[C320-list] Normal Performance Limits?

[Irving Grunes]

Bruce,
Check the knotmeter manual re calibration.
It says something like this:
Find a smooth stretch of water with very little tide or wind influence and
then calibrate your  knotmeter with a "clean" log paddlewheel using the SOG
as your standard.
Then the difference between the knotmeter reading speed thru the water and
SOG will be the resultant of tide and wind influence

Irv Grunes
#851.



On Sun, Oct 5, 2008 at 10:44 AM, <bruceheyman at cox.net> wrote:

> Jack,
> Can't help you with the specific pluming problem.  We've had a few fresh
> water leaks but not that specific one.  The problem is usually fixed by
> taking apart the connection, cleaning everything up, replacing teflon tape
> or past and reassembling.
>
> On the speed it is strange that the difference is only when under power.
>  With the log installed in front of the keel there should be no prop effect.
>
> Bruce
> Somerset 671 SoCal
> Sent via BlackBerry by AT&T
>
> -----Original Message-----
> From: "Jack McDonough" <mcdonough5 at verizon.net>
>
> Date: Sat, 04 Oct 2008 10:22:27
> To: <C320-List at Catalina320.com>
> Subject: Re: [C320-list] Normal Performance Limits?
>
>
> Bert:
>
> I understand the analogy. But it seems to me that my knotmeter must be
> registering unrealistically low speeds when it always, and I mean always,
> shows one or two knots less than SOG.  And this also happens when running
> under power only. It seems doubtful to me that the difference is always
> current. Anyway, I consider this to be more a situation than a problem to
> be
> solved.
>
> The leaking fresh water connector under the head sink, on the other hand,
> is
> a problem.  I'm not getting any takers on that one. Apparently no one else
> has had the same experience.
>
> jack
> sure bet #947
>
>
>
> ----- Original Message -----
> From: <BAdams3491 at aol.com>
> To: <C320-List at Catalina320.com>
> Sent: Saturday, October 04, 2008 9:07 AM
> Subject: Re: [C320-list] Normal Performance Limits?
>
>
> > Jack,
> >
> > Using speed over ground is fine for determining when you'll get some
> > where.
> > However, it tells you nothing about  how your engine is  running as far
> as
> > speed is concerned.  If an airplane is flying at 200  knots, but  has a
> 50
> > knot
> > headwind, it's only going 150 knots over the  ground...same with a boat
> > only
> > the variables are wind, current, tide, etc.
> >
> > Bert
> > At Ease
> > #442
> >
> >
>
>