Double HandedClub Certificate2026
ThunderchildRSA-1027
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
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 Angles45.0°42.4°39.9°38.6°38.1°37.7°37.4°38.3°39.6°
Beat VMG3.134.415.235.605.825.966.066.126.00
52°4.886.677.688.108.318.458.558.658.61
60°5.237.018.008.398.588.718.818.938.92
75°5.507.258.258.698.929.089.219.379.45
90°5.377.118.208.769.139.409.599.8910.11
110°5.237.208.378.869.229.539.8210.4311.04
120°5.057.058.379.049.479.8510.2310.9811.65
135°4.526.437.898.779.4210.0810.8412.1613.34
150°3.745.396.747.878.699.329.9611.7314.30
Run VMG3.244.675.846.817.578.118.6310.1612.38
Gybe Angles139.0°141.3°144.4°149.1°152.8°153.4°151.2°146.8°147.4°
APH ToD:459.5CDL: 12.450APH ToT: 1.3058CertNo:ZAD176
BOAT
ClassLavranos 52DesignerLavranosBuilderOwnerAge date01/1988Series date01/1988Offset file1052L.OFFData fileRSA1027
HULL
Length Overall15.740Maximum Beam4.748Draft3.149Displacement10,950DLR4.9242IMS DivisionPerformanceDynamic Allowance0.000%Age Allowance0.650%RS Assessment-0.356%
PROPELLER
InstallationShaft exposedTypeFolding 3 bladesDiameter0.450m
CREW
Maximum weight170(default)Minimum weight120 ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail93.2494.81Headsail Luffed62.5562.55Headsail FlyingSymmetricAsymmetric256.67256.67 (All asymmetric spinnakers with SHW/SFL > 85%)
STORM SAIL AREAS Maximum (m²)
Trysail27.90Storm Jib20.06Heavy Weather Jib54.15
SAIL LIMITS
Headsails7Spinnakers5
STABILITY
Righting Moment 407.6 Stability Index 121.0
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  04620004C6H Issued on 21/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Double HandedClub Certificate2026
ThunderchildRSA-1027
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
Time Allowances in secs/NM
Wind Velocity 4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Beat VMG1148.8816.3688.8642.4618.8604.4594.4588.4600.4
52°738.0540.0468.7444.6433.0426.0421.1416.1418.2
60°688.4513.8449.8429.2419.4413.2408.7403.2403.5
75°654.2496.7436.4414.2403.7396.5390.9384.1380.8
90°670.0506.2439.0410.8394.3383.1375.5363.8356.2
110°688.2499.9429.9406.2390.5377.7366.7345.1326.2
120°712.6510.8430.1398.1380.1365.4352.0327.8309.0
135°796.7559.5456.1410.5382.4357.3332.0296.1269.9
150°962.1668.3534.1457.6414.1386.2361.6307.0251.7
Run VMG1111.0771.6616.7528.4475.7443.9417.1354.5290.7
Selected Courses
Windward / Leeward1129.9794.0652.7585.4547.2524.2505.7471.4445.5
All purpose857.7614.4515.4472.6448.5432.3418.9396.4380.7
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward565.21.0616
All purpose459.51.3058
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.9224
Downwind "popa"1.1641
70% up, 30% down "Ilhabela"0.9837
30% up, 70% down "Ilhabela-inverso"1.0793
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Predominantly Upwind499.51.2011
Predominantly Downwind456.01.3156
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP474.91.2633 Predom. Rc High372.71.6099 5B SF Bay L/M605.00.9917 TriNum AP Low564.91.0621 Predom. Dn Low675.10.8887 5B SF Bay Med535.81.1198 TriNum AP Med458.11.3098 Predom. Dn L/M509.61.1773 5B SF Bay M/H491.91.2198 TriNum AP High413.81.4499 Predom. Dn Med443.81.3520 5B SF Bay High463.01.2960 TriNum W/L Low757.30.7923 Predom. Dn M/H397.51.5095 5B AP Low622.10.9644 TriNum W/L Med563.01.0658 Predom. Dn High362.51.6551 5B AP L/M505.01.1881 TriNum W/L