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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
|
| Beat Angles | 44.1° | 42.0° | 40.6° | 40.0° | 39.6° | 39.4° | 39.6° |
| Beat VMG | 2.78 | 3.40 | 3.84 | 4.16 | 4.36 | 4.45 | 4.50 |
| 52° | 4.34 | 5.20 | 5.69 | 6.02 | 6.24 | 6.36 | 6.43 |
| 60° | 4.72 | 5.55 | 6.02 | 6.22 | 6.40 | 6.53 | 6.63 |
| 75° | 5.11 | 5.93 | 6.35 | 6.55 | 6.67 | 6.74 | 6.92 |
| 90° | 5.22 | 6.06 | 6.50 | 6.75 | 6.93 | 7.06 | 7.22 |
| 110° | 4.97 | 5.89 | 6.41 | 6.73 | 6.99 | 7.22 | 7.60 |
| 120° | 4.65 | 5.63 | 6.30 | 6.68 | 6.98 | 7.26 | 7.76 |
| 135° | 4.18 | 5.19 | 5.98 | 6.47 | 6.80 | 7.09 | 7.64 |
| 150° | 3.58 | 4.56 | 5.39 | 6.06 | 6.48 | 6.78 | 7.32 |
| Run VMG | 3.10 | 3.95 | 4.69 | 5.34 | 5.90 | 6.34 | 6.91 |
| Gybe Angles | 145.7° | 150.5° | 153.8° | 158.6° | 171.2° | 177.2° | 179.0° |
APH: 650.7
CDL: 6.975
GPH: 732.2
CertNo:
BOATClassMamba 31DesignerBengt KarlssonBuilderBK Marin ABAge date01.1981Series date01.1979Offset fileMamba31cor.offData fileUFO_AH0649RUS78_Mamba_t
HULLLength Overall9.250 mMaximum Beam3.082 mDraft1.680 mDisplacement4 384 kgDLR8.5263IMS DivisionCruiser/RacerDynamic Allowance0.550%Age Allowance0.487%
PROPELLERInstallationShaft exposedTypeFeathering 2 bladesDiameter0.428m
CREWMaximum weight400 kgMinimum weight300 kg
* when appliedNon Manual PowerCrew Arm Extension
SAIL AREAS
(m²)
MeasuredRatedMainsail17.5017.67Headsail Luffed22.9822.98Headsail Flying50.1050.10Symmetric58.8758.89Asymmetric
STORM SAIL AREAS
(m²)
Trysail5.42Storm Jib7.03Heavy Weather Jib18.97
SAIL LIMITSHeadsails5
Spinnakers4
STABILITYRighting Moment60.1 kg·mStability Index107.4
COMMENTSFFM=1,08 FAM=0,897
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. Beam3.082Draft1.680Displacement4 384Wetted area19.44IMS L7.981LSM08.011Acc. length9.250Sink (kg/mm)
14.13
VCGD0.193VCGM0.127RM Rated
(kg·m)
60.1Limit of positive stability(°)
105.5Stability Index107.4
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 stayFixedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders1Rotating mastNo
P10.390IG11.750ISP11.770MDT10.115MDL10.180MDT2MDL2TLMW0.180GO0.210
E2.980J3.500BAS1.300FSD0.031SFJ0.300SPL3.480WPLTPS4.330BD0.105MWT72.38MCG4.838
Flying Headsail Foretriangles
IdISPTPS111.7704.330
FLOTATION AND STABILITYCalculation methodPoles incliningFlotation Date25.04.2023MeasurerComment
SFFP0.551FFM0.877FF0.887LCFcl5.495SG1.0260
SAFP8.777FAM0.868FA0.870LCFsh5.701HBI0.832
W132.5W232.5W332.5W432.5
PD1106.0PD2110.0PD3105.0PD4107.0
WD10.150PLM2250.00GSA50.0RSA50.0RM60.7
INVENTORYFixed Ballast Total0
Total deductible
OTHER ITEMSIdKindDescriptionWeightLCGVCG002Anchor169.231.10001Chain241.50004Tools405.220.50Total deductible804.910.47
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MAINSAILIdMHBMUWMTWMHWMQWAreaMeas.DateCommentM-10.130.581.021.772.3917.5003.08.2022
MIZZENIdMHBMUWMTWMHWMQWAreaMeas.DateComment
HEADSAILIdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment10.031.232.504.906.407.2011.72NoYes050.1003.08.2022H-20.060.480.931.943.084.3011.25NoNo 22.9803.08.2022
SYMMETRIC SPINNAKERIdSLUSLESLSHWSFLAreaMeas.DateCommentS-111.5411.5311.546.096.2658.8714.05.2023
ASYMMETRIC SPINNAKERIdSLUSLESLSHWSFLRatioAreaMeas.DateComment
MIZZEN STAYSAILIdYSHFYSHWYSFLAreaMeas.DateComment
QUADRILATERALIdQLEQHLQFLQCDQLMMastAreaMeas.DateComment