[C320-list] Gori two blade problems

Wed Oct 17 10:40:02 PDT 2007

Scott,

This is the one I bought last November:
 http://h1071671.hobbyshopnow.com/products/description.asp?prod=HAN156

 Rider's Hobby shop is local to our area so I walked in and bought one. But
 it looks like they do online business as well from the above link.

 I was glad to confirm that my engine tach was spot on when I measured with
 this new toy.

  -bill

----- Original Message ----
From: T. Scott Thompson <sthompson at toad.net>
To: C320-List <c320-list at catalina320.com>
Cc: C320-List <c320-list at catalina320.com>
Sent: Wednesday, October 17, 2007 1:32:36 PM
Subject: [C320-list] Gori two blade problems

The person I spoke to at the Annapolis Sailboat show was Geoff Prior.   The
booth said "Gori" as well as AB Marine.  I just sent an email to him
asking for the field test data sheet that I'm supposed to fill out to
document the problem.  I'll keep you posted about what I learn.  I took
careful notes shortly after launching the boat with the new prop and
documented engine rpms vs. GPS speed (no current, no wind) with a clean
bottom.

By the way, I'd like to purchase an optical tach to verify that my boat
tach is accurate, since I'm sure they will question that.  I have not
found any RC airplane stores locally, which has been a recommended source
on this list.  Does anyone have a recommendation for a specific model and
a place to buy it online?

> I suspect nothing, my prop is new this year and to hear AB it is all
> my problem. Shaft too long, engine not up to par, bent shaft yada
> yaday ada, Oh just pull your boat for $300 3 or 4 times to sort out
> there problem. If it did 7.1 kts with a fixed 3 blade and dirty
> bottom but now only 6.7 at 2500 max rpm on a clean bottom  not the
> 3000 it use to get and any more is just smoke, it is over pitched.
> The increase in speed and no vibration when sailing at hull speed is
> great. The Hurth transmission on the old Perkins says to let in spin
> in neutral not put it in gear as most models say. Let us know if they
> have found there math error yet. This is a cruiser not a raced boat
> and weighs accordingly.
>
> Pat  #130
>
> Gori 2 blade
>
> At 07:07 AM 10/15/2007, you wrote:
>>Scott,
>>
>>I assume you spoke with Steve Armitage from AB? I have also spoken
>>with him about my inability to get up to full RPM underway. I have
>>done the field test that he suggests and will now speak with him
>>about what they will do. My prop is 3 years old.....
>>
>>Will let you know what they come back with...
>>
>>Regards,
>>
>>Jon Vez
>>
>>-------------- Original message --------------
>>From: "T. Scott Thompson" <sthompson at toad.net>
>>
>> > The alignment problem goes away if you get a geared folder such as the
>> > Gori two-blade, since the one on the bottom can't hang down without
>> > lifting the upper one up. However, be warned that AB Marine -- the US
>> > distributor for Gori -- has a history of selling overpitched props to
>> > 320 owners. If you get one, be sure to test it immediately upon launch
>> > and insist on changing it out immediately if you can't get the engine
>> up
>> > to full RPMs under way with a clean bottom and prop.
>> >
>> > I spoke to the AB Marine rep about this at the Annapolis Boat show
>> last
>> > week. He wants me to run a whole battery of tests after which it isn't
>> > clear what kind of service I can get to solve this problem with my two
>> > year old prop.
>> >
>> >
>> >
>> > Kirk McCullough wrote:
>> > > Folding is good too, as long as you align the shaft with a 2
>> blade so you
>> > > don't have one blade hanging down when under sail. A feathering
>> prop won't
>> > > have this problem, particularly a Kiwi where each blade feathers
>> > > independently, and in-line with the water flow, not in-line
>> with the shaft.
>> > >
>> > > Kirk
>> > >
>> > > -----Original Message-----
>> > > From: c320-list-bounces at catalina320.com
>> > > [mailto:c320-list-bounces at catalina320.com] On Behalf Of
>> > > Orlando.Duran at AveryDennison.com
>> > > Sent: 13 October 2007 18:37
>> > > To: Catalina 320 List
>> > > Subject: Re: [C320-list] Early Christmas Present
>> > >
>> > > I completely agree with you...
>> > >
>> > > cl 3
>> > > ----------------------------------
>> > > Regards,
>> > > OD
>> > >
>> > > Sent from my BlackBerry Wireless Handheld
>> > >
>> > >
>> > > ----- Original Message -----
>> > > From: Stord
>> > > Sent: 10/13/2007 06:02 PM
>> > > To: c320-list at catalina320.org
>> > > Subject: Re: [C320-list] Early Christmas Present
>> > >
>> > >
>> > > "Go for feathering over folding"
>> > >
>> > > I'm not sure I'd agree with this. I have an autostream feathering
>> prop.
>> > > While I like the performance, I think the folding might be
>> slightly better
>> > > under sail. However, IMO, the feathering will do better backing the
>> boat
>> > > into
>> > > the slip.
>> > > Steve
>> > > s/v Joy 756
>> > >
>> > >
>> > >
>> > >
>> > > In a message dated 10/13/2007 4:13:37 P.M. Eastern Daylight Time,
>> > > kirk.mccullough at telus.net writes:
>> > >
>> > > Go for feathering over folding
>> > >
>> > >
>> > >
>> > >
>> > >
>> > >
>> > > ************************************** See what's new at
>> http://www.aol.com
>> > >
>> > > - -----------------------------------------------------------------
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>> > > this in error, please contact the sender and delete the
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>> > >
>> > >
>> > >
>> >
>
> Pat Moriarty
> PSI Urethanes Inc
> PH: 800-888-5156  Fax: 512-837-8733
> Please visit our web site at
> www.psiurethanes.com
>
>
>
>

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