Hig497.51.2061 ChiMac Up Low610.20.9833 5B AP Med452.91.3249 Predom. Upwind518.21.1579 ChiMac Up Med559.31.0727 5B AP M/H419.91.4290 Predom. Reaching451.01.3303 ChiMac Up High498.41.2040 5B AP High397.61.5091 Predom. Downwind474.31.2651 ChiMac Off Low587.71.0210 5B W/L Low842.60.7120 Predom. Up Low682.20.8795 ChiMac Off Med524.11.1447 5B W/L L/M634.20.9461 Predom. Up L/M536.91.1176 ChiMac Off High446.51.3439 5B W/L Med555.11.0810 Predom. Up Med488.71.2279 ChiMac AP Low596.51.0058 5B W/L M/H506.51.1845 Predom. Up M/H461.11.3012 ChiMac AP Med540.11.1110 5B W/L High472.91.2688 Predom. Up High446.91.3424 ChiMac AP High471.51.2725 W/L 60-40 Low847.60.7079 Predom. Rc Low605.30.9913 BayMac Cove Island682.10.8796 W/L 60-40 L/M643.50.9323 Predom. Rc L/M474.01.2659 BayMac Shore677.10.8861 W/L 60-40 Med568.91.0548 Predom. Rc Med426.01.4086 Harvest Moon402.21.4918 W/L 60-40 M/H524.61.1436 Predom. Rc M/H393.71.5240 5B SF Bay Low713.40.8411 W/L 60-40 High496.61.2082      SA/DSPL Up31.34SA/DSPL Dn70.40
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance498.8
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating498.81.2030
FinRating, kevyt tuuli829.01.2063
FinRating, kova tuuli399.41.2520
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance1.2030
Triple Number Coastal/Long Distance Low1.0621
Triple Number Coastal/Long Distance Medium1.3099
Triple Number Coastal/Long Distance High1.4499
Triple Number Windward/Leeward Low0.8295
Triple Number Windward/Leeward Medium1.0658
Triple Number Windward/Leeward High1.2061
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
For information
General Purpose Handicap (GPH)510.2
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Saronikos S All Purpose515.81.1633
Saronikos S Upwind585.41.0249
Saronikos S Downwind427.81.4026
Saronikos N All Purpose515.81.1633
Saronikos N Upwind606.30.9896
Saronikos N Downwind468.91.2797
Saronikos SW All Purpose514.31.1667
Saronikos SW Upwind593.31.0113
Saronikos SW Downwind434.41.3811
Saronikos NE All Purpose556.71.0778
Saronikos NE Upwind568.91.0546
Saronikos NE Downwind522.91.1474
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose474.91.2633
5-Band All Purpose Low676.00.8875
5-Band All Purpose L/M522.11.1492
5-Band All Purpose Med465.61.2887
5-Band All Purpose M/H429.21.3979
5-Band All Purpose High405.11.4812
Single Number Predominant Upwind498.41.2038
Single Number Predominant Reaching435.31.3784
Single Number Predominant Downwind456.91.3131
5-Band 50-50 Windward/Leeward Low842.60.7120
5-Band 50-50 Windward/Leeward L/M634.20.9461
5-Band 50-50 Windward/Leeward Med555.11.0810
5-Band 50-50 Windward/Leeward M/H506.51.1845
5-Band 50-50 Windward/Leeward High472.91.2688
5-Band 60-40 Windward/Leeward Low847.60.7079
5-Band 60-40 Windward/Leeward L/M643.50.9323
5-Band 60-40 Windward/Leeward Med568.91.0548
5-Band 60-40 Windward/Leeward M/H524.61.1436
5-Band 60-40 Windward/Leeward High496.61.2082
Triple Number 50-50 Windward/Leeward Low757.30.7923
Triple Number 50-50 Windward/Leeward Med563.01.0657
Triple Number 50-50 Windward/Leeward High497.51.2061
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward578.91.0365
Triple Number 60-40 Windward/Leeward Low763.30.7860
Triple Number 60-40 Windward/Leeward Med576.21.0413
Triple Number 60-40 Windward/Leeward High516.91.1608
Triple Number All-Purpose Low612.30.9799
Triple Number All-Purpose Med471.31.2730
