hulls completed.

Kirk's main features

Model: Kirk
Hull type: Monohull
Category: Cruising sailboat
Sailboat builder: Amel
Sailboat designer: Henri Amel
Country: France
Construction: Hull and deck: GRP (glass reinforced polyester)
Number of hulls built: 276
First built hull: 1971
Last built hull: 1980
Appendages: Keel : L-shaped keel (with bulb)
Helm: Single tiller
Rudder: Single semi-spade rudder
Unsinkable: No
Trailerable: No
Former French navigation category: 1
Standard public price ex. VAT (indicative only): N/A €

Kirk's main dimensions

Hull length: 35’ 2”10.72 m
Waterline length: 28’ 2”8.6 m
Beam (width): 9’ 11”3.02 m
Waterline beam (width): 9’ 5”2.85 m
Draft: 5’ 4”1.63 m
Mast height from D_WL: 47’ 11”14.6 m
Fore freeboard: 3’ 8”1.13 m
Mid-ship freeboard: 2’ 8”0.83 m
Light displacement (M_LC): 11023 lb5000 kg
Maximum displacement (M_LDC): 14330 lb6500 kg
Ballast weight: 4255 lb1930 kg
Ballast type: Cast iron
French customs tonnage: 9.09 Tx

Kirk's rig and sails

Upwind sail area: 570 ft²53 m²
Downwind sail area: 989 ft²91.85 m²
Mainsail area: 214 ft²19.85 m²
Genoa area: 357 ft²33.15 m²
Jib area: 184 ft²17.1 m²
Stormjib area: 43 ft²4 m²
Symmetric spinnaker area: 775 ft²72 m²
Rigging type: Sloop Marconi masthead
Mast configuration: Deck stepped mast
Rotating spars: No
Number of levels of spreaders: 1
Spreaders angle: 0 °
Spars construction: Aluminum spars
Standing rigging: 1x19 strand wire continuous

Kirk's performances

IOR rating iIOR, or International Offshore Rule, was a measurement rule system used internationally for ocean racing. It allows boats of different sizes and designs to race each other fairly. Therefore, by comparing these values, we can have an indication of the relative speed of 2 boats.: 25.4
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.: 195 ft²/T18.13 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.: 338 ft²/T31.41 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.: 223
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.: 39 %
Wetted area: 296 ft²27.52 m²
Maximum transverse section: 17 ft²1.55 m²
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.: 7.12 knots