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Class
Rules:
Performance Parameters
Multihull & Monohull
Standards
to insure competition between boats of identical design in the essential
areas such as hull lines, weights, and sail plan are applied to
Ratings.
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Sail
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Main
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Jib
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Platform
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Sailing
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Crew
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Crew.Min
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Crew.Max
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Hiking
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Length
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Area
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Vertical.Luff
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Vertical.Luff
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Weight
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Weight
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Wt./#
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Weight
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Weight
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Trapeze
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America's
Cup (AC45, AC72)
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Link
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+
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+
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+
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+
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+
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+
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+
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+
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+
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+
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F18
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Link
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+
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+
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+
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+
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+
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+
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+
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+
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+
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+
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Texel
Netherlands ≤ 20 ft.
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Link
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+
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+
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+
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+
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+
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+
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+
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+
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Texel
Netherlands > 20 ft.
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Link
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+
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+
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+
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+
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+
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+
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+
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Texel
Australia
(OMR) > 22ft.
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Link
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+
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+
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+
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+
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+
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+
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+
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Texel
Thailand
(OMR) > 22ft.
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Link
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+
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+
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+
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+
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+
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+
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+
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Multi2000
(France)
> 22ft
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Link
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+
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+
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+
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+
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+
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+
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SCHRS
≤ 20 ft.
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Link
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+
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+
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+
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+
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+
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#
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+
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Antrim
27
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Link
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+
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+
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+
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+
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+
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2
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1100 lb
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J-120
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Link
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+
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+
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+
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+
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+
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600 kg
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Melges
24
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Link
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+
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+
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+
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+
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+
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3
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360 kg
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J-105
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Link
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+
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+
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+
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+
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+
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1045 lb
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Express
27
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Link
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+
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+
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+
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+
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+
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880 lb
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# Texel
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Crew
Weight Assumption x LOA or Declaration
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# SCHRS Crew
Number
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Crew
Weight Assumption = 75kg / 165 lb each
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Multihull
Rating Formulas:
General Form to assess Performance
100
/ (coeff. * RL ^ p * RSA ^ q / RW ^ r).
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RL
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= Rated
Length
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RSA
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= Rated
Sail Area
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RW
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= Rated
Weight
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TR.NDL
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=
Texel Rating (Netherlands)
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TR.AUS
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=
Texel Rating (Australia)
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Multi2000
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=
Multi2000 Rule (France)
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MOCRA
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=
Kelsall Shuttleworth Performance. (KSP, England)
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IOMR
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=
International Offshore Multihull Rule (California)
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TR.NDL.2009
(metr.)
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catamarans ≤ 20ft
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=
100 / (0.99 * RL ^ 0.3000 * RSA ^ 0.4000 / RW ^ 0.3000)
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TR.NDL.2009
(metr.)
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multihulls ≥ 20 ft
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=
100 / (0.99 * RL ^ 0.3000 * RSA ^ 0.4000 / RW ^ 0.3000)
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TR.NDL.2010
(metr.)
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Catamarans ≤ 20 ft
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=
100 / (1.15 * RL ^ 0.3000 * RSA ^ 0.4000 / RW ^ 0.3000)
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TR.NDL.2010
(metr.)
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multihulls ≥ 20 ft
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=
100 / (1.00 * RL ^ 0.3000 * RSA ^ 0.4000 / RW ^ 0.3250)
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TR.AUS.2010
(metr.)
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multihulls ≥ 22 ft
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=
100 / (1.00 * RL ^ 0.3000 * RSA ^ 0.4000 / RW ^ 0.3250)
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TR.THA.2010
(metr.)
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multihulls ≥ 22 ft
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=
100 / (1.00 * RL ^ 0.3000 * RSA ^ 0.4000 / RW ^ 0.3250)
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Multi2000
(FR)
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=
100 / (1.00 * RL ^ 0.3000 * RSA ^ 0.4000 / RW ^ 0.3250)
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MOCRA
(UK) (metr.)
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=
100 / (1.74 * RL ^ 0.2814 * RSA ^ 0.3546 / RW ^ 0.3124)
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Portsmouth
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ref 1 :Starts w/Pacific Multihull
Assoc. Calculated rating from measurements (modified)
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RL
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Rated
Length
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NDL
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Rated Length @ 2.0 % x LOA
above LWL
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AUS/THA
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Rated Length @ 1.5 % x LOA
above LWL
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FRA
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Rated Length @ 50% x FOC above
LWL (FOC = Fwd Overhang)
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MSA
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Measured
Sail Area
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RSA
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Rated
Sail Area
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2010.RSA.Scr.NDL
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=IF(msascr=0,0,IF(smgscr/sfscr>0.75,0.07*(msascr-rsag),(0.80-smgscr/sfscr)*(msascr-rsag)))
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2009.RSA.Scr.NDL
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=IF(msascr=0,0,IF(smgscr/sfscr>0.75,0.07*(msascr-rsag),(0.82-smgscr/sfscr)*(msascr-rsag)))
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2010.RSA.NDL
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=rsam+rsag+rsas+IF(rsas>0,0.16*msascr,rsascr)
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2009.RSA.NDL
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=rsam+rsag+rsas+rsascr
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2010.CatCorrect.NDL
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IF(tri=1,1,MAX(1,1/(0.19*rsa^0.4/rw^0.36+0.91)))
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2010.RSA.AUS
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No.Screacher
& no.Spin
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RSA=RSA.main+RSA.genoa
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Screacher
& no.Spin
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RSA=rsa.Main+(0.65*rsa.Genoa)+z.85*(0.35*MSA.Screacher)
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No.Screacher
& Spin
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RSA=rsa.Main+(0.70*rsa.Genoa)+z.85*(0.30*MSA.Spinnaker)
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Screacher
& Spin
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RSA=rsa.Main+(0.65*rsa.Genoa)
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+z.85*((0.30*MSA.Spinnaker)+(0.50*(MSA.Screacher))
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Ref:
Texel.NDL.Link
, ISAF SCHRS.Link, Texel.AUS.Link, Multi2000.English Link,
Portsmouth US Sailing Offshore.Link
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