International
Certificate
2022

Boat

WHIRLWIND

USA 56

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 Angles42.6°41.2°39.4°37.6°37.0°37.2°36.9°
Beat VMG3.354.104.684.955.045.085.17
52°5.116.126.666.896.987.037.14
60°5.406.366.817.067.207.287.40
75°5.606.526.937.267.577.777.95
90°5.796.747.027.307.718.118.66
110°5.926.887.427.828.168.499.12
120°5.786.827.418.048.569.009.86
135°5.166.437.107.738.489.3611.32
150°4.395.536.487.057.528.1410.07
Run VMG3.804.795.626.116.517.058.72
Gybe Angles144.4°147.4°149.4°150.5°147.1°144.6°141.2°

APH: 557.2

CDL: 8.532

GPH: 624.2

CertNo: US5688

BOAT
ClassJ 88DesignerJohnstoneBuilderJ BoatsAge date01/2016Series date06/2014Offset fileJ88.offData fileUSA 56
HULL
Length Overall8.960 mMaximum Beam2.854 mDraft1.968 mDisplacement2,470 kgDLR4.0845IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.260%
PROPELLER
InstallationStrutTypeFolding 2 bladesDiameter0.360m
CREW
Maximum weight538 kgMinimum weight404 kg * when appliedNon Manual PowerNoCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail26.6727.36Headsail Luffed21.0721.07Headsail FlyingSymmetricAsymmetric94.6594.65 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS (m²)
Trysail7.19Storm Jib6.85Heavy Weather Jib18.48
SAIL LIMITS
Headsails5  Spinnakers4
STABILITY
Righting Moment56.6 kg·mStability Index121.2
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  04560002C4DIssued on 06/02/2023Valid until 20/02/2023
VPP ver: 2022 1.04 | © ORC | www.orc.org

International
Certificate
2022

Boat

WHIRLWIND

USA 56

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 VMG1074.3878.4768.8727.6714.5709.2696.1
52°704.1588.2540.3522.6515.8512.2504.1
60°667.1566.1528.6509.7499.9494.4486.5
75°643.1552.4519.5495.7475.7463.3452.8
90°621.6534.4512.6493.4467.1443.8415.7
110°607.8523.0485.4460.6441.1423.9394.8
120°622.7527.9486.0447.5420.5400.0364.9
135°697.8560.0507.0465.7424.7384.6318.1
150°820.6651.1555.2510.4478.8442.2357.5
Run VMG947.6751.8641.1589.1552.9510.6412.8
Selected Courses
Windward / Leeward1010.9815.1705.0658.4633.7609.9554.4
All purpose778.3641.3574.6541.3518.9499.4462.6
Single Number Scoring Options
CourseTime On DistanceTime On Time
Windward / Leeward686.00.8746
All purpose557.21.0768
 
