Non Spin/HSFClub 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 Angles45.1°42.5°40.1°38.1°37.1°37.0°36.6°36.3°37.1°
Beat VMG3.094.395.345.846.096.256.366.506.44
52°4.836.647.828.338.558.698.798.938.95
60°5.186.988.098.588.798.939.049.209.26
75°5.467.218.268.799.099.299.449.679.80
90°5.327.068.188.799.219.549.8010.1910.49
110°4.546.277.508.388.959.439.9010.8111.43
120°3.945.687.058.088.739.249.7310.8912.27
135°3.244.836.177.298.158.759.2310.2911.72
150°2.654.005.226.307.248.028.589.4510.43
Run VMG2.303.464.525.466.357.227.999.059.99
Gybe Angles137.2°140.8°145.7°147.5°173.0°174.8°177.2°178.9°178.9°
APH ToD:482.8CDL: 13.111APH ToT: 1.2427CertNo:ZAN176
BOAT
ClassLavranos 52DesignerLavranosBuilderOwnerAge date01/1988Series date01/1988Offset file1052L.OFFData fileRSA1027
HULL
Length Overall15.740Maximum Beam4.748Draft3.149Displacement10,950DLR4.9242IMS DivisionPerformanceDynamic Allowance0.100%Age Allowance0.650%RS Assessment-0.356%
PROPELLER
InstallationShaft exposedTypeFolding 3 bladesDiameter0.450m
CREW
Maximum weight1,006(default)Minimum weight855 ✱ when appliedCrew Arm Extension
SAIL AREAS (m²)
MeasuredRatedMainsail93.2494.81Headsail Luffed62.5562.55Headsail FlyingSymmetricAsymmetric
STORM SAIL AREAS Maximum (m²)
Trysail27.90Storm Jib20.06Heavy Weather Jib54.15
SAIL LIMITS
Headsails7
✱ Zero set flying
Spinnakers0
✱ No spinnaker pole aboard
STABILITY
Righting Moment 407.2 Stability Index 117.6
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  04620004ATD Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub 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 VMG1163.7819.6674.2616.0590.9576.3566.0554.2558.7
52°746.1542.0460.4432.1420.9414.2409.5403.2402.1
60°694.7516.0444.8419.8409.5403.0398.1391.3388.7
75°659.2499.2435.6409.5395.9387.6381.4372.3367.5
90°677.3509.6440.2409.7391.0377.5367.3353.3343.3
110°792.4573.9479.7429.6402.2381.7363.7332.9315.0
120°914.2633.5510.7445.8412.2389.7369.8330.6293.5
135°1111.7745.7583.1494.0441.5411.6389.8350.0307.3
150°1356.0900.8689.8571.1497.6449.1419.5381.0345.3
Run VMG1565.81040.2796.5659.5566.8498.3450.8397.8360.2
Selected Courses
Windward / Leeward1364.7929.9735.4637.7578.8537.3508.4476.0459.5
All purpose1000.1698.1566.5502.3466.2442.0424.9401.3385.5
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward603.30.9945
All purpose482.81.2427
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.9551
Downwind "popa"0.9524
70% up, 30% down "Ilhabela"0.9543
30% up, 70% down "Ilhabela-inverso"0.9532
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Predominantly Upwind506.41.1849
Predominantly Downwind513.41.1686
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP503.21.1923 Predom. Rc High381.71.5719 5B SF Bay L/M664.00.9036 TriNum AP Low632.30.9489 Predom. Dn Low838.90.7152 5B SF Bay Med563.61.0646 TriNum AP Med480.61.2485 Predom. Dn L/M596.81.0054 5B SF Bay M/H500.31.1993 TriNum AP High420.31.4275 Predom. Dn Med493.11.2167 5B SF Bay High469.51.2778 TriNum W/L Low876.10.6849 Predom. Dn M/H425.91.4087 5B AP Low718.90.8346 TriNum W/L Med601.10.9981 Predom. Dn High389.11.5421 5B AP L/M548.41.0940 TriNum W/L Hig503.51.1917 ChiMac Up Low639.30.9385 5B AP Med473.01.2684 Predom. Upwind527.01.1386 ChiMac Up Med576.21.0413 5B AP M/H427.31.4043 Predom. Reaching481.51.2460 ChiMac Up High502.11.1950 5B AP High402.71.4901 Predom. Downwind541.11.1088 ChiMac Off Low708.30.8471 5B W/L Low990.00.6061 Predom. Up Low729.50.8225 ChiMac Off Med613.70.9777 5B W/L L/M706.50.8493 Predom. Up L/M553.21.0846 ChiMac Off High501.81.1957 5B W/L Med588.81.0190 Predom. Up Med490.61.2229 ChiMac AP Low668.00.8983 5B W/L M/H513.81.1678 Predom. Up M/H456.31.3150 ChiMac AP Med590.71.0158 5B W/L High478.81.2532 Predom. Up High439.21.3661 ChiMac AP High499.31.2017 W/L 60-40 Low965.80.6212 Predom. Rc Low687.50.8727 BayMac Cove Island778.80.7704 W/L 60-40 L/M697.70.8599 Predom. Rc L/M514.91.1654 BayMac Shore767.80.7814 W/L 60-40 Med590.51.0160 Predom. Rc Med447.01.3423 Harvest Moon424.71.4127 W/L 60-40 M/H524.61.1437 Predom. Rc M/H405.61.4792 5B SF Bay Low811.30.7395 W/L 60-40 High494.41.2135      SA/DSPL Up31.34SA/DSPL Dn31.34
