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Review of Rival 22


Basic specs.

boat specifications
The Rival 22 is a sailboat designed by the maritime architect Erik Liedstrand.

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Rig
The boat has a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a genaker or a spinnaker for optimal speed.

Keel
The keel is made of lead. Compared with iron, lead has the advantage of being 44% heavier, which allow a minor keel and hence less water resistance and higher speed. The boat can enter even shallow marinas as the draft is just about 1.45 - 1.55 meter (4.76 - 5.06 ft) dependent on the load. See immersion rate below.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

Stability and Safety
What is Capsize Screening Formula (CSF)?
The capsize screening value for Rival 22 is 1.75, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

Theoretical Maximum Hull Speed
What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 7.0 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

Immersion rate
The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Rival 22 is about 134 kg/cm, alternative 755 lbs/inch.
Meaning: if you load 134 kg cargo on the boat then it will sink 1 cm. Alternative, if you load 755 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 22,000 boat types and 350,000 data points.

Motion Comfort Ratio
What is Motion Comfort Ratio (MCR)?
The Motion Comfort Ratio for Rival 22 is 19.9.

Low High 14% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 14% of all similar sailboat designs. A comfort value significantly below average.

L/B (Length Beam Ratio)
What is L/B (Length Beam Ratio)?
The l/b ratio for Rival 22 is 4.53.

Wide Slim 100% 0 50 100
Compared with other similar sailboats it is slimmer than 100% of all other designs. It seems that the designer has chosen a significantly more speedy hull design. This type of design is also referred to as 'needle'.


Ballast Ratio
What is a Ballast Ratio?
The ballast ratio for Rival 22 is 42%.

Low High 66% 0 50 100
This ballast ratio shows a righting moment that is higher than 66% of all similar sailboat designs. A righting moment (ability to resist heeling) just above average.

D/L (Displacement Length Ratio)
What is Displacement Length Ratio?
The DL-ratio for Rival 22 is 138 which categorizes this boat among 'ultra light racers'.

Heavy Light 92% 0 50 100
92% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.

SA/D (Sail Area Displacement ratio)
What is SA/D (Sail Area Displacement ratio)?
The SA/D for Rival 22 with ISO 8666 reference sail is 13.7, with a 135% genua the SA/D is 15.8.

Low High 15% 0 50 100
The SA/D ratio indicates that it is faster than 15% of all similar sailboat designs in light wind.

RSP (Relative Speed Performance)
What is Relative Speed Performance?
The Relative Speed Performance for Rival 22 is 12

Slow Fast 12% 0 50 100
The relative speed performance is 12 which means that a it is faster than 12% of all similar sailboat designs.

Maintenance

Bottom Paint
When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 24m2 (258 ft2).
Based on this, your favourite maritime shop can tell you the quantity you need.
Note: If you use a paint roller you will need more paint than if you use a paintbrush.

Rig
Dimensions of sail for fractional rig.
mainsail specifications genoa specifications spinnaker specifications
Are your sails worn out? You might find your next sail here: Sails for Sale


If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

Guiding dimensions of running rig
UsageLengthDiameter
Mainsail halyard 26.3 m(86.3 feet)12 mm(1/2 inch)
Jib/genoa halyard26.3 m(86.3 feet)12 mm(1/2 inch)
Spinnaker halyard26.3 m(86.3 feet)12 mm(1/2 inch)
Jib sheet 11.0 m(36.3 feet)14 mm(0.55 inch)
Genoa sheet11.0 m(36.3 feet)14 mm(0.55 inch)
Mainsheet 27.6 m(90.6 feet)14 mm(0.55 inch)
Spinnaker sheet24.3 m(79.8 feet)14 mm(0.55 inch)
Cunningham3.0 m(9.8 feet)12 mm(1/2 inch)
Kickingstrap6.0 m(19.7 feet)12 mm(1/2 inch)
Clew-outhaul6.0 m(19.7 feet)12 mm(1/2 inch)


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References