Club
Certificate
2023

Boat

ENCORE

USA 7288

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles42.0°40.2°39.0°38.2°37.6°37.2°37.0°
Beat VMG3.664.384.845.075.205.285.35
52°5.506.416.917.157.267.337.40
60°5.756.617.087.327.437.507.58
75°5.906.747.207.467.637.747.88
90°5.776.677.197.507.737.908.15
110°5.656.767.377.727.988.178.46
120°5.496.647.317.728.058.338.81
135°4.916.126.997.507.878.228.88
150°4.175.276.246.907.297.588.08
Run VMG3.624.575.405.986.316.757.51
Gybe Angles144.8°147.4°146.9°148.5°149.6°172.1°176.3°

APH: 556.2

CDL: 9.453

GPH: 621.0

CertNo: US7500

BOAT
ClassIrwin 41 CitationDesignerTed IrwinBuilderIrwin YachtsAge date01/1983Series date01/1982Offset fileUS17348.OFFData fileUSA7288
HULL
Length Overall12.445 mMaximum Beam4.017 mDraft2.403 mDisplacement8,645 kgDLR8.9944IMS DivisionPerformanceDynamic Allowance0.220%Age Allowance0.487%
PROPELLER
InstallationShaft exposedTypeFeathering 2 bladesDiameter0.534m
CREW
Maximum weight658 kgMinimum weight494 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail38.0538.49Headsail Luffed61.9161.91Headsail FlyingSymmetricAsymmetric136.29136.29 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail11.97Storm Jib13.54Heavy Weather Jib36.55
SAIL LIMITS
Headsails1  Spinnakers4
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.
ORC Ref  04560002D4FIssued on 28/02/2023Valid until 12/02/2024
VPP ver: 2023 1.00 | © ORC | www.orc.org

Club
Certificate
2023

Boat

ENCORE

USA 7288

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG984.1822.3743.2709.5692.1682.1673.1
52°654.3562.0520.7503.3495.7491.1486.5
60°626.2544.3508.4492.1484.4479.7474.8
75°610.6534.3500.1482.3471.6465.1457.1
90°623.7539.9500.7479.8465.9455.7442.0
110°637.4532.8488.7466.3451.0440.5425.5
120°655.5542.6492.4466.3447.4432.4408.8
135°733.5588.3514.8480.0457.2438.0405.4
150°862.4682.9577.4521.5494.0475.2445.4
Run VMG995.8788.6666.7602.2570.4533.2479.5
Selected Courses
Windward / Leeward989.9805.5704.9655.9631.3607.6576.3
All purpose766.8636.1569.8537.6520.0506.0487.2
Single Number Scoring Options
CourseTime On
Distance		Time On
Time
Windward / Leeward683.60.8777
All purpose556.21.0788
 
