The Rival 41, designed by Peter Brett and built in the UK by Southern Boatbuilding Company, was produced with a number of accommodation layouts and rig configurations.
There were centre and aft cockpit versions, along with a sloop, cutter, and ketch rig alternatives. The centre cockpit version was more often rigged as a ketch.
It's the centre-cockpit version (known as the Rival 41CC) that's shown in the pic below and described in the text that follows it.
Underwater Profile: Fin and skeg-supported rudder
Hull Material: GRP (Fiberglass)
Length Overall: 40'7" (12.4m)
Waterline Length: 32'8" (10.0m)
Beam: 12'2" (3.7m)
Draft: 5'11" (1.8m)
Rig Type: Masthead sloop
Displacement: 22,046lb (10,000kg)
Designer: Peter Brett
Builder: Southern Boatbuilding Company (UK)
Year First Built: 1974
Year Last Built: 1990
Number Built: 57
Owners Association: Rival Owners Association
1. Sail Area/Displacement Ratio: 16.1
2. Ballast/Displacement Ratio: 44.5
3. Displacement/Length Ratio: 282
4. Comfort Ratio: 34.9
5. Capsize Screening Formula: 1.7
1. A Sail Area/Displacement Ratio of 16.1 suggests that the Rival 41 will, in the right conditions, approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.
2. A Ballast/Displacement Ratio of 44.5 means that the Rival 41 will stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 282, tells us the xxxxx is a heavy displacement cruising boat. You can load her down with all your cruising gear and equipment and it will hardly affect her waterline. Not an ideal choice for coastal sailing, but she'll come into her own on an offshore passage in testing conditions.
4. Ted Brewer's Comfort Ratio of 34.9 suggests that crew comfort of a Rival 41 in a seaway is similar to what you would associate with the motion of a moderate bluewater cruising boat - a predictable and acceptable motion for most seasoned sailors.
5. The Capsize Screening Formula (CSF) of 1.7 tells us that a Rival 41 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
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