Double HandedClub 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 Angles42.3°42.3°40.6°40.7°40.6°40.8°40.8°41.2°43.0°
Beat VMG2.343.143.693.984.104.154.184.174.03
52°3.574.725.455.845.996.066.106.126.06
60°3.764.945.676.046.206.276.316.356.33
75°3.895.095.836.216.416.526.596.676.70
90°3.795.005.796.236.496.676.796.957.06
110°3.694.985.896.376.666.846.987.117.25
120°3.524.815.776.336.676.967.207.507.63
135°3.104.335.336.076.506.847.177.848.65
150°2.563.694.725.566.176.566.897.558.40
Run VMG2.223.204.094.855.516.036.427.037.66
Gybe Angles146.9°146.9°151.4°155.2°162.8°169.3°177.2°178.1°176.8°
APH ToD:649.9CDL: 6.617APH ToT: 0.9232CertNo: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 Allowance0.260%Age Allowance0.487%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.340m
CREW
Maximum weight170 kg(default)Minimum weight120 kg ✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail21.3621.61Headsail Luffed26.3126.31Headsail FlyingSymmetric54.6454.64Asymmetric
STORM SAIL AREAS (m²)
Trysail6.21Storm Jib6.27Heavy Weather Jib16.91
SAIL LIMITS
Headsails5Spinnakers4
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.
Double HandedClub 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 VMG1541.31146.9975.3904.7878.4867.0861.0862.4893.5
52°1009.2763.4660.3616.6601.1594.1590.4587.9594.1
60°958.3729.3635.4596.2580.8574.2570.4566.9568.9
75°926.1707.0618.0579.7561.5552.1546.6539.5537.4
90°950.9719.4622.1578.2554.9540.0530.3517.6509.9
110°975.9722.3611.3564.9540.2526.1515.9506.0496.6
120°1022.7747.8623.8568.7539.4517.2500.1480.0472.0
135°1161.9832.2675.1593.2553.4526.0502.1459.5416.2
150°1405.5974.4763.3647.0583.4548.8522.7476.9428.8
Run VMG1625.01125.2880.3741.9652.9597.2560.9511.9470.1
Selected Courses
Windward / Leeward1580.11136.0927.8823.3765.6732.1710.9687.2681.8
All purpose1202.5881.0734.8665.0629.7609.6596.0578.5570.6
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward795.80.7540
All purpose649.90.9232
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.6466
Downwind "popa"0.8284
70% up, 30% down "Ilhabela"0.6921
30% up, 70% down "Ilhabela-inverso"0.7639
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Predominantly Upwind707.60.8479
Predominantly Downwind648.10.9258
Custom scoring options for Canada
Scoring OptionTODTOT
Triple Number AP Low807.90.7427
Triple Number AP Medium645.30.9298
Triple Number AP High592.91.0120
Triple Number Windward/Leeward Low1076.60.5573
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Single Number Predominant Upwind733.20.8183
Single Number Predominant Reaching642.80.9334
Single Number Predominant Downwind676.70.8866
Predominant Upwind - Low960.90.6244
Predominant Upwind - Low/Med759.10.7904
Predominant Upwind - Medium689.40.8703
Predominant Upwind - Med/High658.00.9119
Predominant Upwind - High647.40.9268
Predominant Downwind Low975.10.6153
Predominant Downwind Low/Med728.60.8235
Predominant Downwind Medium626.80.9573
Predominant Downwind Med/High566.31.0595
Predominant Downwind High532.41.1270
Predominant Reaching Low866.40.6925
Predominant Reaching Low/Med675.50.8883
Predominant Reaching Medium603.60.9940
Predominant Reaching Med/High563.91.0640
Predominant Reaching High542.21.1066
SA/DSPL Upwind22.02SA/DSPL Downwind35.10
Scoring OptionTODTOT
5-Band Windward/Leeward Low1195.80.5018
5-Band Windward/Leeward Low/Med897.70.6684
5-Band Windward/Leeward Medium778.50.7707
5-Band Windward/Leeward Med/High715.10.8391
5-Band Windward/Leeward High690.40.8691
Windward/Leeward 60-40 Low1197.10.5012
Windward/Leeward 60-40 Low/Med910.40.6590
Windward/Leeward 60-40 Medium800.30.7497
Windward/Leeward 60-40 Med/High744.80.8056
Windward/Leeward 60-40 High725.80.8267
5-Band AP Low889.50.6746
5-Band AP Low/Med716.20.8377
5-Band AP Medium638.10.9402
5-Band AP Med/High598.21.0030
5-Band AP High580.21.0341
5-Band SF Bay Tour - Low1035.20.5796
5-Band SF Bay Tour - Low/Med861.30.6967
5-Band SF Bay Tour - Medium756.50.7932
5-Band SF Bay Tour - Med/High702.70.8539
5-Band SF Bay Tour - High681.00.8811
Chicago-Mac Upwind0.7977
Chicago-Mac All Purpose0.8292
Chicago-Mac Downwind0.8569
Bayview-Mac Cove Island0.6203
Bayview-Mac Shore0.6251
Harvest Moon Regatta563.31.0651
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance704.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating704.90.8511
FinRating, kevyt tuuli1175.20.8509
FinRating, kova tuuli583.90.8563
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Custom scoring options for Germany
Scoring OptionTime On
Time
Coastal/Long Distance0.8511
Triple Number Coastal/Long Distance Low0.7427
Triple Number Coastal/Long Distance Medium0.9299
Triple Number Coastal/Long Distance High1.0120
Triple Number Windward/Leeward Low0.5814
Triple Number Windward/Leeward Medium0.7595
Triple Number Windward/Leeward High0.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
For information
General Purpose Handicap (GPH)723.2
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low807.9
Triple Number Coastal/Long Distance Medium645.2