Custom scoring options for Australia
Scoring OptionTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Custom scoring options for Austria
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Brazil
Scoring OptionTime On Time
Upwind "bolina"0.7542
Downwind "popa"0.9533
70% up, 30% down "Ilhabela"0.8046
30% up, 70% down "Ilhabela-inverso"0.8833
Custom scoring options for Bulgaria
Scoring OptionTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Predominantly Upwind609.10.9850
Predominantly Downwind556.81.0776
Custom scoring options for Canada
Scoring OptionTime On DistanceTime On Time
Triple Number All Purpose Low709.80.8453
Triple Number All Purpose Medium555.11.0808
Triple Number All Purpose High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Predominantly Upwind609.10.9850
Predominantly Downwind556.81.0776
Predominantly Upwind Low804.60.7457
Predominantly Upwind Medium631.80.9497
Predominantly Upwind High589.21.0183
Predominantly Downwind Low758.20.7913
Predominantly Downwind Medium553.31.0845
Predominantly Downwind High448.71.3373
Chicago-Mac Upwind0.9692
Chicago-Mac All Purpose1.0100
Chicago-Mac Downwind1.0600
Bayview-Mac Cove Island0.9367
Bayview-Mac Shore0.9404
Victoria-Maui1.1436
Custom scoring options for Cyprus
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Denmark
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Spain
Scoring OptionTime On Distance
Coastal/Long Distance605.8
Triple Number Coastal/Long Distance Low709.8
Triple Number Coastal/Long Distance Medium555.1
Triple Number Coastal/Long Distance High490.5
Triple Number Windward/Leeward Low913.0
Triple Number Windward/Leeward Medium680.8
Triple Number Windward/Leeward High595.1
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Estonia
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Finland
Scoring OptionTime On DistanceTime On Time
FinRating (Coastal/Long Distance)605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for France
Scoring OptionTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Custom scoring options for Germany
Scoring OptionTime On Time
Triple Number Coastal/Long Distance Low0.8453
Triple Number Coastal/Long Distance Medium1.0808
Triple Number Coastal/Long Distance High1.2233
Triple Number Windward/Leeward Low0.6572
Triple Number Windward/Leeward Medium0.8813
Triple Number Windward/Leeward High1.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Greece
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Hungary
Scoring OptionTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Custom scoring options for Israel
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Japan
Scoring OptionTime On DistanceTime On Time
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Korea
Scoring OptionTime On Distance
Triple Number Coastal/Long Distance Low709.8
Triple Number Coastal/Long Distance Medium555.1
Triple Number Coastal/Long Distance High490.5
Triple Number Windward/Leeward Low913.0
Triple Number Windward/Leeward Medium680.8
Triple Number Windward/Leeward High595.1
Predominantly Upwind609.1
Predominantly Downwind556.8
Predominantly Reaching536.8
Custom scoring options for Lithuania
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Netherlands
Scoring OptionTime On Time
Triple Number Coastal/Long Distance Low0.8453
Triple Number Coastal/Long Distance Medium1.0808
Triple Number Coastal/Long Distance High1.2233
Triple Number Windward/Leeward Low0.6572
Triple Number Windward/Leeward Medium0.8813
Triple Number Windward/Leeward High1.0083
Coastal/Long Distance0.9905
Predominantly Upwind0.9850
Predominantly Downwind1.0776
Custom scoring options for Norway
Scoring OptionTime On Time
Tretall Distanseseilas Lite vind0.8453
Tretall Distanseseilas Mellomvind1.0808
Tretall Distanseseilas Mye vind1.2233
Tretall Pølsebane Lite vind0.6572
Tretall Pølsebane Mellomvind0.8813
Tretall Pølsebane Mye vind1.0083
Distanseseilas ett tall (OSN 8-16kn)0.9905
Distanseseilas ett tall (APH 6-20kn)1.0768
Enkeltall Motvind0.9850
Enkeltall Medvind1.0776
Custom scoring options for Portugal
Scoring OptionTime On DistanceTime On Time
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Coastal/Long Distance605.80.9905
Custom scoring options for Russia
Scoring OptionTime On DistanceTime On Time
Predominantly Upwind609.10.9850
Predominantly Downwind556.81.0776
Custom scoring options for South Africa
Scoring OptionTime On DistanceTime On Time
Cape Doctor Inshore571.11.0507
Cape Doctor Coastal473.71.2667
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Custom scoring options for Slovenia
Scoring OptionTime On Time
Triple Number Coastal/Long Distance Low0.8453
Triple Number Coastal/Long Distance Medium1.0808
Triple Number Coastal/Long Distance High1.2233
Triple Number Windward/Leeward Low0.6572
Triple Number Windward/Leeward Medium0.8813
Triple Number Windward/Leeward High1.0083
Custom scoring options for Switzerland
Scoring OptionTime On Time
Triple Number Coastal/Long Distance Low0.8453
Triple Number Coastal/Long Distance Medium1.0808
Triple Number Coastal/Long Distance High1.2233
Triple Number Windward/Leeward Low0.6572
Triple Number Windward/Leeward Medium0.8813
Triple Number Windward/Leeward High1.0083
Custom scoring options for Sweden
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Predominantly Upwind609.10.9850
Predominantly Downwind556.81.0776
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for Ukraine
Scoring OptionTime On DistanceTime On Time
Coastal/Long Distance605.80.9905
Triple Number Coastal/Long Distance Low709.80.8453
Triple Number Coastal/Long Distance Medium555.11.0808
Triple Number Coastal/Long Distance High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1004.6766.1640.8576.1539.0504.7442.6
Custom scoring options for United States of America
Scoring OptionTime On DistanceTime On Time
Triple Number All Purpose Low709.80.8453
Triple Number All Purpose Medium555.11.0808
Triple Number All Purpose High490.51.2233
Triple Number Windward/Leeward Low913.00.6572
Triple Number Windward/Leeward Medium680.80.8813
Triple Number Windward/Leeward High595.11.0083
Predominantly Upwind609.10.9850
Predominantly Downwind556.81.0776
Predominantly Upwind Low804.60.7457
Predominantly Upwind Medium631.80.9497
Predominantly Upwind High589.21.0183
Predominantly Downwind Low758.20.7913
Predominantly Downwind Medium553.31.0845
Predominantly Downwind High448.71.3373
Chicago-Mac Upwind0.9692
Chicago-Mac All Purpose1.0100
Chicago-Mac Downwind1.0600
Bayview-Mac Cove Island0.9367
Bayview-Mac Shore0.9404
Harvest Moon Regatta489.71.2251
Victoria-Maui1.1436
Scoring OptionTime On Time
Predominantly Reaching1.0235
Predominantly Reaching Low0.8621
Predominantly Reaching Medium1.0296
Predominantly Reaching High1.1657
5-Band
Windward/Leeward		Time On DistanceTime On Time
5-Band Low995.90.6025
5-Band Low / Medium834.60.7189
5-Band Medium670.90.8943
5-Band Medium / High608.60.9859
5-Band High564.01.0638
ORC Ref  04560002C4DIssued on 06/02/2023Valid until 20/02/2023
VPP ver: 2022 1.04 | © ORC | www.orc.org