Triple Number All-Purpose High422.71.4196
Triple Number Predominant Upwind Low626.30.9579
Triple Number Predominant Upwind Med495.01.2121
Triple Number Predominant Upwind High463.21.2954
Triple Number Predominant Reaching Low554.31.0824
Triple Number Predominant Reaching Med438.71.3678
Triple Number Predominant Reaching High380.51.5770
Triple Number Predominant Downwind Low607.00.9885
Triple Number Predominant Downwind Med450.61.3317
Triple Number Predominant Downwind High378.61.5847
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low564.9
Triple Number Coastal/Long Distance Medium458.1
Triple Number Coastal/Long Distance High413.8
Triple Number Windward/Leeward Low723.3
Triple Number Windward/Leeward Medium563.0
Triple Number Windward/Leeward High497.5
Predominantly Upwind499.5
Predominantly Downwind456.0
Predominantly Reaching439.9
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.0621
Triple Number Coastal/Long Distance Medium1.3099
Triple Number Coastal/Long Distance High1.4499
Triple Number Windward/Leeward Low0.8295
Triple Number Windward/Leeward Medium1.0658
Triple Number Windward/Leeward High1.2061
Coastal/Long Distance1.2030
Predominantly Upwind1.2011
Predominantly Downwind1.3156
For information
General Purpose Handicap (GPH)510.2
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.3058
Distanseseilas Trippeltall svak vind1.0621
Distanseseilas Trippeltall mellomvind1.3099
Distanseseilas Trippeltall sterk vind1.4499
Pølsebane Trippeltall svak vind0.8295
Pølsebane Trippeltall mellomvind1.0658
Pølsebane Trippeltall sterk vind1.2061
Motvind Singeltall1.2011
Medvind Singeltall1.3156
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Coastal/Long Distance498.81.2030
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind499.51.2011
Predominantly Downwind456.01.3156
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore453.31.3236
Cape Doctor Coastal385.41.5567
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.0621
Triple Number Coastal/Long Distance Medium1.3099
Triple Number Coastal/Long Distance High1.4499
Triple Number Windward/Leeward Low0.8295
Triple Number Windward/Leeward Medium1.0658
Triple Number Windward/Leeward High1.2061
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.0621
Triple Number Coastal/Long Distance Medium1.3099
Triple Number Coastal/Long Distance High1.4499
Triple Number Windward/Leeward Low0.8295
Triple Number Windward/Leeward Medium1.0658
Triple Number Windward/Leeward High1.2061
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Predominantly Upwind499.51.2011
Predominantly Downwind456.01.3156
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance498.81.2030
Triple Number Coastal/Long Distance Low564.91.0621
Triple Number Coastal/Long Distance Medium458.11.3099
Triple Number Coastal/Long Distance High413.81.4499
Triple Number Windward/Leeward Low723.30.8295
Triple Number Windward/Leeward Medium563.01.0658
Triple Number Windward/Leeward High497.51.2061
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1128.0791.7614.8529.5478.5448.7423.3380.5363.6
