Non Spin/HSFClub Certificate2025
ButterflyNOR 8100
Norges Seilforbund
Sognsveien 73
0854 OSLO
Rated boat velocities in knots
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat Angles43.0°43.0°40.8°39.5°39.3°38.9°38.8°38.9°39.7°
Beat VMG2.273.123.764.164.344.424.474.514.45
52°3.554.735.545.986.196.276.326.376.37
60°3.774.975.746.156.356.446.496.556.57
75°3.865.105.876.286.516.666.746.846.89
90°3.734.985.816.276.546.756.927.117.23
110°3.234.465.436.096.486.767.027.467.75
120°3.034.225.205.936.376.686.957.488.00
135°2.603.724.715.506.086.456.737.277.86
150°2.153.174.144.945.636.136.477.007.53
Run VMG1.862.753.594.355.035.636.106.707.19
Gybe Angles148.0°148.0°153.4°162.7°170.3°175.4°178.6°179.5°179.5°
APH ToD:659.5CDL: 7.012APH ToT: 0.9098CertNo:5624
BOAT
ClassMAMBA 29DesignerJanBeckerBuilderAge dateSeries date01/1981Offset filemamba29sc.offData file5624
HULL
Length Overall8.700 mMaximum Beam2.626 mDraft1.572 mDisplacement3,168 kgDLR8.2252IMS DivisionCruiser/RacerDynamic Allowance0.280%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.340m
CREW
Maximum weight437 kg(default)Minimum weight307 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail21.3621.61Headsail Luffed26.3126.31Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS (m²)
Trysail6.21Storm Jib6.27Heavy Weather Jib16.91
SAIL LIMITS
Headsails5
✱ Zero set flying
Spinnakers0
✱ Spinnaker pole aboard
STABILITY
Righting MomentN/AStability IndexN/A
The owner and any other person in charge is responsible that boat is complying with her certificate in accordance with RRS 78.1 and ORC Rule 304.
Non Spin/HSFClub Certificate2025
ButterflyNOR 8100
Norges Seilforbund
Sognsveien 73
0854 OSLO
Time Allowances in secs/NM
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1584.81154.6957.4866.3830.2813.8805.1799.0809.3
52°1015.5760.4650.3602.1581.9574.2569.9565.2565.4
60°955.4723.9627.5585.8567.0559.1554.8549.3548.2
75°931.5706.2612.8573.4552.7540.4534.1526.0522.2
90°964.8723.1619.5574.5550.5533.4520.5506.7498.2
110°1114.9807.2663.3590.9555.6532.3512.9482.8464.5
120°1188.6852.4692.2607.3565.0539.0517.7481.4449.9
135°1384.7967.7765.0654.8592.5558.6535.0495.2458.2
150°1674.11134.3870.5728.3640.0587.4556.6514.5478.3
Run VMG1933.21309.71002.2828.2715.9639.1590.0537.6500.4
Selected Courses
Windward / Leeward1755.51232.2979.8847.3773.1726.5697.5668.3654.9
All purpose1315.1943.9769.2681.2634.5607.1589.6567.5554.2
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward809.40.7413
All purpose659.50.9098
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6745
Downwind "popa"0.7470
70% up, 30% down "Ilhabela"0.6948
30% up, 70% down "Ilhabela-inverso"0.7237
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Predominantly Upwind700.90.8560
Predominantly Downwind684.10.8771
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low856.60.7005
Triple Number AP Medium654.50.9167
Triple Number AP High585.71.0245
Triple Number Windward/Leeward Low1158.00.5181
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Single Number Predominant Upwind728.60.8235
Single Number Predominant Reaching659.70.9096
Single Number Predominant Downwind719.60.8338
Predominant Upwind - Low996.10.6024
Predominant Upwind - Low/Med764.00.7854
Predominant Upwind - Medium678.30.8845
Predominant Upwind - Med/High638.10.9404
Predominant Upwind - High622.90.9632
Predominant Downwind Low1089.90.5505
Predominant Downwind Low/Med786.90.7625
Predominant Downwind Medium656.90.9134
Predominant Downwind Med/High580.51.0336
Predominant Downwind High544.01.1030
Predominant Reaching Low925.40.6484
Predominant Reaching Low/Med701.30.8555
Predominant Reaching Medium612.90.9790
Predominant Reaching Med/High564.51.0630
Predominant Reaching High540.91.1092
SA/DSPL Upwind22.02SA/DSPL Downwind22.02
Scoring OptionTODTOT
5-Band Windward/Leeward Low1300.80.4613