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance530.3
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating530.31.1315
FinRating, kevyt tuuli977.81.0227
FinRating, kova tuuli404.71.2354
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance1.1315
Triple Number Coastal/Long Distance Low0.9489
Triple Number Coastal/Long Distance Medium1.2486
Triple Number Coastal/Long Distance High1.4275
Triple Number Windward/Leeward Low0.7206
Triple Number Windward/Leeward Medium0.9981
Triple Number Windward/Leeward High1.1917
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
For information
General Purpose Handicap (GPH)544.6
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Saronikos S All_Purpose535.51.1204
Saronikos S Upwind573.91.0455
Saronikos S Downwind501.71.1960
Saronikos N All_Purpose535.51.1204
Saronikos N Upwind597.31.0046
Saronikos N Downwind558.81.0736
Saronikos SW All_Purpose541.21.1087
Saronikos SW Upwind587.21.0219
Saronikos SW Downwind510.21.1761
Saronikos NE All_Purpose601.50.9975
Saronikos NE Upwind562.61.0664
Saronikos NE Downwind635.10.9447
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose503.21.1923
5-Band All-Purpose Low776.60.7725
5-Band All-Purpose L/M571.31.0502
5-Band All-Purpose Med489.71.2254
5-Band All-Purpose M/H439.51.3652
5-Band All-Purpose High413.01.4527
Single Number Predominant Upwind504.11.1902
Single Number Predominant Reaching461.41.3003
Single Number Predominant Downwind515.01.1650
5-Band 50-50 Windward/Leeward Low990.00.6061
5-Band 50-50 Windward/Leeward L/M706.50.8493
5-Band 50-50 Windward/Leeward Med588.81.0190
5-Band 50-50 Windward/Leeward M/H513.81.1678
5-Band 50-50 Windward/Leeward High478.81.2532
5-Band 60-40 Windward/Leeward Low965.80.6212
5-Band 60-40 Windward/Leeward L/M697.70.8599
5-Band 60-40 Windward/Leeward Med590.51.0160
5-Band 60-40 Windward/Leeward M/H524.61.1437
5-Band 60-40 Windward/Leeward High494.41.2135
Triple Number 50-50 Windward/Leeward Low876.10.6849
Triple Number 50-50 Windward/Leeward Med601.20.9980
Triple Number 50-50 Windward/Leeward High503.51.1917
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward604.40.9928
Triple Number 60-40 Windward/Leeward Low857.40.6998
Triple Number 60-40 Windward/Leeward Med601.50.9975
Triple Number 60-40 Windward/Leeward High515.61.1636
Triple Number All-Purpose Low693.50.8652
Triple Number All-Purpose Med498.01.2048
Triple Number All-Purpose High432.01.3888
Triple Number Predominant Upwind Low667.40.8991
Triple Number Predominant Upwind Med499.21.2018
Triple Number Predominant Upwind High453.51.3230
Triple Number Predominant Reaching Low620.60.9668
Triple Number Predominant Reaching Med460.91.3019
Triple Number Predominant Reaching High391.81.5312
Triple Number Predominant Downwind Low738.10.8129
Triple Number Predominant Downwind Med508.21.1806
Triple Number Predominant Downwind High410.61.4613
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low632.3
Triple Number Coastal/Long Distance Medium480.5
Triple Number Coastal/Long Distance High420.3
Triple Number Windward/Leeward Low832.6
Triple Number Windward/Leeward Medium601.1
Triple Number Windward/Leeward High503.5
Predominantly Upwind506.4
Predominantly Downwind513.4
Predominantly Reaching477.8
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.9489
Triple Number Coastal/Long Distance Medium1.2486
Triple Number Coastal/Long Distance High1.4275
Triple Number Windward/Leeward Low0.7206
Triple Number Windward/Leeward Medium0.9981
Triple Number Windward/Leeward High1.1917
Coastal/Long Distance1.1315
Predominantly Upwind1.1849
Predominantly Downwind1.1686
For information
General Purpose Handicap (GPH)544.6
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.2427
Distanseseilas Trippeltall svak vind0.9489
Distanseseilas Trippeltall mellomvind1.2486
