GRP (glass reinforced polyester): Single skin fiberglass polyester
First built hull
Last built hull
Centerboard : pivoting centerboard
Single transom hung rudder
Standard public price ex. VAT (indicative only)
Sun Club 9's main dimensions
9’ 2”2.8 m
4’ 5”1.33 m
2’ 2”0.68 m
Draft when appendages up
1’ 2”0.38 m
Light displacement (MLC)
93 lb42 kg
Sun Club 9's rig and sails
Upwind sail area
45 ft²4.2 m²
45 ft²4.2 m²
Cat boat Marconi
Mast foot integrated on deck
Free standing mast: no standing rigging
Sun Club 9's performances
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.
374 ft²/T34.76 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.
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.