5-Band Windward/Leeward Low/Med939.70.6385
5-Band Windward/Leeward Medium788.50.7610
5-Band Windward/Leeward Med/High703.90.8525
5-Band Windward/Leeward High671.00.8941
Windward/Leeward 60-40 Low1283.20.4676
Windward/Leeward 60-40 Low/Med938.90.6391
Windward/Leeward 60-40 Medium799.20.7508
Windward/Leeward 60-40 Med/High724.60.8280
Windward/Leeward 60-40 High697.20.8606
5-Band AP Low962.20.6236
5-Band AP Low/Med744.00.8064
5-Band AP Medium645.10.9300
5-Band AP Med/High592.61.0125
5-Band AP High569.01.0544
5-Band SF Bay Tour - Low1110.90.5401
5-Band SF Bay Tour - Low/Med896.50.6693
5-Band SF Bay Tour - Medium762.20.7872
5-Band SF Bay Tour - Med/High690.60.8688
5-Band SF Bay Tour - High662.00.9064
Chicago-Mac Upwind0.7997
Chicago-Mac All Purpose0.8049
Chicago-Mac Downwind0.8014
Bayview-Mac Cove Island0.5816
Bayview-Mac Shore0.5884
Harvest Moon Regatta574.91.0436
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance718.8
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating718.80.8348
FinRating, kevyt tuuli1282.50.7797
FinRating, kova tuuli573.10.8724
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8348
Triple Number Coastal/Long Distance Low0.7005
Triple Number Coastal/Long Distance Medium0.9168
Triple Number Coastal/Long Distance High1.0245
Triple Number Windward/Leeward Low0.5425
Triple Number Windward/Leeward Medium0.7468
Triple Number Windward/Leeward High0.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
For information
General Purpose Handicap (GPH)742.1
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low856.5
Triple Number Coastal/Long Distance Medium654.5
Triple Number Coastal/Long Distance High585.7
Triple Number Windward/Leeward Low1106.0
Triple Number Windward/Leeward Medium803.4
Triple Number Windward/Leeward High693.8
Predominantly Upwind700.9
Predominantly Downwind684.1
Predominantly Reaching648.6
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7005
Triple Number Coastal/Long Distance Medium0.9168
Triple Number Coastal/Long Distance High1.0245
Triple Number Windward/Leeward Low0.5425
Triple Number Windward/Leeward Medium0.7468
Triple Number Windward/Leeward High0.8648
Coastal/Long Distance0.8348
Predominantly Upwind0.8560
Predominantly Downwind0.8771
For information
General Purpose Handicap (GPH)742.1
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9098
Distanseseilas Trippeltall svak vind0.7005
Distanseseilas Trippeltall mellomvind0.9168
Distanseseilas Trippeltall sterk vind1.0245
Pølsebane Trippeltall svak vind0.5425
Pølsebane Trippeltall mellomvind0.7468
Pølsebane Trippeltall sterk vind0.8648
Motvind Singeltall0.8560
Medvind Singeltall0.8771
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Coastal/Long Distance718.80.8348
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind700.90.8560
Predominantly Downwind684.10.8771
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore658.90.9106
Cape Doctor Coastal558.21.0749
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7005
Triple Number Coastal/Long Distance Medium0.9168
Triple Number Coastal/Long Distance High1.0245
Triple Number Windward/Leeward Low0.5425
Triple Number Windward/Leeward Medium0.7468
Triple Number Windward/Leeward High0.8648
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7005
Triple Number Coastal/Long Distance Medium0.9168
Triple Number Coastal/Long Distance High1.0245
Triple Number Windward/Leeward Low0.5425
Triple Number Windward/Leeward Medium0.7468
Triple Number Windward/Leeward High0.8648
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Predominantly Upwind700.90.8560
Predominantly Downwind684.10.8771
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance718.80.8348
Triple Number Coastal/Long Distance Low856.50.7005
Triple Number Coastal/Long Distance Medium654.50.9168