International
Certificate
2022

Boat

WHIRLWIND

USA 56

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassJ 88Measurement02/02/2023HINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA8.960Max. Beam2.854Draft1.968Displacement2,470Wetted area16.54IMS L8.639LSM08.456Acc. length8.960Sink (kg/mm) 12.69
VCGD-0.332VCGM-0.250RM Rated (kg·m) 56.6Limit of positive stability(°) 124.8Stability Index121.2
PROPELLER
Propeller TypeFolding 2 blades
InstallationStrutTwin screwNoHydro generatorNo
PRD0.360PBW0.113PIPA0.0035
EDL1.841ST10.065ST20.180
ST30.180ST40.110ST50.270
RIG
Forestay tensionAftInner stayNone FittedCarbon mastYesHeadsail furlerYesMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P11.205IG11.605ISP12.719MDT10.100MDL10.153MDT20.100MDL20.118TL1.862MW0.143GO0.170
E3.665J3.430BAS1.296FSD0.027SFJ0.201SPLWPLTPS5.640BD0.100MWT76.00MCG4.640
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodBoom incliningFlotation Date02/02/2023MeasurerComment
SFFP0.759FFM1.005FF1.006LCFcl4.933SG1.0200
SAFP8.905FAM0.744FA0.745LCFsh5.138HBI0.861
W155.1W255.1W355.1W455.1LCFD4.574
PD1259.5PD2260.1PD3260.8PD4260.2
WD3.395PLM9000.00GSA1.0RSA1.0RM56.6
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04560002C4DIssued on 06/02/2023Valid until 20/02/2023
VPP ver: 2022 1.04 | © ORC | www.orc.org

International
Certificate
2022

Boat

WHIRLWIND

USA 56

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateCommentMain0.471.051.692.593.1926.6717/01/2023Fusion M5
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateCommentAP Jib0.080.490.931.832.733.5811.55YesNo 21.0717/01/2022Fusion M5
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA214.8012.0013.408.558.18105%94.6517/01/2023
ORC Ref  04560002C4DIssued on 06/02/2023Valid until 20/02/2023
VPP ver: 2022 1.04 | © ORC | www.orc.org