Triple Number Coastal/Long Distance High592.9
Triple Number Windward/Leeward Low1032.0
Triple Number Windward/Leeward Medium790.0
Triple Number Windward/Leeward High707.3
Predominantly Upwind707.6
Predominantly Downwind648.1
Predominantly Reaching626.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7427
Triple Number Coastal/Long Distance Medium0.9299
Triple Number Coastal/Long Distance High1.0120
Triple Number Windward/Leeward Low0.5814
Triple Number Windward/Leeward Medium0.7595
Triple Number Windward/Leeward High0.8483
Coastal/Long Distance0.8511
Predominantly Upwind0.8479
Predominantly Downwind0.9258
For information
General Purpose Handicap (GPH)723.2
Custom scoring options for Norway
Scoring OptionTime On
Time
Distanseseilas Singeltall  (APH)0.9232
Distanseseilas Trippeltall svak vind0.7427
Distanseseilas Trippeltall mellomvind0.9299
Distanseseilas Trippeltall sterk vind1.0120
Pølsebane Trippeltall svak vind0.5814
Pølsebane Trippeltall mellomvind0.7595
Pølsebane Trippeltall sterk vind0.8483
Motvind Singeltall0.8479
Medvind Singeltall0.9258
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Coastal/Long Distance704.90.8511
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind707.60.8479
Predominantly Downwind648.10.9258
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore683.40.8780
Cape Doctor Coastal573.01.0471
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7427
Triple Number Coastal/Long Distance Medium0.9299
Triple Number Coastal/Long Distance High1.0120
Triple Number Windward/Leeward Low0.5814
Triple Number Windward/Leeward Medium0.7595
Triple Number Windward/Leeward High0.8483
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7427
Triple Number Coastal/Long Distance Medium0.9299
Triple Number Coastal/Long Distance High1.0120
Triple Number Windward/Leeward Low0.5814
Triple Number Windward/Leeward Medium0.7595
Triple Number Windward/Leeward High0.8483
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Predominantly Upwind707.60.8479
Predominantly Downwind648.10.9258
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance704.90.8511
Triple Number Coastal/Long Distance Low807.90.7427
Triple Number Coastal/Long Distance Medium645.20.9299
Triple Number Coastal/Long Distance High592.91.0120
Triple Number Windward/Leeward Low1032.00.5814
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1675.31134.9874.5745.2672.5632.2600.3550.4541.5
Custom scoring options for United States of America
Scoring OptionTODTOT
Triple Number AP Low807.90.7427
Triple Number AP Medium645.30.9298
Triple Number AP High592.91.0120
Triple Number Windward/Leeward Low1076.60.5573
Triple Number Windward/Leeward Medium790.00.7595
Triple Number Windward/Leeward High707.30.8483
Single Number Predominant Upwind733.20.8183
Single Number Predominant Reaching642.80.9334
Single Number Predominant Downwind676.70.8866
Predominant Upwind - Low960.90.6244
Predominant Upwind - Low/Med759.10.7904
Predominant Upwind - Medium689.40.8703
Predominant Upwind - Med/High658.00.9119
Predominant Upwind - High647.40.9268
Predominant Downwind Low975.10.6153
Predominant Downwind Low/Med728.60.8235
Predominant Downwind Medium626.80.9573
Predominant Downwind Med/High566.31.0595
Predominant Downwind High532.41.1270
Predominant Reaching Low866.40.6925
Predominant Reaching Low/Med675.50.8883
Predominant Reaching Medium603.60.9940
Predominant Reaching Med/High563.91.0640
Predominant Reaching High542.21.1066
SA/DSPL Upwind22.02SA/DSPL Downwind35.10
Scoring OptionTODTOT
5-Band Windward/Leeward Low1195.80.5018
5-Band Windward/Leeward Low/Med897.70.6684
5-Band Windward/Leeward Medium778.50.7707
5-Band Windward/Leeward Med/High715.10.8391
5-Band Windward/Leeward High690.40.8691
Windward/Leeward 60-40 Low1197.10.5012
Windward/Leeward 60-40 Low/Med910.40.6590
Windward/Leeward 60-40 Medium800.30.7497
Windward/Leeward 60-40 Med/High744.80.8056
Windward/Leeward 60-40 High725.80.8267
5-Band AP Low889.50.6746
5-Band AP Low/Med716.20.8377
5-Band AP Medium638.10.9402
5-Band AP Med/High598.21.0030
5-Band AP High580.21.0341
5-Band SF Bay Tour - Low1035.20.5796
5-Band SF Bay Tour - Low/Med861.30.6967
5-Band SF Bay Tour - Medium756.50.7932
5-Band SF Bay Tour - Med/High702.70.8539
5-Band SF Bay Tour - High681.00.8811
Chicago-Mac Upwind0.7977
Chicago-Mac All Purpose0.8292
Chicago-Mac Downwind0.8569
Bayview-Mac Cove Island0.6203
Bayview-Mac Shore0.6251
Harvest Moon Regatta563.31.0651
Double HandedClub 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 L7.454LSM07.275Acc. length8.534Sink (kg/mm) 11.38
VCGD-0.050VCGM-0.042RM Rated (kg·m) 44.6Limit of positive stability(°) N/AStability IndexN/ADefault crew weight170Declared 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
Double HandedClub 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
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateComment426-20090511200911.0311.0311.035.910.0054.6411/05/2009
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.