Ovington and Composite Craft Spinnaker Sheaves…..

After racing last Sunday, we were thinking about the way that spinnaker sheave blocks have been evolving. In the Ovi Mk IX it was a bit agricultural – led across decks, outside tanks and around extra sheaves …. but in the Mk X they followed the Dingwall and Composite Craft boats in having sheets travelling in tubes through the tanks. In the Ovi the sheet emerges at the back of the cockpit, but in the Composite Craft Dingwall design it comes out further forward. These two photos are what it looks like at the back of the boat…

This is the Ovington idea, It looks a bit frumpy somehow, but those micro blocks are very light and easily replaced.  And my goodness, they run exceptionally freely.  So looks aside, I’m pretty impressed actually. You can also get at it easily if anything goes wrong….!!

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The next photo is the Composite Craft Fifteen sailed by Charles.  You would have to say that the frumpiness isn’t there!  I can’t identify the fitting for the moment, but I guess it is some kind of very free running ball bearing  block. Access for replacement looks easy enough too. What about threading the sheets through? Hmmm….

It would be totally unlike Charles to have a fitting back there that is heavier than the Ovington solution, but with the metal casing I suppose it just might be. Maybe the Ovington has more weight in the fibreglass to build up the housing…..

So …. a big  “hmmmm”  on this one…..