Jib foot infront or behind the shoot?

20/07/2016 13:52:56
What's the verdict from the pros?

25/07/2016 19:29:15
broz
Ian Holt boat, Diamond Smiles (named after a lyric from a Boom Town Rats song), had the jib attached in front of the shoot, it all so had a self tacking jib,hydrolic shrouds, and shrouds on trackes'.. When I bought the boat it all so had self launching poles, as did my first Merlin, Impulse....

27/07/2016 11:56:12
Stuart Bates MR3615
In general the Jib tack is behind the chute, however Jon Turner has built his new boats with the jib tack on the bow in front of the chute.  I don't think that it makes too much of a difference, you will just have to ensure that the jib sheet is at the correct angle for the sail.

27/07/2016 15:53:42
Barnsie
The advantage of the jib being further forward is that the overlap where the slot is, is reduced and therefore less likely to choke in breeze. If you get it right, there is a benefit to be had. However, this needs to be offset by the fact that you are causing a restriction around the chute with the jib when hoisting and lowering the kite.
 
For the definitive answer on the advantages read the following in this link  http://hyperphysics.phy-astr.gsu.edu/hbase/pber.html
 
You will also need to make sure the jib clue is correct and jib car position in the right place. Those with fully adjustable in all directions would be fine. but those with fixed in one direction may have a problem
 
Enjoy ;)

27/07/2016 16:13:31
Chris Rathbone
 Developing this theme, is anyone currently putting a high rig on modern boats?

27/07/2016 16:33:34
broz
I'm not certain,but I think the old Diamond Smiles jib was high aspect.Another good reason to control the slot.

28/07/2016 12:04:00
Barnsie
We considered it with the new boat (3763) to reduce drag across the sails, but the leverage due to extra height would not work for us. Would have gone nicely with the new style hatchet board, but felt we'd need to be 23+ stone to carry it and the area is slightly less subject to how you cut the sails ;) Surprised it has not been tried by one of the front teams (3764)

28/07/2016 21:32:59
Stuart Bates MR3615
In terms of a Tall rig on a new boat Chris Haworth did this on 3663, which he has since sold.  Seemed to go ok.

28/07/2016 22:25:50
David Lee
It's standard practice on Scorpions to have the jib tack sited in front of the chute but, having sailed one last season, I found it a right pain compared to standard Merlin system.  There seemed to be a lot more friction when hoisting, especially when on port tack because of having to pull the spinnaker around the forestay.  Also, combined with the stuff luff system, we seemed to regularly find innovative ways of rigging the spinnaker wrong!  Whilst there might be slight advantage to having the wider slot, I feel it's not enough to justify the handling hassles.

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