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:[email protected]]On Behalf Of
[email protected]
Sent: Tuesday, October 22, 2013 1:44 AM
To: [email protected]
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: [email protected]
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:[email protected]]On Behalf Of
[email protected]
Sent: Monday, October 21, 2013 4:02 AM
To: [email protected]
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 <[email protected]> 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 <[email protected]>
Date: 10-20-2013 5:00 PM (GMT-07:00)
To: [email protected]
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 <[email protected]> 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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