[Rhodes22-list] Measured Hull Speed

[Michael Meltzer]

by extreme over kill :-)

My standard tankage is two 6.6 gallon tanks that I run dry before switching. plus a 3 gallon baby tank with it's own fuelline setup,
have "eaten" fuel lines :-)
I use .7 gal/hour(IIRC the number from the manual for max usages)

The standard tank will give a range around 130 miles and the reserve 30 miles, if I think I even getting close to these number I
have a second pair of 6.6 tanks that will double the range.
We both know these are worstcase number and the real ones are about 1/3 better. I like having the reserve to hold outside an
anchorage and it gives me "options" if a gas dock is closed or a storm is brewing. It seems the wind is always in the wrong place if
I need to get somewhere :-)

MJM


PS. for steves next line, "floating oil barge", for bill is know it is overkill, I like insurance.


----- Original Message ----- 
From: "Roger Pihlaja" <cen09402 at centurytel.net>
To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
Sent: Wednesday, July 23, 2003 11:38 AM
Subject: Re: [Rhodes22-list] Measured Hull Speed


> Michael is correct.  Please forgive me, I was careless with my nomenclature.
> I meant that 5-1/4 knots is about the most economic motoring speed for
> Dynamic Equilibrium.
>
> How do you people plan your trips if you don't know what fuel mileage to
> expect?  This is pretty fundamental stuff.
>
> Roger Pihlaja
> S/V Dynamic Equilibrium
>
> ----- Original Message -----
> From: "Michael Meltzer" <mjm at michaelmeltzer.com>
> To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> Sent: Wednesday, July 23, 2003 11:20 AM
> Subject: Re: [Rhodes22-list] Measured Hull Speed
>
>
> > it a case where everyone is right here,
> >
> > watch the 2 terms, HULL speed and engine cursing speed,
> >
> > hull speed is about 6.25 on a rhodes22.
> > the engine cursing speed might be less, first off it takes about 6hp to
> push a rhodes22 at hullspeed, but by lowing the speed a
> > little (like 5) knots the power req drop to around 3-4 hp. I have the
> caluatilied number somewhere but need to dig them up.
> >
> > MJM
> >
> > ----- Original Message -----
> > From: "Steve" <rhodes2282 at yahoo.com>
> > To: "The Rhodes 22 mail list" <rhodes22-list at rhodes22.org>
> > Sent: Wednesday, July 23, 2003 11:11 AM
> > Subject: Re: [Rhodes22-list] Measured Hull Speed
> >
> >
> > > Michael/Roger
> > > Didn't we calculate hull speed for the R22 at around
> > > 5.9 kt some time ago.  Who still has that formula?  I
> > > know that when I out sailing; for me to the my boat
> > > plaining; I uselly need to hit 6 kt to get a good
> > > plain going.
> > > Steve
> > >
> > >
> > > --- Ronald Lipton <lipton at sprynet.com> wrote:
> > > > Hull speed is not an absolute limit - it is just the
> > > > point where the power
> > > > vs speed curve becomes very steep.   To do a proper
> > > > job one should
> > > > plot speed vs engine RPMs and see where there is a
> > > > significant change
> > > > in the slope (I have neve seen cush a plot myself).
> > > >
> > > > Ron
> > > > ----- Original Message -----
> > > > From: "Christine Allison" <sailnut at asan.com>
> > > > To: "The Rhodes 22 mail list"
> > > > <rhodes22-list at rhodes22.org>
> > > > Sent: Wednesday, July 23, 2003 8:52 AM
> > > > Subject: Re: [Rhodes22-list] Measured Hull Speed
> > > >
> > > >
> > > > > In my opinion the boats hull speed is about 5.2
> > > > knots or a little better.
> > > > I
> > > > > make it a point to run my GPS to aid in sail trim
> > > > when the boat is
> > > > cranking
> > > > > along.
> > > > >
> > > > >  I recognize that the GPS provides speed over the
> > > > ground however after a
> > > > lot
> > > > > of observations and taking the state of the
> > > > current into consideration I
> > > > > think a Rhodes would be hard pressed to maintain
> > > > more then 5.2 knots and
> > > > in
> > > > > actuality probably 4.7 to 4.9 knots (sustained)
> > > > would represent excellent
> > > > > sailing.
> > > > >
> > > > > Richard Smith
> > > > >
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