The Finn belongs to the ISAF class.
|Finn's Main Features|
|Type of hull||Monohull|
|Construction||GRP (glass reinforced polyester)|
|First built hull||1949|
|Last built hull||Still in production|
|Rudder||1 transom hung rudder|
|Cockpit||Closed aft cockpit|
|Standard public price ex. VAT (indicative only)||About
14 600 €(2017)
|Finn's Main dimensions|
|Hull length||14’ 10”|
|Beam (width)||4’ 10”|
|Draft when appendages up||0’ 7”|
|Light displacement||256 lbs|
|Finn's Rig and sails|
|Upwind sail area||114 sq.ft|
|Mainsail area||114 sq.ft|
|Rigging type||Cat Boat Marconi|
|Mast position||Mast foot integrated on deck|
|Spars||Mast and boom in Carbon fiber|
|Standing rigging||No standing rigging|
|PY (Portsmouth Yardstick) ratingiPortsmouth Yardstick is an empirical system of handicapping used for small sailboat (dinghies included).||1060|
|D-PN ratingiDPN is a variation of Portsmouth Yardstick used in the United States.||90.1|
|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.
|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.
|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.