Club 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°36.7°36.3°37.1°
Beat VMG3.094.395.345.856.106.256.366.506.45
52°4.826.647.828.338.568.708.808.938.96
60°5.186.978.098.588.798.949.059.219.27
75°5.467.218.268.799.099.299.449.679.80
90°5.317.068.178.789.209.549.8010.1910.49
110°5.217.228.479.079.449.7710.0910.7211.32
120°5.027.038.409.129.6710.1110.5311.4012.27
135°4.486.387.848.759.4010.0610.8412.6014.00
150°3.705.346.697.818.659.259.8511.4914.06
Run VMG3.214.625.796.777.528.068.549.9512.18
Gybe Angles139.0°141.3°144.4°148.9°152.8°153.9°151.4°146.2°145.4°
APH ToD:451.4CDL: 13.123APH ToT: 1.3292CertNo:ZAC176
BOAT
ClassLavranos 52DesignerLavranosBuilderOwnerAge date01/1988Series date01/1988Offset file1052L.OFFData fileRSA1027
HULL
Length Overall15.740Maximum Beam4.748Draft3.149Displacement10,950DLR4.9242IMS DivisionPerformanceDynamic Allowance0.010%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 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 408.0 Stability Index 117.8
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  04620004ATC Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club 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 VMG1164.5820.1674.4615.7590.5575.9565.6553.7558.0
52°746.6542.3460.5432.0420.7414.0409.3403.0401.7
60°695.2516.3445.0419.7409.4402.8397.9391.1388.4
75°659.7499.6435.8409.6395.8387.5381.3372.2367.3
90°677.8510.0440.4409.9391.2377.5367.3353.2343.1
110°690.6498.9425.2396.9381.4368.3356.6335.9318.2
120°717.4511.8428.4394.6372.5356.2342.0315.9293.4
135°804.3564.0458.9411.5383.1357.7332.0285.7257.1
150°972.4674.3538.4460.8416.4389.2365.4313.3256.1
Run VMG1122.8778.6621.7532.1478.4446.9421.5361.8295.7
Selected Courses
Windward / Leeward1143.7799.4648.1573.9534.5511.4493.5457.7426.8
All purpose867.0617.9512.2464.5439.2422.6409.0384.2365.2
Single Number Scoring Options
Course Time On
Distance 		Time On
Time
Windward / Leeward554.41.0822
All purpose451.41.3292
Custom scoring options for Australia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Custom scoring options for Austria
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Brazil
Scoring Option Time On
Time
Upwind "bolina"0.9554
Downwind "popa"1.1535
70% up, 30% down "Ilhabela"1.0073
30% up, 70% down "Ilhabela-inverso"1.0860
Custom scoring options for Bulgaria
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Predominantly Upwind488.21.2290
Predominantly Downwind454.31.3208
Custom scoring options for Canada
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP467.91.2824 Predom. Rc High361.41.6602 5B SF Bay L/M597.51.0041 TriNum AP Low565.01.0619 Predom. Dn Low680.20.8821 5B SF Bay Med523.31.1467 TriNum AP Med449.61.3345 Predom. Dn L/M509.41.1778 5B SF Bay M/H478.21.2548 TriNum AP High403.11.4885 Predom. Dn Med441.21.3600 5B SF Bay High446.61.3434 TriNum W/L Low758.30.7912 Predom. Dn M/H393.51.5248 5B AP Low625.30.9595 TriNum W/L Med551.31.0883 Predom. Dn High355.61.6872 5B AP L/M500.11.1997 TriNum W/L Hig484.61.2382 ChiMac Up Low606.30.9896 5B AP Med444.11.3509 Predom. Upwind507.51.1824 ChiMac Up Med551.01.0889 5B AP M/H409.61.4647 Predom. Reaching446.71.3432 ChiMac Up High485.51.2359 5B AP High385.21.5576 Predom. Downwind472.51.2700 ChiMac Off Low589.71.0175 5B W/L Low847.60.7079 Predom. Up Low685.10.8758 ChiMac Off Med524.01.1451 5B W/L L/M627.40.9563 Predom. Up L/M528.71.1348 ChiMac Off High443.71.3522 5B W/L Med543.21.1046 Predom. Up Med475.81.2610 ChiMac AP Low595.71.0072 5B W/L M/H493.91.2147 Predom. Up M/H446.51.3437 ChiMac AP Med536.01.1195 5B W/L High458.61.3084 Predom. Up High429.11.3983 ChiMac AP High463.81.2936 W/L 60-40 Low852.10.7042 Predom. Rc Low609.30.9848 BayMac Cove Island682.30.8793 W/L 60-40 L/M634.50.9456 Predom. Rc L/M472.01.2712 BayMac Shore677.30.8858 W/L 60-40 Med554.01.0831 Predom. Rc Med420.91.4255 Harvest Moon397.11.5108 W/L 60-40 M/H508.61.1796 Predom. Rc M/H386.11.5539 5B SF Bay Low715.60.8385 W/L 60-40 High478.21.2548      SA/DSPL Up31.34SA/DSPL Dn70.40
Custom scoring options for Cyprus
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Denmark
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Spain
Scoring Option Time On
Distance
Coastal/Long Distance489.9
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Estonia
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Custom scoring options for Finland
