[C320-list] Hull speed

[Stan]

They're kind of like a skiff with a 12' bulb keel attached.  Looks like a
fun ride though.

Stan
"Our Little Amusement" #744


On 4/20/06, Jeffrey Hare <catalina at thehares.com> wrote:
>
> Those modern racing boats like the Open series aren't true displacement
> hulls are they?
>
> -Jeff
>
> -----Original Message-----
> From: Stan [mailto:ola7442000 at gmail.com]
> Sent: Thursday, April 20, 2006 12:02 PM
> To: C320-List
> Subject: Re: [C320-list] Hull speed
>
> Hi Everyone.
>
> The formula for hull speed [SQ RT of WL*1.34] is very basic and was
> developed a long time before the modern sloops such as the 320 were even
> imagined.  This formula will get you close but a number of other hull
> factors, especially the wide beam carried aft will result in a higher hull
> speed.  Extreme examples of this are the open 50s and 60s.  You can
> completely throw the formula out on those boats.
>
> That said, the actual hull speed for a 320 based on observation of the bow
> wave in pretty flat water with 12-14 Kts., is somewhere around 7.2 - 7.5.
> It was hard to nail down the actual hull speed because of the GPS time
> lag.
> As the bow wave went beyond the stern the boat speed would plumment but
> the
> GPS would lag making an exact reading impossible.  One of those perfect
> days
> on a beam reach.
>
> The fastest I have sailed my 320 was in the middle of Lake Michigan on the
> South end.  I was sailing in the high 8s to low 9s and peaking at 10.3Kts.
> (GPS) with the Asym. up and 2-4 footers.  The bow wave was noticably
> beyond
> the stern of the boat, indicating surfing. I was singlehandling at the
> time,
> making it was a bit hair raising.  But what a ride.
>
> Stan
> "Our Little Amusement" #744
>
>
> On 4/20/06, Steve Magennis <magenns at yahoo.com> wrote:
> >
> > Hull speed on our C-320 is 7.09 knots.  All that means is that it takes
> > a whole lot of energy (or surfing) to get our boats going much faster
> > than that (has to do with wave mechanics).  I know one other owner who
> > has had his up to 14 knots, surfing with the spinnaker up in the
> > Chicago -Mackinac race.  Said he was on the edge of disaster.
> >
> > Under power with a clean bottom and flat water, I have had the
> > Alchemist up to 8 knots (GPS and speedo), but I burned up a whole lot
> > of dinosaurs doing it.
> >
> > Be happy with the speed you achieved.  It's entirely believable and a
> > whole lot of fun.
> >
> > Steve
> > Alchemist C#909
> >
> > --- "Lachance, Michael B (ISD, IT)" <MLaChance at thehartford.com> wrote:
> >
> > > 1st sail of year in good wind with new Gori 2 blade folding prop.
> > > Slack water, blowing 20-30kt, 1-2 ft seas, full main, 110 jib on
> > > close reach, speedo consistently reading high 7's with peak at 8.2kt
> > > confirmed with GPS. I thought hull speed was 6.3kt. What gives? Btw
> > > I'm loving the new prop
> > > Mike Lachance
> > > Seychelle, 141
> > > Noank, Ct
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --------------------------
> > > Sent from my BlackBerry Wireless Handheld (www.BlackBerry.net)
> > >
> > >
> > > -----Original Message-----
> > > From: C320-List-bounces at catalina320.com
> > > To: C-320 Catalina
> > > Sent: Wed Apr 19 19:27:57 2006
> > > Subject: [C320-list] GFO report
> > >
> > > I replaced the packing with GFO and am very pleased, no drips and no
> > > heat in the shaft.  Pretty cool having a dripless packing gland for
> > > only $15.00.
> > > Herb Creech
> > > Cloud Chaser #606
> > >
> > > !!- _______________________________________
> > > !!- C320-List at catalina320.com mailing list
> > > !!- Archives Here: http://www.catalina320.com/list/archives
> > > !!- Change Subscription Here: http://www.catalina320.com/list/change
> > > !!- Subscribe Here: http://www.catalina320.com/list/join
> > >
> > >
> > >
> >
> *************************************************************************
> > > This communication, including attachments, is
> > > for the exclusive use of addressee and may contain proprietary,
> > > confidential and/or privileged information.  If you are not the
> > > intended
> > > recipient, any use, copying, disclosure, dissemination or
> > > distribution is
> > > strictly prohibited.  If you are not the intended recipient, please
> > > notify
> > > the sender immediately by return e-mail, delete this communication
> > > and
> > > destroy all copies.
> > >
> >
> *************************************************************************
> > >
> > > !!- _______________________________________
> > > !!- C320-List at catalina320.com mailing list
> > > !!- Archives Here: http://www.catalina320.com/list/archives
> > > !!- Change Subscription Here: http://www.catalina320.com/list/change
> > > !!- Subscribe Here: http://www.catalina320.com/list/join
> > >
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam?  Yahoo! Mail has the best spam protection around
> > http://mail.yahoo.com
> >
> > !!- _______________________________________
> > !!- C320-List at catalina320.com mailing list
> > !!- Archives Here: http://www.catalina320.com/list/archives
> > !!- Change Subscription Here: http://www.catalina320.com/list/change
> > !!- Subscribe Here: http://www.catalina320.com/list/join
> >
>
>
>
> --
> Stan
> C320 "Our Little Amusement" #744
> __/)__/)__/)__/)__
> !!- _______________________________________
> !!- C320-List at catalina320.com mailing list
> !!- Archives Here: http://www.catalina320.com/list/archives
> !!- Change Subscription Here: http://www.catalina320.com/list/change
> !!- Subscribe Here: http://www.catalina320.com/list/join
>
>
>
> !!- _______________________________________
> !!- C320-List at catalina320.com mailing list
> !!- Archives Here: http://www.catalina320.com/list/archives
> !!- Change Subscription Here: http://www.catalina320.com/list/change
> !!- Subscribe Here: http://www.catalina320.com/list/join
>



--
Stan
C320 "Our Little Amusement" #744
__/)__/)__/)__/)__