Triple Number Coastal/Long Distance High585.71.0245
Triple Number Windward/Leeward Low1106.00.5425
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1894.91239.9924.3766.2677.3630.3596.1544.1528.0
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low856.60.7005
Triple Number AP Medium654.50.9167
Triple Number AP High585.71.0245
Triple Number Windward/Leeward Low1158.00.5181
Triple Number Windward/Leeward Medium803.40.7468
Triple Number Windward/Leeward High693.80.8648
Single Number Predominant Upwind728.60.8235
Single Number Predominant Reaching659.70.9096
Single Number Predominant Downwind719.60.8338
Predominant Upwind - Low996.10.6024
Predominant Upwind - Low/Med764.00.7854
Predominant Upwind - Medium678.30.8845
Predominant Upwind - Med/High638.10.9404
Predominant Upwind - High622.90.9632
Predominant Downwind Low1089.90.5505
Predominant Downwind Low/Med786.90.7625
Predominant Downwind Medium656.90.9134
Predominant Downwind Med/High580.51.0336
Predominant Downwind High544.01.1030
Predominant Reaching Low925.40.6484
Predominant Reaching Low/Med701.30.8555
Predominant Reaching Medium612.90.9790
Predominant Reaching Med/High564.51.0630
Predominant Reaching High540.91.1092
SA/DSPL Upwind22.02SA/DSPL Downwind22.02
Scoring OptionTODTOT
5-Band Windward/Leeward Low1300.80.4613
5-Band Windward/Leeward Low/Med939.70.6385
5-Band Windward/Leeward Medium788.50.7610
5-Band Windward/Leeward Med/High703.90.8525
5-Band Windward/Leeward High671.00.8941
Windward/Leeward 60-40 Low1283.20.4676
Windward/Leeward 60-40 Low/Med938.90.6391
Windward/Leeward 60-40 Medium799.20.7508
Windward/Leeward 60-40 Med/High724.60.8280
Windward/Leeward 60-40 High697.20.8606
5-Band AP Low962.20.6236
5-Band AP Low/Med744.00.8064
5-Band AP Medium645.10.9300
5-Band AP Med/High592.61.0125
5-Band AP High569.01.0544
5-Band SF Bay Tour - Low1110.90.5401
5-Band SF Bay Tour - Low/Med896.50.6693
5-Band SF Bay Tour - Medium762.20.7872
5-Band SF Bay Tour - Med/High690.60.8688
5-Band SF Bay Tour - High662.00.9064
Chicago-Mac Upwind0.7997
Chicago-Mac All Purpose0.8049
Chicago-Mac Downwind0.8014
Bayview-Mac Cove Island0.5816
Bayview-Mac Shore0.5884
Harvest Moon Regatta574.91.0436
Non Spin/HSFClub Certificate2025
ButterflyNOR 8100
Norges Seilforbund
Sognsveien 73
0854 OSLO
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassMAMBA 29MeasurementHINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
LOA8.700Max. Beam2.626Draft1.572Displacement3,168Wetted area16.55IMS L7.555LSM07.275Acc. length8.534Sink (kg/mm) 11.38
VCGD-0.050VCGM-0.042RM Rated (kg·m) 44.6Limit of positive stability(°) N/AStability IndexN/ADefault crew weight437Declared crew weightN/A
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.340PBWPIPA0.0070
EDL0.400ST10.048ST20.170
ST30.170ST40.170ST51.600
RIG
Forestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footNoRunning backstays0CheckstaysSpreaders1Rotating mastNo
P11.810IG11.190ISP11.190MDT10.110MDL10.140MDT20.000MDL20.000TL0.000MW0.000GO0.000
E3.000J3.300BAS1.358FSD0.000SFJ0.000SPL3.380WPLTPS0.000BD0.000MWT0.00MCG0.000
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered-0.050Flotation Date01/01/2015
BALLAST
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
Non Spin/HSFClub Certificate2025
ButterflyNOR 8100
Norges Seilforbund
Sognsveien 73
0854 OSLO
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment426-2009051120030.150.001.151.952.5121.3611/05/2009
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment426-2009051120080.000.000.000.000.004.8410.68NoNo 26.3111/05/2009
CRUISER/RACER REQUIREMENTS*
Accommodation length8.5 mTable area0.33 m²Headroom1.40 mMinimum number of berths3Personal gear stowage0.12 m³Fresh water capacity38 lMinimum number of seats in cockpit3Food stowage0.18 m³Fuel capacity20 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.