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Sailboat specifications and datasheets

Contest 250C

The Contest 250C is a 24’7” monohull sailboat designed by Jac De Ridder. She was built by Conyplex (Netherlands) and made of single skin fiberglass / polyester. This sailboat was produced between 1982 and 1985.

The Contest 250C belongs to the Contest Yachts range.

Conyplex  Contest 250C Conyplex  Contest 250C layout
Contest 250C's   Main Features
Model Contest 250C
Type of hull Monohull
Category Coastal cruising sailboat
Shipyard
Designer Jac De Ridder
Range Contest Yachts
Construction Hull:
single skin fiberglass / polyester
Deck:
sandwich balsa / fiberglass / polyester
First built hull 1982
Last built hull 1985
Appendages Keel :
Fin without bulb
Helm 1 tiller
Rudder 1 transom hung rudder
Cockpit Closed aft cockpit
Unsinkable No
Trailerable No
Standard public price ex. VAT (indicative only)
N/A
Contest 250C's   Main dimensions
Length overall 24’ 7”
Hull length 24’ 7”
Waterline length 20’ 6”
Beam (width) 9’
Draft 4’ 11”
Light displacement 3858 lbs
Ballast weight 1510 lbs
Ballast type Cast iron
Contest 250C's   Rig and sails
Upwind sail area 369 sq.ft
Downwind sail area 590 sq.ft
Mainsail area 170 sq.ft
Genoa area 199 sq.ft
Jib area 136 sq.ft
Symmetric spinnaker area 420 sq.ft
Rigging type Sloop Marconi 7/8
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire continuous
Number of levels of spreaders 1
Contest 250C's   Performances
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.
23.62
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.
37.74
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.
203
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.
39 %
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.
6.07 knots
Contest 250C's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Fuel type Diesel
Fuel tank capacity 11.9 gal
Contest 250C's   Accommodation
Cabin(s) 1
Berth(s) (min/max) 2 / 4
Head(s) 1
Fresh water tank capacity 15.3 gal

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