Andy
gosh. so much to talk about..
Julian.
You are quite right, I understand the Cornish Shrimper and Adventure can also use the aero luff spar to fly a genoa - the manufacturer mentioned that 'other' makers apart from Swallow Boats have been investigating the use of the spar - so am assuming that is Cornish Crabbers.
Their website mentions using it in strong winds. I agree that my main concern is it 'blowing out' in a strong wind with disastrous results. I did read that they employ some kind of special 'clamp' to prevent this? I will want reassurances about this and then decide whether or not to have it after I've had a trial sail - in strong winds if I can. I certainly will let you know.
Rob.
I discussed that idea with Matt, and am quite taken on it.
I think (probably wrongly) that this is not a new idea and is called a 'slutter rig' - this would mean an additional forestay though, but doesn't the 23 have a 'main' forestay to hold the mast up and an and an inner stay for the jib anyway?
Would there be enough room between the two stays for the furling gear and sail?.. Do you envisage using it as purely a downwind/reaching sail, if so to gybe would it mean furling it up, then letting it go again after gybing?
Not sure what you mean by the Spitfire design? I thought a spitfire sail was some kind of storm jib?
Gosh this is getting complicated!
The Spitfire I referred to is an 18 foot dinghy made by North Quay Marine(
http://www.northquaymarine.co.uk/resources/Spitfire-18-Specification.pdf)
The BC23 has a fore stay that is shackled to the hounds on the mast and to the point of the forepeak (heaven knwos what the technical term for that is), so it's very strong. However, when the jib is hoisted (eg all the time you are sailing), it's the wire in the leading edge of the jib that takes the strain and the forestay sags quite a bit.
I think the BC needs a larger, light weight sail for running down wind (and in fact for sailing when the wind is abaft the beam).
Nick and I were wondering if you could replace the forestay with the "non twisting" piece of rope that runs up the inside of assymetric used by the Spitfire (quote 'The optional asymmetric head sail adds a new dimension to the sailing experience. It is operated on a “topdown”
furler so is easily deployed and recovered from within
the cockpit.'). The furling mechanism for this is operated by a continuous loop with the furling drum at the bottom of the non twisting rope. It looks to me as if there would be room for this arrangement as well as the existing roller furling of the jib in the bow of the BC 23.
I discussed it with Matt earlier this week. His concern is that it will weaken the rig, because there no longer is the steel cable of the forestay and he probably has a point, which is why his preferred option is the aero luff.
I'll be very interested in the results of the tests at "the shed" (or even in the estuary!).
Gosh, how can we transfer all this rig discussion to a new thread - anyone know?
Rob J