| Main features | Copain Fin keel | Copain Keel and centerboard |
Model | Copain | Copain |
Version | Fin keel | Keel and centerboard |
Hull type | Monohull | Monohull |
Category | Cruising sailboat | Cruising sailboat |
Sailboat builder | Amel | Amel |
Sailboat designer | ||
Country | France | France |
Construction | Hull and deck: GRP (glass reinforced polyester) | Hull and deck: GRP (glass reinforced polyester) |
Number of hulls built | About 50 | About 50 |
First built hull | 1962 | 1962 |
Last built hull | 1968 | 1968 |
Appendages | Keel : fin without bulb | Centerboard : pivoting centerboard in the keel |
Helm | Single tiller | Single tiller |
Rudder | Single transom hung rudder | Single transom hung rudder |
Unsinkable | Yes | Yes |
Trailerable | Yes | Yes |
| Main dimensions | Copain Fin keel | Copain Keel and centerboard |
Hull length | 17’ 2”5.25 m | 17’ 2”5.25 m |
Waterline length | 16’4.88 m | 16’4.88 m |
Beam (width) | 5’ 11”1.8 m | 5’ 11”1.8 m |
Waterline beam (width) | 5’ 4”1.62 m | 5’ 4”1.62 m |
Draft | 3’0.9 m | 3’ 4”1.02 m |
Draft when appendages up | 1’ 10”0.56 m | |
Light displacement (MLC) | 1058 lb480 kg | 1058 lb480 kg |
Ballast weight | 397 lb180 kg | 397 lb180 kg |
| Rig and sails | Copain Fin keel | Copain Keel and centerboard |
Upwind sail area | 172 ft²16 m² | 172 ft²16 m² |
Downwind sail area | 269 ft²25 m² | 269 ft²25 m² |
Mainsail area | 75 ft²7 m² | 75 ft²7 m² |
Genoa area | 97 ft²9 m² | 97 ft²9 m² |
Solent area | 65 ft²6 m² | 65 ft²6 m² |
Jib area | 32 ft²3 m² | 32 ft²3 m² |
Symmetric spinnaker area | 194 ft²18 m² | 194 ft²18 m² |
Rigging type | Sloop Marconi masthead | Sloop Marconi masthead |
Mast configuration | Deck stepped mast | Deck stepped mast |
Rotating spars | No | No |
Number of levels of spreaders | 1 | 1 |
Spreaders angle | 0 ° | 0 ° |
Spars construction | Aluminum spars | Aluminum spars |
Standing rigging | 1x19 strand wire continuous | 1x19 strand wire continuous |
| Performances | Copain Fin keel | Copain Keel and centerboard |
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. | 281 ft²/T26.1 m²/T | 281 ft²/T26.1 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. | 439 ft²/T40.78 m²/T | 439 ft²/T40.78 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. | 117 | 117 |
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. | 38 % | 38 % |
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. | 5.36 knots | 5.36 knots |
| Auxiliary engine | Copain Fin keel | Copain Keel and centerboard |
Engine(s) | 1 outboard engine | 1 outboard engine |
Engine(s) power (min./max.) | 3 HP / 5 HP | 3 HP / 5 HP |
Fuel type | Gas | Gas |
| Accommodations and layout | Copain Fin keel | Copain Keel and centerboard |
Cockpit | Closed aft cockpit | Closed aft cockpit |
Berth(s) | 2 | 2 |