[MHml] Cat vs. Tri

Rob Denney proa at iinet.net.au
Sat Nov 4 02:28:58 EST 2006


G'day,

So, define an open rule for us.

regards,

Rob
----- Original Message ----- 
From: "Capt. Len" <trikini23 at trikini.com>
To: "Informed discussion of multihull issues" <multihulls at steamradio.com>
Sent: Friday, November 03, 2006 9:55 PM
Subject: Re: [MHml] Cat vs. Tri


> See what I said.  To many special interest people putting forward to
> ever permit a true open rule.
>
> If was really open, then I think you would get  answers to all these
> special interests not limit it by defining one area.
>
> Even sail area is a tough one, with wing masts, wing sails ( soft and
> hard) and kites all defining area differently.
>
> And we haven't even touched on courses yet .
>
> Was so nice back in 1960's when no one knew anything and we were open to
> anything.
>
> len
>
>
> Rob Denney wrote:
>
> > G'day,
> >
> > Interesting, but it forces a sloop rig which may  type form the boat.
> > For example, an unstayed mast with no jib does not need a forestay,
> > nor the extra beefing up that the entire hull needs to take that
> > forestay.  Also, on a proa, sheeting a jib is a tad tricky (no deck to
> > leeward) unless you use a ballestron boom, which is good, but not
> > ideal for a race oriented boat.
> >
> > Plus, I would like to know a lot more about rig optimisation than is
> > currently evident.    Is it just sail area/righting moment
> > considerations, or is one definitely superior.  What is the ideal
> > aspect ratio and plan form if righting moment is allowed to be very
large?
> >
> > regards,
> >
> > Rob
> >
> >
> >
> >     ----- Original Message -----
> >     *From:* Jesse Deupree <mailto:jdeupree at maine.rr.com>
> >     *To:* Informed discussion of multihull issues
> >     <mailto:multihulls at steamradio.com>
> >     *Sent:* Friday, November 03, 2006 7:46 PM
> >     *Subject:* Re: [MHml] Cat vs. Tri
> >
> >
> >     On Nov 3, 2006, at 12:01 AM, Rob Denney wrote:
> >
> >>     G'day,
> >>
> >>     The J24 rig would be a challenge due to the stays, although not
> >>     an insurmountable one, and if that was the rule, I would
> >>     certainly design and build a boat to race under it.   However,  I
> >>     (as both a proa fan and an interested person) would prefer the
> >>     rule to stipulate just the sail area, including spars.  This
> >>     would help answer the sloop vs una rig question as well as the
> >>     hull size and shape questions.  Perhaps a maximum of 20% of the
> >>     total to be the spars to keep it relevant, cheap and easy to
> >>     handle.
> >
> >
> >     Fair enough- rule is modified to just require sails fit inside
> >     triangles made by class rule forestay and backstay, and certainly
> >     shunting would be fair. This particular rule is designed to test
> >     boat design, hence the one-design rig and sails. A Rule that just
> >     said xxx sq. feet of sail tests sail design and boat design
> >
> >     The idea of a J24 rig is just to pick something easy and obvious
> >     and possibly cheap. The idea of a $5,000 claim is to keep someone
> >     from trying too hard (show up and win with something too fancy
> >     costing $20,000 and someone will buy it. Show up with a winner
> >     that cost you less than $5,000 and someone might buy it- your
choice.)
> >
> >     Jesse Deupree
> >     F-27 ION
> >     Portland Maine
> >
>
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> -- 
> Live Long and Prosper
> Capt. Len Susman, retired
> trikini23 at trikini.com
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