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP474.91.2633 Predom. Dn High362.51.6551 5B AP M/H419.91.4290 TriNum AP Low564.91.0621 Predom. Rc Low605.30.9913 5B AP High397.61.5091 TriNum AP Med458.11.3098 Predom. Rc L/M474.01.2659 5B SF Bay Low713.40.8411 TriNum AP High413.81.4499 Predom. Rc Med426.01.4086 5B SF Bay L/M605.00.9917 TriNum W/L Low757.30.7923 Predom. Rc M/H393.71.5240 5B SF Bay Med535.81.1198 TriNum W/L Med563.01.0658 Predom. Rc High372.71.6099 5B SF Bay M/H491.91.2198 TriNum W/L Hig497.51.2061 5B W/L Low842.60.7120 5B SF Bay High463.01.2960 Predom. Upwind518.21.1579 5B W/L L/M634.20.9461 ChiMac Up Low610.20.9833 Predom. Reaching451.01.3303 5B W/L Med555.11.0810 ChiMac Up Med559.31.0727 Predom. Downwind474.31.2651 5B W/L M/H506.51.1845 ChiMac Up High498.41.2040 Predom. Up Low682.20.8795 5B W/L High472.91.2688 ChiMac Off Low587.71.0210 Predom. Up L/M536.91.1176 W/L 60-40 Low847.60.7079 ChiMac Off Med524.11.1447 Predom. Up Med488.71.2279 W/L 60-40 L/M643.50.9323 ChiMac Off High446.51.3439 Predom. Up M/H461.11.3012 W/L 60-40 Med568.91.0548 ChiMac AP Low596.51.0058 Predom. Up High446.91.3424 W/L 60-40 M/H524.61.1436 ChiMac AP Med540.11.1110 Predom. Dn Low675.10.8887 W/L 60-40 High496.61.2082 ChiMac AP High471.51.2725 Predom. Dn L/M509.61.1773 5B AP Low622.10.9644 BayMac Cove Island682.10.8796 Predom. Dn Med443.81.3520 5B AP L/M505.01.1881 BayMac Shore677.10.8861 Predom. Dn M/H397.51.5095 5B AP Med452.91.3249 Harvest Moon402.21.4918      SA/DSPL Up31.34SA/DSPL Dn70.40
ORC Ref  04620004C6H Issued on 21/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Double HandedClub Certificate2026
ThunderchildRSA-1027
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassLavranos 52Measurement23/09/1992HINPlan reviewHull constructionCoredCarbon rudderNoLight stanchionsNoTrim tabNo
Length overall15.740Maximum beam4.748Draft3.149Displacement10,950Wetted area47.65IMS L13.252LSM013.051Accomod. length15.431Sink (kg/mm) 34.01
VCGD-0.116VCGM-0.071 RM Rated (kg·m) 407.6Limit of positive stability(°) 119.6 Stability Index 121.0 BLR index 0.0000Default crew weight170 Declared crew weight
Centerboard weightList angleCanting keel angle
PROPELLER
Propeller TypeFolding 3 blades
InstallationShaft exposedTwin screwNoHydro generatorNo
PRD0.450PBW0.155PIPA0.0053
PSD0.030PHD0.070PHL0.142
PSA17.5°ESL0.900
ST10.030ST20.120ST30.120
ST40.060ST50.195
RIG
BackstayAdjustable (NMP)ForestayFixedInner forestayNot installedMast materialCarbonSingle headsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoBase of mastFixedRunning backstaysNoCheckstaysNoSpreaders4Rotating mastNo
P21.985IG20.875ISP24.312MDT10.138MDL10.248MDT2MDL2TLTaperMW0.248GO
E7.250J5.860BAS2.230FSDSFJ0.000SPLWPLTPS7.570BD0.360MWTMCG
PYMDT1YMDL1YMDT2YMDL2YTLYBASYEYBDYIYEB
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodRM estimatedFlotation Date14/02/2017
SFFP0.341FFM1.544FF1.543LCFcl8.451SG1.0272
SAFP14.200FAM1.234FA1.234LCFsh8.773HBI1.300
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible
ORC Ref  04620004C6H Issued on 21/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Double HandedClub Certificate2026
ThunderchildRSA-1027
ORC
Central Rating Office
Issuing certificates for
SOUTH AFRICA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment10.201.532.744.595.8893.24
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment30.140.971.663.114.666.1719.87YesNo 62.55
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateComment126.0921.6723.8813.1112.05109%256.67
NON MANUAL POWER CONTROLS (NMP)
SheetsYesMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsYes
ORC Ref  04620004C6H Issued on 21/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org