UpdatefromtheNationalScienceFoundation

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NSFWirePoolManager

• SyntheticRope• .681PowerOpticCable

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SyntheticRopeUpdate

*  9/16”diameterPlasmaHICO12strandrope*  TwolengthspurchasedbytheWirePool:12,000mand10,000m*  12,000mlengthontheR/VNeilArmstrong*  10,000mlengthwentontheWestCoastWinchPool

DynaconTractionwinchforuseduringacoringcruiseontheR/VThomasThompsonforElisabethSikes7Novemberto19December2018

SyntheticRope

*  1stCore,pistoncore:1544mmaxtension9500lbs.

*  2ndCore,alsopiston:1250m,maxtension20,000lbs.withslippageonthetractionheadsbuteventualpullout

TT1811Coring

TensionRecordfromCore#2

5000lbs.

15,000lbs.

20,000lbs.

10,000lbs.

*  Paper-likematerialpeeledoffthetractionheadgrooves,nosignofitontheropeitself.*  Duetotheslippage,1300mcutback.*  Continuedcoringcompleting38gravitycoresand1additionalpistoncore.*  Maxtensionfollowingcore#2was6900lbs.andmaxropeoutwas3825m.

CoringContinued

*  8700mpiece(10,000m-1,300m)*  NominalBreakingLoad:37,900lbs.*  TestedBreakingLoad(New):43,350lbs.*  TBLafter38coringops:45,750lbs.

*  1300mpiecedamagedduetoslippage*  NominalBreakingLoad:37,900lbs.*  TestedBreakingLoad(New):43,350lbs.*  TBL:85%ofnewTBL,97%ofNBL36,790lbs.

BreakTestResults

*  “AllpartiesinvolvedthinkthisstuffhasaLOTofpromiseforfuturecoringuse.”-DaleHubbard(OSU)

*  NothavingtheaddedweightofthewirealongwiththesensitivityoftheDynacontensiondisplay,theycoulddeterminequiteaccuratelywhetherthecorehadpenetratedorfellover.

*  Therewerenootherslippageeventsfollowingtheonethatoccurredduringthesecondcore.

*  LorenzoMcCoy(SIO)removedtheLebusshellandwirewheeledthetractionwinchgroovesinpreparationforusewithPlasmaHICO.

PostCruiseComments

ANew.681PowerOpticCable

Manufacturer:FibronpreviouslyCortlandStrengthMember:

Twolayersteelwirearmor41589lbsminimumbreakingstrength

(3)5mm^2strandedplaincopperpowerconductors(1)GellfilledSStubew/6singlemodeopticalfibersConfigurationmaybelesssusceptibletoopticalattenuationobservedondirectdrivewinches.

.681PowerOpticCable

Title7

Cores after Water Block Process

Once the Water BlockProcess is complete, The core will be Wrap in Copper Tape

*  KeigwincoringcruiseinSept2019onR/VNeilArmstrongisplanningonusingthePlasmaHICOsyntheticrope*  TakedeliveryinJuneofthe.681PowerOpticcablefrom

Fibron*  Fibronprovidinga1000msampleforelectricalandoptical

attenuationtesting*  TrialsyntheticcabletobepurchasedandCBOStested

monitoringtheconductorperformanceandcomparedto.322testedsimultaneouslyundersimilarconditions

LookingAhead

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