[C320-list] folding props again

Mon Apr 3 11:07:52 PDT 2006

Orlando,
Did you use the Varifold people in Virginia? They are the best people to 
work with and stand behind their product 120%. I hope you bought theirs as 
they will be there for you all the way.
Joe Revak
----- Original Message ----- 
From: <Orlando.Duran at AveryDennison.com>
To: "C320-List" <C320-List at catalina320.com>
Sent: Monday, April 03, 2006 1:51 PM
Subject: Re: [C320-list] folding props again

Scott,

Wouldn't be best for you to give all of the info to the prop mfg's and let
them tell you what would work best on your particular boat? I just went
thru this exercise with both Flex-O-Fold and Varifold for my new boat, it
really helps in speaking to the mfg instead of just getting the same thing
someone else has....

cuba libre 2

             Scott Thompson
             <sthompson at toad.
             net>                                                      To
             Sent by:                 C320-List
             C320-List-bounce         <C320-List at catalina320.com>
             s at catalina320.or                                          cc
             g
                                                                  Subject
                                      Re: [C320-list] folding props again
             04/03/2006 10:10
             AM

              Please respond
                    to
                C320-List
             <C320-List at catal
               ina320.org>

All:  If you look way, way down near the bottom of this message you will
see my original question, namely what size/pitch I should order for the
Martec or Gori two-blade folders, given I have the Yanmar 3GM30F and
2.21:1 reduction.  So far, despite all of the replies, no one has
offered an answer.  Can no one provide this info?

Scott Thompson

Darrell wrote:
> I have the 3 blade flexifold and appreciate the extra torque when I need
it.
> I also backs the boat up with little to no walk, Darrell
> ----- Original Message -----
> From: "Walter burnett" <selkie2003 at yahoo.com>
> To: "C320-List" <C320-List at catalina320.com>
> Sent: Thursday, March 30, 2006 6:04 PM
> Subject: Re: [C320-list] folding props again
>
>
> The difference in drag under sail between a two and three blade folding
prop
> is insignificant (folded is folded). A three blade does give more torque

> (bite) for a given size and it typically will run with a little less
> vibration because the weight is more evenly distributed around the
center of
> rotation.  Some resonance vibration at certain RPMs seems to be endemic
to
> all folding props, probably because of moving parts. As Dick suggests,
the
> three blade folders work better if you do a lot of motoring or encounter

> heavy seas.
>
>   BTW, I'm very happy with a 3 blade Gori.
>
>   Walter Burnett
>   Selkie #887
>
> "Richard A. Walker" <dickwalker at att.net> wrote:
>   On the left coast we motor relatively allot. Up to Catalina which is
about
> 78 miles from Coronado we are both into the wind and into a .5 to 1 kt
> current. So motoring is the thing. The Autoprop gets WindWalker II 7.1
kts
> at 2600 rpm which is our normal transit mode. In 61/2 years we have
about
> 450 hours on the engine.
>
> WE do not use it much for our day sailing, into and out of the slip but
on
> the long trips it is well used.
>
> Cheers,
>
> Dick Walker
> C-320 (687) WindWalker II
> 740 Olive Ave.
> Coronado, CA 92118-2136
>
>
>
> 619.435.8986-----Original Message-----
> From: C320-List-bounces at catalina320.com
> [mailto:C320-List-bounces at catalina320.com] On Behalf Of Peter Clancy
> Sent: Thursday, March 30, 2006 4:04 PM
> To: C320-List
> Subject: Re: [C320-list] folding props again
>
> Good question. I have the Gori 2-blade folder. Price is a factor and
you'd
> probably have a little more drag under sail with the 3-blade prop (a
racing
> issue). I have a 10 year old boat with only 360 hours on the engine. So,
we
> sail 80-90% of the time. Folks who motor more often, particularly in
windy
> and choppy conditions, could probably make a case for the 3-blade having
a
> better "bite" and possibly driving the boat better thru such conditions
> although I've never had a problem with my 2-blade folder.
>
> Peter Clancy
> AROBAN C320 #222
> Miami, FL
> ----- Original Message -----
> From: belairlk at aim.com
> To: C320-List at catalina320.com
> Sent: Thursday, March 30, 2006 6:52 PM
> Subject: Re: [C320-list] folding props again
>
>
> What is the reason most of this thread prefers the Gori 2-blade instead
of
> the Gori 3-blade---other than price.
>
> Len
> Aqua5 #1070
>
> -----Original Message-----
> From: Pat Moriarty
> To: C320-List
> Sent: Thu, 30 Mar 2006 11:25:51 -0600
> Subject: Re: [C320-list] folding props again
>
>
> So I have the same combo and was thinking about the Gori 2 blade
> also. How have you liked it so far? RPM vs speed and reverse etc. Did
> you have the 3 blade fixed before?
>
> Pat
> SEXUALHEELING #130
>
> At 11:16 AM 3/30/2006, you wrote:
>> I hope I'm not violating any usage clause with this little endorsement
>> but I just acquired and installed a Gori 2 blade from AB Marine in
>> Newport for my 94' hull #141 with a Perkins. They beat every price I
>> could find on the net and more importantly were very knowledgable and
>> helpful during prop selection and sizing. The fella I dealt with was
>> Geoff Prior [geoff at ab-marine.com]
>> Mike LaChance
>> Seychelle, #141
>>
>> -----Original Message-----
>> From:
> C320-List-bounces at catalina320.com
>> [mailto:C320-List-bounces at catalina320.com] On Behalf Of Scott Thompson
>> Sent: Thursday, March 30, 2006 11:50 AM
>> To: C320-List
>> Subject: [C320-list] folding props again
>>
>> Sorry to beat a dead horse, but I can't seem to find the answers in the
>> older threads on this. Surprise is 1999 wing keel model, hull 653. She
>> has the Yanmar 3GM30F, continuous HP rating 24.1HP at 3400 RPM. Her
>> gearbox has 2.21:1 reduction in forward gear.
>>
>> For cost reasons and to get minimal drag I'm only looking at the Gori
>> and Martec 2 blade folders. What pitch and diameter of these props
>> would be recommended for my boat? Am I correct that the shaft is 1
>> inch, standard US taper?
>>
>> Who has the best deals on these props? Any reason to prefer Gori to
>> Martec or vice versa? I've read good things about both.
>>
>>
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