Goolwa Radio Yachting Group

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Goolwa RC Yachting

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South Australian Radio Yachting Association

Link to ARYA web site
Australian Radio Yachting Association  ARYA link


International Radio Sailing Association Web site

Modifications to Shrouds on the Phantom Yacht

Rudders Chain Plates Mast fitting for shrouds forestay Mainsheet fairlead Water proofing the hatch Improving Ballast Replacing Shrouds 'B' rig sails Radio Setup Clew/Tack Adjustment Improved sheeting system Gooseneck repair

 

Replacing Shrouds

The twisted cord used for the shrouds poses some problems.  The cords tends to untwist under tension and causes tangles around the bowsies used to tension the cord.  The cord also stretches under load which does allow gust shock load to be absorbed but also makes it difficult to keep the mast vertical.  Anyway the self-righting forces are not great so heeling absorbs the gust shock loads readily.

Much better to use a cord with no (or little) stretch.  Dyneema as used by fishermen or kite enthusiasts is the preferred cord.  This material is braided and has no tendency to twist under load.  Its stretch under load is also very small.  As there is little or no stretch in the cord making sure it is tight with no slack can be a problem with a simple bowsie with a 2:1 purchase around the chain plate fitting.  A much better idea is to terminate the shroud 10-15 cm above deck height with a loop or better still a small brass or stainless ring and use another length of cord looped through this to make a 3:1 purchase.

Cord can be obtained from fishing supplies, kite shop or the two RC Yachting suppliers on the links page

Ben has a significant supply of cord he is willing to share.

Wire and special adjustable turnbuckles would represent an alternative method of creating shrouds.  Wire fishing trace or special wire from the RC suppliers would suit.  The suppliers also have turnbuckles or you could be adventurous and make them yourself.

 

page last edited on 27/10/2011