Distanseseilas Trippeltall sterk vind1.4275
Pølsebane Trippeltall svak vind0.7206
Pølsebane Trippeltall mellomvind0.9981
Pølsebane Trippeltall sterk vind1.1917
Motvind Singeltall1.1849
Medvind Singeltall1.1686
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Coastal/Long Distance530.31.1315
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind506.41.1849
Predominantly Downwind513.41.1686
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore464.51.2918
Cape Doctor Coastal390.31.5374
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.9489
Triple Number Coastal/Long Distance Medium1.2486
Triple Number Coastal/Long Distance High1.4275
Triple Number Windward/Leeward Low0.7206
Triple Number Windward/Leeward Medium0.9981
Triple Number Windward/Leeward High1.1917
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low0.9489
Triple Number Coastal/Long Distance Medium1.2486
Triple Number Coastal/Long Distance High1.4275
Triple Number Windward/Leeward Low0.7206
Triple Number Windward/Leeward Medium0.9981
Triple Number Windward/Leeward High1.1917
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Predominantly Upwind506.41.1849
Predominantly Downwind513.41.1686
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance530.31.1315
Triple Number Coastal/Long Distance Low632.30.9489
Triple Number Coastal/Long Distance Medium480.51.2486
Triple Number Coastal/Long Distance High420.31.4275
Triple Number Windward/Leeward Low832.60.7206
Triple Number Windward/Leeward Medium601.10.9981
Triple Number Windward/Leeward High503.51.1917
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1384.8940.9692.6571.3499.3459.6429.9384.4365.6
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP503.21.1923 Predom. Dn High389.11.5421 5B AP M/H427.31.4043 TriNum AP Low632.30.9489 Predom. Rc Low687.50.8727 5B AP High402.71.4901 TriNum AP Med480.61.2485 Predom. Rc L/M514.91.1654 5B SF Bay Low811.30.7395 TriNum AP High420.31.4275 Predom. Rc Med447.01.3423 5B SF Bay L/M664.00.9036 TriNum W/L Low876.10.6849 Predom. Rc M/H405.61.4792 5B SF Bay Med563.61.0646 TriNum W/L Med601.10.9981 Predom. Rc High381.71.5719 5B SF Bay M/H500.31.1993 TriNum W/L Hig503.51.1917 5B W/L Low990.00.6061 5B SF Bay High469.51.2778 Predom. Upwind527.01.1386 5B W/L L/M706.50.8493 ChiMac Up Low639.30.9385 Predom. Reaching481.51.2460 5B W/L Med588.81.0190 ChiMac Up Med576.21.0413 Predom. Downwind541.11.1088 5B W/L M/H513.81.1678 ChiMac Up High502.11.1950 Predom. Up Low729.50.8225 5B W/L High478.81.2532 ChiMac Off Low708.30.8471 Predom. Up L/M553.21.0846 W/L 60-40 Low965.80.6212 ChiMac Off Med613.70.9777 Predom. Up Med490.61.2229 W/L 60-40 L/M697.70.8599 ChiMac Off High501.81.1957 Predom. Up M/H456.31.3150 W/L 60-40 Med590.51.0160 ChiMac AP Low668.00.8983 Predom. Up High439.21.3661 W/L 60-40 M/H524.61.1437 ChiMac AP Med590.71.0158 Predom. Dn Low838.90.7152 W/L 60-40 High494.41.2135 ChiMac AP High499.31.2017 Predom. Dn L/M596.81.0054 5B AP Low718.90.8346 BayMac Cove Island778.80.7704 Predom. Dn Med493.11.2167 5B AP L/M548.41.0940 BayMac Shore767.80.7814 Predom. Dn M/H425.91.4087 5B AP Med473.01.2684 Harvest Moon424.71.4127      SA/DSPL Up31.34SA/DSPL Dn31.34
ORC Ref  04620004ATD Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub 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 L13.448LSM013.051Accomod. length15.431Sink (kg/mm) 34.01
VCGD-0.113VCGM-0.069 RM Rated (kg·m) 407.2Limit of positive stability(°) 116.2 Stability Index 117.6 BLR index 0.0000Default crew weight1,006 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  04620004ATD Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Non Spin/HSFClub 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
NON MANUAL POWER CONTROLS (NMP)
SheetsYesMainsail cunninghamNoJib trackNoSpinnaker retrieverNoBoomvangNoHeadsail cunninghamNoTack lineNoOuthaulNoMain travellerNoHalyardsYes
ORC Ref  04620004ATD Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org