Scoring Option Time On
Distance 		Time On
Time
FinRating489.91.2247
FinRating, kevyt tuuli834.61.1982
FinRating, kova tuuli386.71.2931
Custom scoring options for France
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Custom scoring options for Germany
Scoring Option Time On
Time
Coastal/Long Distance1.2247
Triple Number Coastal/Long Distance Low1.0619
Triple Number Coastal/Long Distance Medium1.3347
Triple Number Coastal/Long Distance High1.4885
Triple Number Windward/Leeward Low0.8291
Triple Number Windward/Leeward Medium1.0883
Triple Number Windward/Leeward High1.2382
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
For information
General Purpose Handicap (GPH)503.5
Custom scoring options for Greece
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Saronikos S All_Purpose508.81.1793
Saronikos S Upwind573.91.0455
Saronikos S Downwind429.01.3986
Saronikos N All_Purpose508.81.1793
Saronikos N Upwind597.31.0044
Saronikos N Downwind468.81.2798
Saronikos SW All_Purpose509.51.1777
Saronikos SW Upwind587.31.0215
Saronikos SW Downwind432.71.3866
Saronikos NE All_Purpose551.21.0885
Saronikos NE Upwind562.81.0662
Saronikos NE Downwind522.41.1485
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Hungary
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Custom scoring options for Ireland
Scoring OptionTODTOT
Single Number All-Purpose467.91.2824
5-Band All-Purpose Low680.10.8822
5-Band All-Purpose L/M518.11.1580
5-Band All-Purpose Med458.01.3101
5-Band All-Purpose M/H419.91.4290
5-Band All-Purpose High392.71.5277
Single Number Predominant Upwind487.11.2318
Single Number Predominant Reaching431.01.3920
Single Number Predominant Downwind455.11.3185
5-Band 50-50 Windward/Leeward Low847.60.7079
5-Band 50-50 Windward/Leeward L/M627.40.9563
5-Band 50-50 Windward/Leeward Med543.21.1046
5-Band 50-50 Windward/Leeward M/H493.91.2147
5-Band 50-50 Windward/Leeward High458.61.3084
5-Band 60-40 Windward/Leeward Low852.10.7042
5-Band 60-40 Windward/Leeward L/M634.50.9456
5-Band 60-40 Windward/Leeward Med554.01.0831
5-Band 60-40 Windward/Leeward M/H508.61.1796
5-Band 60-40 Windward/Leeward High478.21.2548
Triple Number 50-50 Windward/Leeward Low758.30.7912
Triple Number 50-50 Windward/Leeward Med551.41.0882
Triple Number 50-50 Windward/Leeward High484.61.2382
Scoring OptionTODTOT
Single Number 60-40 Windward/Leeward565.21.0616
Triple Number 60-40 Windward/Leeward Low763.30.7861
Triple Number 60-40 Windward/Leeward Med561.51.0685
Triple Number 60-40 Windward/Leeward High500.41.1990
Triple Number All-Purpose Low613.60.9778
Triple Number All-Purpose Med463.91.2933
Triple Number All-Purpose High412.61.4542
Triple Number Predominant Upwind Low625.60.9591
Triple Number Predominant Upwind Med482.41.2437
Triple Number Predominant Upwind High446.71.3431
Triple Number Predominant Reaching Low556.11.0789
Triple Number Predominant Reaching Med433.21.3850
Triple Number Predominant Reaching High372.21.6120
Triple Number Predominant Downwind Low610.10.9834
Triple Number Predominant Downwind Med448.91.3366
Triple Number Predominant Downwind High375.31.5988
Custom scoring options for Israel
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Japan
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Korea
Scoring Option Time On
Distance
Triple Number Coastal/Long Distance Low565.0
Triple Number Coastal/Long Distance Medium449.5
Triple Number Coastal/Long Distance High403.1
Triple Number Windward/Leeward Low723.7
Triple Number Windward/Leeward Medium551.3
Triple Number Windward/Leeward High484.6
Predominantly Upwind488.2
Predominantly Downwind454.3
Predominantly Reaching436.8
Custom scoring options for Lithuania
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Netherlands
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.0619
Triple Number Coastal/Long Distance Medium1.3347
Triple Number Coastal/Long Distance High1.4885
Triple Number Windward/Leeward Low0.8291
Triple Number Windward/Leeward Medium1.0883
Triple Number Windward/Leeward High1.2382
Coastal/Long Distance1.2247
Predominantly Upwind1.2290
Predominantly Downwind1.3208
For information
General Purpose Handicap (GPH)503.5
Custom scoring options for Norway
Scoring Option Time On
Time
Distanseseilas Singeltall  (APH)1.3292
Distanseseilas Trippeltall svak vind1.0619