Custom scoring options for Australia
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Custom scoring options for Austria
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7915
Downwind "popa"0.9059
70% up, 30% down "Ilhabela"0.8227
30% up, 70% down "Ilhabela-inverso"0.8682
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Predominantly Upwind595.91.0068
Predominantly Downwind568.41.0557
Custom scoring options for Canada
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low701.50.8553
Triple Number All Purpose Medium552.11.0867
Triple Number All Purpose High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Predominantly Upwind595.91.0068
Predominantly Downwind568.41.0557
Predominantly Upwind Low770.20.7790
Predominantly Upwind Medium612.70.9793
Predominantly Upwind High576.11.0414
Predominantly Downwind Low774.50.7747
Predominantly Downwind Medium566.81.0586
Predominantly Downwind High487.11.2318
Chicago-Mac Upwind0.9906
Chicago-Mac All Purpose1.0120
Chicago-Mac Downwind1.0388
Bayview-Mac Cove Island0.9476
Bayview-Mac Shore0.9582
Scoring OptionTime On
Distance		Time On
Time
Predominantly Reaching529.91.1322
Predominantly Reaching Low640.60.9366
Predominantly Reaching Medium524.11.1448
Predominantly Reaching High469.91.2768
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low975.70.6149
5-Band Low / Medium824.30.7279
5-Band Medium668.40.8977
5-Band Medium / High610.50.9829
5-Band High581.71.0315
Custom scoring options for Cyprus
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Denmark
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance604.5
Triple Number Coastal/Long Distance Low701.5
Triple Number Coastal/Long Distance Medium552.1
Triple Number Coastal/Long Distance High502.5
Triple Number Windward/Leeward Low897.7
Triple Number Windward/Leeward Medium678.5
Triple Number Windward/Leeward High601.8
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Estonia
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Finland
Scoring OptionTime On
Distance		Time On
Time
FinRating (Coastal/Long Distance)604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for France
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8553
Triple Number Coastal/Long Distance Medium1.0867
Triple Number Coastal/Long Distance High1.1941
Triple Number Windward/Leeward Low0.6684
Triple Number Windward/Leeward Medium0.8843
Triple Number Windward/Leeward High0.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Greece
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Hungary
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Custom scoring options for Israel
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Japan
Scoring OptionTime On
Distance		Time On
Time
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low701.5
Triple Number Coastal/Long Distance Medium552.1
Triple Number Coastal/Long Distance High502.5
Triple Number Windward/Leeward Low897.7
Triple Number Windward/Leeward Medium678.5
Triple Number Windward/Leeward High601.8
Predominantly Upwind595.9
Predominantly Downwind568.4
Predominantly Reaching543.4
Custom scoring options for Lithuania
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8553
Triple Number Coastal/Long Distance Medium1.0867
Triple Number Coastal/Long Distance High1.1941
Triple Number Windward/Leeward Low0.6684
Triple Number Windward/Leeward Medium0.8843
Triple Number Windward/Leeward High0.9970
Coastal/Long Distance0.9926
Predominantly Upwind1.0068
Predominantly Downwind1.0557
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.8553
Tretall Distanseseilas Mellomvind1.0867
Tretall Distanseseilas Mye vind1.1941
Tretall Pølsebane Lite vind0.6684
Tretall Pølsebane Mellomvind0.8843
Tretall Pølsebane Mye vind0.9970
Distanseseilas ett tall (OSN 8-16kn)0.9926
Distanseseilas ett tall (APH 6-20kn)1.0788
Enkeltall Motvind1.0068
Enkeltall Medvind1.0557
Custom scoring options for Portugal
Scoring OptionTime On
Distance		Time On
Time
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Coastal/Long Distance604.50.9926
Custom scoring options for Russia
Scoring OptionTime On
Distance		Time On
Time
Predominantly Upwind595.91.0068
Predominantly Downwind568.41.0557
Custom scoring options for South Africa
Scoring OptionTime On
Distance		Time On
Time
Cape Doctor Inshore585.71.0244
Cape Doctor Coastal492.91.2173
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8553
Triple Number Coastal/Long Distance Medium1.0867
Triple Number Coastal/Long Distance High1.1941
Triple Number Windward/Leeward Low0.6684
Triple Number Windward/Leeward Medium0.8843
Triple Number Windward/Leeward High0.9970
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.8553
Triple Number Coastal/Long Distance Medium1.0867
Triple Number Coastal/Long Distance High1.1941
Triple Number Windward/Leeward Low0.6684
Triple Number Windward/Leeward Medium0.8843
Triple Number Windward/Leeward High0.9970
Custom scoring options for Sweden
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Predominantly Upwind595.91.0068
Predominantly Downwind568.41.0557
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for Ukraine
Scoring OptionTime On
Distance		Time On
Time
Coastal/Long Distance604.50.9926
Triple Number Coastal/Long Distance Low701.50.8553
Triple Number Coastal/Long Distance Medium552.11.0867
Triple Number Coastal/Long Distance High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance990.5759.9638.8573.2539.8511.8469.1
Custom scoring options for United States of America
Scoring OptionTime On
Distance		Time On
Time
Triple Number All Purpose Low701.50.8553
Triple Number All Purpose Medium552.11.0867
Triple Number All Purpose High502.51.1941
Triple Number Windward/Leeward Low897.70.6684
Triple Number Windward/Leeward Medium678.50.8843
Triple Number Windward/Leeward High601.80.9970
Predominantly Upwind595.91.0068
Predominantly Downwind568.41.0557
Predominantly Upwind Low770.20.7790
Predominantly Upwind Medium612.70.9793
Predominantly Upwind High576.11.0414
Predominantly Downwind Low774.50.7747
Predominantly Downwind Medium566.81.0586
Predominantly Downwind High487.11.2318
Chicago-Mac Upwind0.9906
Chicago-Mac All Purpose1.0120
Chicago-Mac Downwind1.0388
Bayview-Mac Cove Island0.9476
Bayview-Mac Shore0.9582
Harvest Moon Regatta491.01.2221
Scoring OptionTime On
Distance		Time On
Time
San Francisco Bay Heavy585.71.0243
San Francisco Bay Medium666.60.9001
Predominantly Reaching529.91.1322
Predominantly Reaching Low640.60.9366
Predominantly Reaching Medium524.11.1448
Predominantly Reaching High469.91.2768
Windward/Leeward 60-40 Low898.80.6676
Windward/Leeward 60-40 Medium694.60.8638
Windward/Leeward 60-40 High628.80.9542
5-Band
Windward/Leeward		Time On
Distance		Time On
Time
5-Band Low975.70.6149
5-Band Low / Medium824.30.7279
5-Band Medium668.40.8977
5-Band Medium / High610.50.9829
5-Band High581.71.0315
ORC Ref  04560002D4FIssued on 28/02/2023Valid until 12/02/2024
VPP ver: 2023 1.00 | © ORC | www.orc.org

