Sam,
         The original prop was a Michigan Wheel fixed 2 blade, and there was no 
remarkable change in vibration either way when the Gori was installed. It might 
have been better, prop mass is more central to the shaft, but it would take 
some sort of measurement instrument to tell for certain. I have read, and it 
makes perfect sense, that all else being equal a 3 blade is less prone to 
vibration, so that is why I was looking. I don't think that I get appreciable 
vibration from the prop anyway, and whatever there may be is totally swamped 
out by the one cylinder diesel. (Yanmar YSB12) I did do a careful engine to 
prop shaft alignment once, which when wrong will cause vibration problems, and 
I should do it again sometime in mid to late season when the various hull 
bending stresses have settled down. It is a task best done on a cool day and 
when in a very patient frame of mind. 

I am sure that there must be someone who has done it, but I know of no one who 
actually has a 3 blade feathering or folding prop on a boat as small as ours. 
Makes it hard to weigh the advantage of such a costly upgrade. 

Steve Thomas
C&C27 MKIII

-----Original Message-----
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com]On Behalf Of 
sam.c.sal...@gmail.com
Sent: Tuesday, October 22, 2013 1:44 AM
To: cnc-list@cnc-list.com
Subject: Re: Stus-List Folding/feathering Props


Steve,
...and anyone else - how do you find the 2 blade and vibration? I note you had 
a concern; was the concern justified or does the 2 blade run OK? Anyone have 
any experience with 2 blade and 3 blade vibration differences?

If anyone is interested, I’ve had a quote back from Max Prop already:
Current prop is: 12” x 8” RH 3 Blade
Recommendations are:
12” x 10” 2 blade - $1500
12” x 9” 3 blade - $2400

sam :-)
C&C 26  Liquorice
Ghost Lake  Alberta

From: Steve Thomas
Sent: ‎October‎ ‎21‎, ‎2013 ‎6‎:‎18‎ ‎AM
To: cnc-list@cnc-list.com
Subject: Re: Stus-List Folding/feathering Props


Sam, 
         I found a used geared Gori for my 27 and it works fine in forward and 
reverse. I had hoped to find a 3 blade folder of some kind to minimise 
vibration but when I checked the manufacturers specifications there were none 
available in a small enough diameter. That was a few years ago so it might not 
be true now.  

Steve Thomas
C&C27 MKIII

 -----Original Message-----
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com]On Behalf Of 
sam.c.sal...@gmail.com
Sent: Monday, October 21, 2013 4:02 AM
To: cnc-list@cnc-list.com
Subject: Re: Stus-List Folding/feathering Props


Good experiences; thanks for sharing.
Looks like two or three endorsements for the Max Prop; about the same against 
the Martec; one for the Flexofold; ...and a Gori replacing a Martec!
couple of questions:
How big a deal is the maintenance on the Max Prop?
Is it just a matter of greasing the prop every couple of years or is there 
more? - I pull the boat out of the lake every October; so it wouldn't be too 
much of a concern.
I still have the old prop on the shaft. Am I correct in assuming that the taper 
is a standard SAE? I'm going to need to know for sure before I order. (Probably 
safer to remove the prop and measure for peace of mind!)
Any more information / experiences / insights welcome.  


sam
C&C 26. Liquorice 
Ghost Lake Alberta 




‎‎On 10/20/2013 7:21 PM, Tim Goodyear wrote: 
  Sam, I have a two blade Flex I Fold, which goes nicely forwards and backwards 
and replaced a 2 blade non-geared Martec that went sideways in reverse and 
sometimes went forward if the blades opened together  (even after rebuilding).  
The two do not compare.


  Tim
  Mojito
  C&C 35-3
  Branford, CT

  On Oct 20, 2013, at 7:10 PM, David Donnelly <da...@gnuattitude.ca> wrote:


    Sam I also have the 2 blade Martec and a 26. I have not found poor 
performance in reverse but I don't do it a bunch either. Can push just fine 
going forward.


    David




    Sent from Samsung Mobile



    -------- Original message --------
    From: Harry Hallgring <hhallgr...@icloud.com> 
    Date: 10-20-2013 5:00 PM (GMT-07:00) 
    To: cnc-list@cnc-list.com 
    Subject: Re: Stus-List Folding/feathering Props 



    Sam,
    I have a two blade folding Martec prop that goes 7 kts forward and four kts 
directly sideways in reverse. Going with a Gori this winter. 

    Harry 


    Sent from my iPhone 6Beta

    On Oct 19, 2013, at 20:21, Sam Salter <sam.c.sal...@gmail.com> wrote:


      This winters project is a folding/feathering prop.
      I've just sent off inquiries to:
      Flexofold
      Max Prop
      Slipstream

      Anyone got any comments/observations/likes/dislikes.
      Any experience good or bad with any type of folding/feathering prop would 
be useful.
      Any other manufacturers recommended.

      Now is your chance to get in on a real sailing topic - folding/feathering 
props OR rum!

      sam :-)
      C&C 26  Liquorice
      Ghost Lake  Alberta


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