[C38] Propeller issue follow up

[Max Soto]

Hi Charles,

This prop seems to be awsome, do you have their web page???
This is a fixed prop right??

Thanks


Max Soto
C38 #198 ESTANCIA
Puntarenas, Costa Rica

>From: Charles Finn <charles at finn.ws>
>Reply-To: Catalina 38 Listserve <listserve at catalina38.org>
>To: Catalina 38 Listserve <listserve at catalina38.org>
>Subject: [C38] Propeller issue follow up
>Date: Mon, 12 Jun 2006 11:03:06 -0400
>
>Based upon our discussions a few months back, I purchased the Campbell
>Sailor prop  (15 x 9 three blade).  I have the Universal 5424 and have
>only been able to obtain 5-6 knots at 2400+ rpm.  I had a two-blade
>fixed prop.  In addition, I had awful "prop walk" and the boat would
>"thrum" at higher rpms that was wearing over any long motoring.
>
>I talked with the Norm Ross at West by North Enterprises and he made
>three promises:
>1. The boat will go faster at reduced rpm and will not load the diesel.
>2. The "thrum" is due to the two-blade prop as it is completely covered
>by the keel vortex, so it is essentially grabbing more water when it is
>outside the keel shadow and then relieved when within.
>3. Prop walk would be significantly reduced.
>
>Well, he was right on all three promises!  I now get about 6.5 knots at
>2000 rpm.  The engine is a lot quieter and the thrum is gone.  I still
>have prop walk, but it is not nearly as bad.  The prop looks very
>different from the Michigan Wheel design.   My last test of course will
>be how the drag will affect sailing, but I suspect I won't seem much
>(the weather in my area has been absolutely awful for the last 6-7 weeks).
>
>Charles Finn
>Mighty Quinn,  #114
>Lake Champlain
>
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