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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 Angles | 45.0° | 45.0° | 43.0° | 41.5° | 40.4° | 39.8° | 39.5° | 39.7° | 40.6° |
| Beat VMG | 2.28 | 3.20 | 3.96 | 4.53 | 4.94 | 5.15 | 5.24 | 5.29 | 5.21 |
| 52° | 3.63 | 4.98 | 6.00 | 6.73 | 7.20 | 7.44 | 7.54 | 7.62 | 7.61 |
| 60° | 3.91 | 5.29 | 6.31 | 7.00 | 7.42 | 7.66 | 7.78 | 7.88 | 7.90 |
| 75° | 4.06 | 5.50 | 6.53 | 7.20 | 7.60 | 7.87 | 8.07 | 8.29 | 8.38 |
| 90° | 3.95 | 5.46 | 6.63 | 7.40 | 7.83 | 8.09 | 8.24 | 8.61 | 8.87 |
| 110° | 3.94 | 5.50 | 6.74 | 7.52 | 7.98 | 8.36 | 8.70 | 9.23 | 9.58 |
| 120° | 3.80 | 5.31 | 6.53 | 7.37 | 7.88 | 8.28 | 8.67 | 9.44 | 10.18 |
| 135° | 3.34 | 4.73 | 5.94 | 6.93 | 7.58 | 8.03 | 8.44 | 9.26 | 10.26 |
| 150° | 2.73 | 3.98 | 5.15 | 6.18 | 7.03 | 7.61 | 8.02 | 8.79 | 9.65 |
| Run VMG | 2.36 | 3.45 | 4.46 | 5.35 | 6.15 | 6.81 | 7.34 | 8.12 | 8.82 |
| Gybe Angles | 145.6° | 145.6° | 149.4° | 151.2° | 155.9° | 162.6° | 168.7° | 176.8° | 176.3° |
APH ToD:557.9CDL: 9.627APH ToT: 1.0754CertNo:6351.2
BOATClassDUFOUR 40DesignerFELCIBuilderDUFOURAge date01.2006Series date01.2003Offset fileDUFOUR40.offData fileRU6351 Preved
HULLLength Overall12.060 mMaximum Beam3.890 mDraft2.067 mDisplacement7 784 kgDLR6.6262IMS DivisionCruiser/RacerDynamic Allowance0.280%Age Allowance0.487%
PROPELLERInstallationStrutTypeSolid 2 bladesDiameter0.435m
CREWMaximum weight780 kg(declared)Minimum weight650 kg
✱ when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS
(m²)
MeasuredRatedMainsail42.3443.28Headsail Luffed37.2637.26Headsail FlyingSymmetric104.46104.46Asymmetric88.9788.97
(All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS
(m²)
Trysail12.51Storm Jib11.49Heavy Weather Jib31.01
SAIL LIMITSHeadsails5✱ One set on the forestay
Spinnakers4✱ Asymmetric may be tacked on the pole
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)ClassDUFOUR 40Measurement18.05.2025HINPlan reviewHull constructionSolidCarbon rudderNoLight stanchionsNoTrim tabNo
LOA12.060Max. Beam3.890Draft2.067Displacement7 784Wetted area30.38IMS L10.844LSM010.550Acc. length12.060Sink (kg/mm)
23.18
VCGD0.099VCGM0.100RM Rated
(kg·m)
181.1Limit of positive stability(°)
N/AStability IndexN/ADefault crew weight743Declared crew weight780
PROPELLERPropeller TypeSolid 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.435PBWPIPA0.0192
EDLST1ST2
ST3ST4ST5
RIGForestay tensionAftInner stayNone FittedMast materialAluminumSingle headsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoAdjustable mast footRunning backstays0CheckstaysSpreaders2Rotating mastNo
P13.900IG15.083ISP15.183MDT10.122MDL10.225MDT20.122MDL20.225TL0.000MW0.225GO0.245
E5.140J4.190BAS1.893FSD0.029SFJ0.200SPL4.190WPLTPSBD0.160MWT244.50MCG5.510
Flying Headsail Foretriangles
IdISPTPS
FLOTATION AND STABILITYCalculation methodRM entered directlyRM entered180.0Flotation Date13.05.2025
SFFP0.100FFM1.382FF1.392LCFcl6.539SG1.0000
SAFP11.430FAM1.181FA1.188LCFsh6.806HBI1.242
INVENTORYFixed Ballast Total0
Total deductible
Total deductible
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MAINSAILIdMHBMUWMTWMHWMQWAreaMeas.DateComment10.141.021.923.334.3042.34
MIZZENIdMHBMUWMTWMHWMQWAreaMeas.DateComment
HEADSAILIdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment10.040.601.202.554.045.5214.05NoNo 37.26
SYMMETRIC SPINNAKERIdSLUSLESLSHWSFLAreaMeas.DateComment115.4315.4315.438.227.74104.46
ASYMMETRIC SPINNAKERIdSLUSLESLSHWSFLRatioAreaMeas.DateComment115.1013.1014.107.468.0293%88.97
MIZZEN STAYSAILIdYSHFYSHWYSFLAreaMeas.DateComment
QUADRILATERALIdQLEQHLQFLQCDQLMMastAreaMeas.DateComment
CRUISER/RACER REQUIREMENTS*Accommodation length12.1 mTable area0.55 m²Headroom1.81 mMinimum number of berths5Personal gear stowage0.20 m³Fresh water capacity152 lMinimum number of seats in cockpit5Food stowage0.30 m³Fuel capacity92 lCabin soleStovesSinksGalley gear stowageToiletWash basinNavigation areaHanging locker
*This list is a summary of the requirements. See IMS Appendix 1 for details.