As I have noted before, hull cleanliness is a more significant factor with multihulls compared with monohulls. A fouled monohull with deep keel will still point high enough to tack if fouled. Older style IOR deep keeler would almost turn in their own length so do not need much momentum to complete a tack.
A cat that has sails and appendages that enables it to point higher than 40 degrees and still sail should tack OK without motoring and with jib self tacking. However it does not take much fouling to really knock pointing ability.
It is a useful exercise to look at the track of successive upwind tacks on a GPS. If they are within 90 degrees without current assist then that is good for a multihull.
On 31 Oct 2018, at 1:54 am, ryanonthebeach@gmail.com [harryproa] <harryproa@yahoogroups.com.au> wrote:Guity here
I would often motor through a tack with my old heavenly twins and she had an extreme amount of rocker.It was possible to tack without the motor of course, especially when backwarding the jib, but not easy in light airI assume this is because of lack of rig efficiency, weight, keels etc.?
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Posted by: Rick Willoughby <rickwill@bigpond.net.au>
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