Distanseseilas Trippeltall mellomvind1.3347
Distanseseilas Trippeltall sterk vind1.4885
Pølsebane Trippeltall svak vind0.8291
Pølsebane Trippeltall mellomvind1.0883
Pølsebane Trippeltall sterk vind1.2382
Motvind Singeltall1.2290
Medvind Singeltall1.3208
Custom scoring options for Portugal
Scoring Option Time On
Distance 		Time On
Time
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Coastal/Long Distance489.91.2247
Custom scoring options for Russia
Scoring Option Time On
Distance 		Time On
Time
Predominantly Upwind488.21.2290
Predominantly Downwind454.31.3208
Custom scoring options for South Africa
Scoring Option Time On
Distance 		Time On
Time
Cape Doctor Inshore436.11.3758
Cape Doctor Coastal370.91.6177
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Custom scoring options for Slovenia
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.0619
Triple Number Coastal/Long Distance Medium1.3347
Triple Number Coastal/Long Distance High1.4885
Triple Number Windward/Leeward Low0.8291
Triple Number Windward/Leeward Medium1.0883
Triple Number Windward/Leeward High1.2382
Custom scoring options for Switzerland
Scoring Option Time On
Time
Triple Number Coastal/Long Distance Low1.0619
Triple Number Coastal/Long Distance Medium1.3347
Triple Number Coastal/Long Distance High1.4885
Triple Number Windward/Leeward Low0.8291
Triple Number Windward/Leeward Medium1.0883
Triple Number Windward/Leeward High1.2382
Custom scoring options for Sweden
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Predominantly Upwind488.21.2290
Predominantly Downwind454.31.3208
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for Ukraine
Scoring Option Time On
Distance 		Time On
Time
Coastal/Long Distance489.91.2247
Triple Number Coastal/Long Distance Low565.01.0619
Triple Number Coastal/Long Distance Medium449.51.3347
Triple Number Coastal/Long Distance High403.11.4885
Triple Number Windward/Leeward Low723.70.8291
Triple Number Windward/Leeward Medium551.31.0883
Triple Number Windward/Leeward High484.61.2382
Performance Curve4 kt 6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt 24 kt
Coastal/Long Distance1141.6797.3611.1520.1467.8438.2413.2370.3350.0
Custom scoring options for United States of America
Scoring OptionTODTOT Scoring OptionTODTOT Scoring OptionTODTOT Single Number AP467.91.2824 Predom. Dn High355.61.6872 5B AP M/H409.61.4647 TriNum AP Low565.01.0619 Predom. Rc Low609.30.9848 5B AP High385.21.5576 TriNum AP Med449.61.3345 Predom. Rc L/M472.01.2712 5B SF Bay Low715.60.8385 TriNum AP High403.11.4885 Predom. Rc Med420.91.4255 5B SF Bay L/M597.51.0041 TriNum W/L Low758.30.7912 Predom. Rc M/H386.11.5539 5B SF Bay Med523.31.1467 TriNum W/L Med551.31.0883 Predom. Rc High361.41.6602 5B SF Bay M/H478.21.2548 TriNum W/L Hig484.61.2382 5B W/L Low847.60.7079 5B SF Bay High446.61.3434 Predom. Upwind507.51.1824 5B W/L L/M627.40.9563 ChiMac Up Low606.30.9896 Predom. Reaching446.71.3432 5B W/L Med543.21.1046 ChiMac Up Med551.01.0889 Predom. Downwind472.51.2700 5B W/L M/H493.91.2147 ChiMac Up High485.51.2359 Predom. Up Low685.10.8758 5B W/L High458.61.3084 ChiMac Off Low589.71.0175 Predom. Up L/M528.71.1348 W/L 60-40 Low852.10.7042 ChiMac Off Med524.01.1451 Predom. Up Med475.81.2610 W/L 60-40 L/M634.50.9456 ChiMac Off High443.71.3522 Predom. Up M/H446.51.3437 W/L 60-40 Med554.01.0831 ChiMac AP Low595.71.0072 Predom. Up High429.11.3983 W/L 60-40 M/H508.61.1796 ChiMac AP Med536.01.1195 Predom. Dn Low680.20.8821 W/L 60-40 High478.21.2548 ChiMac AP High463.81.2936 Predom. Dn L/M509.41.1778 5B AP Low625.30.9595 BayMac Cove Island682.30.8793 Predom. Dn Med441.21.3600 5B AP L/M500.11.1997 BayMac Shore677.30.8858 Predom. Dn M/H393.51.5248 5B AP Med444.11.3509 Harvest Moon397.11.5108      SA/DSPL Up31.34SA/DSPL Dn70.40
ORC Ref  04620004ATC Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club 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 L13.456LSM013.051Accomod. length15.431Sink (kg/mm) 34.01
VCGD-0.118VCGM-0.074 RM Rated (kg·m) 408.0Limit of positive stability(°) 116.4 Stability Index 117.8 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  04620004ATC Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org
Club 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  04620004ATC Issued on 08/02/2026 Valid until 31/01/2027
VPP ver: 2026 1.00 | © ORC | www.orc.org