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Home >> Technical >> A Few More Questions
05/12/2011 11:18:01

Dale Giles
Posts: 0
Hello Folks

A few questions for you all!

Number One - I have put a new luff wire on the boat, it's made out of Dyform wire, not the standard stainless steel wire. So will the numbers on the rig tension still match up? If not any idea how I measure the rig tension? 

Number Two - The reason for putting a new luff wire on the boat was because the Jib was touching the deck too much. I have followed P&B Jib setup guide, and now have my Jib 4.5 Inches of the deck. How much of my Jib should be touching the deck, when on mast rake of 22 8"?

Number Three - Because the Jib has moved further up the mast the spinnaker on the drop is now getting caught around the bottom of the Jib, does anyone else have this problem? If so how do I stop it happening. Do I blame the crew? 

Any help would be greatly received



06/12/2011 13:20:40

Nick Hurst
Posts: 0
Dale,

In an attempt to answer your questions:

#1: No idea, sorry. Maybe a question to the supplier, because I think it'll depend on the 'deformability' of the material under load. It may resist the distorsion a bit more than 'ordinary' wire.

#2: Tests done on the 'end plate' effect seem to show that there isn't one. Jib tack should be 75-100mm off the deck & that's it.

#3: Of course its the crew's fault! Isn't everything? More seriously, it sounds as if the halyard is being released before the foot of the kite is properly gathered (oops - that'll make it your fault :-).

Hope this helps.

Nick.



06/12/2011 15:07:32

Dale Giles
Posts: 0
Thanks Nick. 

What do you mean by "end plate"?

As for Kite drop yep that's my fault. I let halyard off when the crew is getting the pole in. So how does everyone else drop their kite? 

Do I need to get the crew to gather up the kite both bottom corners then let halyard off and into the bag? My crew is a beginner and has only been sailing for the last few months, he doing pretty well. 

 



06/12/2011 19:21:55

Gavin Tillson
Posts: 0
Do not EVER, EVER blame the crew. That is all.



07/12/2011 08:19:14

Nick Hurst
Posts: 0
I think the 'end plate' effect is - in theory - that which prevents the low and high pressure areas on the two sides of a sail from being 'exposed' to one another & therefore mixing so the efficiency is reduced. Reportedly, tests done in the French 470 (pah) fleet show that whether the foot of the jib is on the deck (preventing the 'bleed thru') or not makes little or no difference.

Re the kite drop, your crew should bring the pole in, then gather the foot so the sail is effectively a long sausage then call for the halyard release. I (as incompetent driver) uncleat & hold the tension on the halyard until the call then just let go.

Hope this helps.

Nick.



08/12/2011 16:32:56

Dale Giles
Posts: 0
OK Got it, will whip the crew up this weekend in packing the kite. Thanks 



08/12/2011 23:22:34

Becky Priest
Posts: 0
Re. kite dropping - I was told last Sunday NEVER to put both the bottom corners of the kite in the bag at the same time as this is what causes it to form an hourglass when they twist round each other.

Apparently you should put one of the corners right into the bottom of the bag first and then work your way simultaneously along the foot and leech (actually I think it's the luff as it's the edge the pole was attached to) until all is safely in the bag.

But then that helpful comment came from a crew who tried trapezing off my back on Sunday and pushed both of us, and the never washed by me burgee of Bossy Three, into the cold waters of Staunton Harold reservoir!

Unfortunately for me, I feel he may be correct this time...... but only this time!
I admit to being more used to the type of kites that are pulled in middle first by a piece of rope.

But I do agree, NEVER, NEVER, NEVER let the halyard off too soon, you will only ever once 'sail through' the spinnaker!



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