Club
Certificate
2023

Boat

ENCORE

USA 7288

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassIrwin 41 CitationMeasurement29/09/2021HINPlan reviewHull constructionSolidCarbon RudderNoLight stanchionsNoTrim tabNo
LOA12.445Max. Beam4.017Draft2.403Displacement8,645Wetted area31.19IMS L10.047LSM09.868Acc. length12.445Sink (kg/mm) 22.88
VCGD0.180VCGM0.185RM Rated (kg·m) 180.3Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeFeathering 2 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.534PBW0.141PIPA0.0089
PSD0.028PHD0.116PHL0.132
PSA19.0°ESL0.927
ST10.028ST20.116ST30.116
ST40.049ST50.000
RIG
Forestay tensionAftInner stayFixedCarbon mastNoHeadsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays1Spreaders2Rotating mastNo
P14.210IG16.335ISP16.396MDT10.120MDL10.200MDT20.116MDL20.162TL2.768MW0.153GO0.190
E4.810J5.110BAS1.790FSD0.045SFJ0.335SPLWPLTPS5.620BD0.210MWTMCG
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM entered directlyRM entered181.9Flotation Date29/09/2021MeasurerCommentCushions on
SFFP0.978FFMFF1.313LCFcl6.946SG1.0100
SAFP11.309FAMFA1.082LCFsh7.231HBI1.135
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
TANKSIdDescriptionSp.WghtCapacityConditionLCGVCG2Water GRP Stbd aft7608.900.001Fuel GRP Stbd settee0.900076385.700.00Total deductible345.700.00
OTHER ITEMSIdKindDescriptionWeightLCGVCG1MiscellaneousRadar unit on SS mast2512.003.102Battery12V engine battery, under stbd nav seat257.100.101Battery12V house battery, stbd centerline256.400.10Total deductible0
ORC Ref  04560002D4FIssued on 28/02/2023Valid until 12/02/2024
VPP ver: 2023 1.00 | © ORC | www.orc.org

Club
Certificate
2023

Boat

ENCORE

USA 7288

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMain0.100.841.562.843.8538.0527/08/2021
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentGenoa0.100.911.793.575.377.210.00NoNo 61.9126/08/2021
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentASpin18.6015.9717.299.579.03106%136.2907/09/2022Sail ID: OUS146615-001Aspin
ORC Ref  04560002D4FIssued on 28/02/2023Valid until 12/02/2024
VPP ver: 2023 1.00 | © ORC | www.orc.org