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Rated boat velocities in knots| Wind Velocity | 6 kt
| 8 kt
| 10 kt
| 12 kt
| 14 kt
| 16 kt
| 20 kt
| 24 kt
|
| Beat Angles | 44.1° | 41.7° | 40.7° | 40.3° | 40.3° | 40.2° | 40.5° | 41.7° |
| Beat VMG | 2.82 | 3.44 | 3.87 | 4.15 | 4.30 | 4.37 | 4.37 | 4.27 |
| 52° | 4.33 | 5.13 | 5.69 | 6.04 | 6.22 | 6.30 | 6.33 | 6.30 |
| 60° | 4.56 | 5.36 | 5.90 | 6.22 | 6.39 | 6.49 | 6.55 | 6.54 |
| 75° | 4.70 | 5.53 | 6.08 | 6.39 | 6.58 | 6.72 | 6.87 | 6.91 |
| 90° | 4.61 | 5.47 | 6.07 | 6.41 | 6.64 | 6.82 | 7.09 | 7.24 |
| 110° | 4.14 | 5.10 | 5.85 | 6.33 | 6.63 | 6.87 | 7.27 | 7.60 |
| 120° | 3.92 | 4.90 | 5.67 | 6.21 | 6.55 | 6.80 | 7.26 | 7.67 |
| 135° | 3.47 | 4.45 | 5.23 | 5.88 | 6.32 | 6.61 | 7.07 | 7.49 |
| 150° | 2.95 | 3.76 | 4.53 | 5.17 | 5.73 | 6.16 | 6.72 | 7.16 |
| Run VMG | 2.56 | 3.36 | 4.13 | 4.81 | 5.41 | 5.93 | 6.58 | 7.04 |
| Gybe Angles | 143.3° | 171.7° | 173.0° | 174.4° | 175.3° | 176.6° | 178.3° | 178.6° |
APH ToD:689.9CDL: 6.948APH ToT: 0.8697CertNo:
BOATClassMamba 31DesignerBengt KarlssonBuilderBK Marin ABAge date01.1981Series date01.1979Offset fileMamba31cor.offData fileUFO_AH0649RUS78_Mamba
HULLLength Overall9.250 mMaximum Beam3.082 mDraft1.678 mDisplacement4 350 kgDLR8.3689IMS DivisionCruiser/RacerDynamic Allowance0.540%Age Allowance0.487%
PROPELLERInstallationShaft exposedTypeFeathering 2 bladesDiameter0.428m
CREWMaximum weight300 kg(declared)Minimum weight170 kg
* when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS
(m²)
MeasuredRatedMainsail19.4719.79Headsail Luffed23.0423.04Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS
(m²)
Trysail5.55Storm Jib7.03Heavy Weather Jib18.97
SAIL LIMITSHeadsails1
Spinnakers0
* No spinnaker pole aboard
STABILITYRighting 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.
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Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)ClassMamba 31Measurement25.04.2023HINPlan reviewHull constructionSolidCarbon RudderNoLight stanchionsNoTrim tabNo
LOA9.250Max. Beam3.082Draft1.678Displacement4 350Wetted area19.41IMS L7.964LSM08.040Acc. length9.250Sink (kg/mm)
14.14
VCGD0.196VCGM0.132RM Rated
(kg·m)
60.0Limit of positive stability(°)
N/AStability IndexN/ADefault crew weight504Declared crew weight300
PROPELLERPropeller TypeFeathering 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.428PBW0.136PIPA0.0036
PSD0.025PHD0.065PHL0.094
PSA12.0°ESL0.880
ST10.025ST20.097ST30.100
ST40.048ST50.165
RIGForestay tensionAftInner stayFixedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footRunners/Checkstays0Spreaders1Rotating mastNo
P10.390IG11.750ISP11.770MDT10.115MDL10.180MDT2MDL2TLNo TaperMW0.180GO0.210
E3.050J3.500BAS1.300FSD0.031SFJ0.300SPLWPLTPS4.465BD0.105MWT72.38MCG4.838
Flying Headsail Foretriangles
IdISPTPS
FLOTATION AND STABILITYCalculation methodPoles incliningFlotation Date25.04.2023Comment
W132.5W232.5W332.5W432.5
PD1106.0PD2110.0PD3105.0PD4107.0
WD10.150PLM2250.00GSA50.0RSA50.0RM60.7
INVENTORYIdDescriptionWeight SailingLCGVCGGAIdDescriptionWeight SailingLCGVCGGA0045.220.50
0011.50
0029.231.10
INVENTORYFixed Ballast Total0
Total deductible
OTHER ITEMSIdKindDescriptionWeightLCGVCG002Anchor169.231.10001Chain241.50004Tools405.220.50Total deductible804.910.47
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MAINSAILIdMHBMUWMTWMHWMQWAreaMeas.DateCommentM-New0.120.651.172.122.6219.4711.05.2024
MIZZENIdMHBMUWMTWMHWMQWAreaMeas.DateComment
HEADSAILIdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentH-New0.060.480.931.973.124.2711.22NoNo 23.0415.05.2024
SYMMETRIC SPINNAKERIdSLUSLESLSHWSFLAreaMeas.DateComment
ASYMMETRIC SPINNAKERIdSLUSLESLSHWSFLRatioAreaMeas.DateComment
MIZZEN STAYSAILIdYSHFYSHWYSFLAreaMeas.DateComment
QUADRILATERALIdQLEQHLQFLQCDQLMMastAreaMeas.DateComment
CRUISER/RACER REQUIREMENTS*Accommodation length9.2 mTable area0.44 m²Headroom1.64 mMinimum number of berths4Personal gear stowage0.16 m³Fresh water capacity64 lMinimum number of seats in cockpit4Food stowage0.24 m³Fuel capacity34 l
*This list refers to the calculated requirements. See IMS Appendix 1 for the complete list of requirements.