[C320-list] Folding props

Fri Jan 20 06:48:53 PST 2006

My stock 3 blade is 15x9

  John (Sojourn645)

Jeff Hare <hare at cadence.com> wrote:
  Len,

I think 15x10 is a 3-blade pitch. A two blade prop would be pitched
more than 10" I think, but I'm not an expert. 

-Jeff

-----Original Message-----
From: C320-List-bounces at catalina320.com
[mailto:C320-List-bounces at catalina320.com] On Behalf Of belairlk at aim.com
Sent: Wednesday, January 04, 2006 11:19 AM
To: C320-List at catalina320.com
Subject: Re: [C320-list] Folding props

Mike- What size Gori 2-blade are you considering? Gori recommends
16-1/6 x 11, but C320 owners report this is too large, suggest 15 x 10.

Len
Aqua5 #1070 

-----Original Message-----
From: Lachance, Michael B (ISD, IT) 
To: C320-List at catalina320.com
Sent: Wed, 4 Jan 2006 06:56:27 -0500
Subject: Re: [C320-list] Folding props

Well said. Essentially same the story in eastern Connecticut, esp in
light air. 

Thanks for the feedback so far I'm leaning toward the Gori Mike
--------------------------
Sent from my BlackBerry Wireless Handheld (www.BlackBerry.net)

-----Original Message-----
From: C320-List-bounces at catalina320.com
To: Rod Boer; C320-List
Sent: Tue Jan 03 22:39:29 2006
Subject: Re: [C320-list] Folding props

Depends on the PHRF committee, but most likely, YES.

On Lake Michigan, the boat is rated as if it has a folding / feathering
prop, and you get a credit of 3 sec / mi for a two blade fixed prop, and
another 3 sec / mi ( a total of 6 sec / mi) for a 3 (or more) blade
fixed prop. These credits aren't nearly enough to compensate for the
drag of these props under normal conditions. If the wind is honking,
you could drag a big bucket behind the boat without affecting your
speed, but at less than hull speed, the 3 blade prop is a sea anchor
(especially down wind) while the drag from the 2 blade is much less
apparent.

It may have been coincidental, but the top three boats in the '02 C-30
Nationals had 2 blade Martec folding props, the next three boats had two
blade fixed props, and the last three boats had three blade fixed props.
Even adjusting the elapsed time for the respective handicaps didn't
affect the standings in any of the races.

Steve
Alchemist C-320 #909
Alchemist C-30T #4764 ('02 National Champ)

--- Rod Boer wrote:

> Mike,
> 
> Don't they make an adjustment to your rating when you change the prop?

> If they do, you feel that you come out ahead after the change?
> 
> Rod Boer
> Odyssey, #688
> 
> ----- Original Message -----
> From: "Lachance, Michael B (ISD, IT)" 
> To: 
> Sent: Saturday, December 31, 2005 1:12 PM
> Subject: Re: [C320-list] Folding props
> 
> 
> PHRF racing
> --------------------------
> Sent from my BlackBerry Wireless Handheld (www.BlackBerry.net)
> 
> 
> -----Original Message-----
> From: C320-List-bounces at catalina320.com
> To: C320-List at catalina320.com
> Sent: Sat Dec 31 12:47:19 2005
> Subject: Re: [C320-list] Folding props
> 
> Why have you decided to changeout your fixed 3-blade for folding 
> prop????
> 
> Len
> Aqua5 #1070
> 
> -----Original Message-----
> From: Lachance, Michael B (ISD, IT) 
> To: C320-List 
> Sent: Sat, 31 Dec 2005 12:13:37 -0500
> Subject: [C320-list] Folding props
> 
> 
> I've decided to replace my fixed 3 blade prop. Given the projected 
> expenditure some research is needed. I plan to review available 
> literature, talk to other sailors and list postings to make an 
> informed choice. The props I will examine include: Autoprop, MaxProp, 
> Gori, and Flex-o-fold.
> 
> My question: are these four the major candidates or am I missing one?
> 
> Also, I'm thinking about documenting my research for the website or an

> article for Mainsheet. So if anyone has information they wish to 
> share, anecdotal or otherwise, and at the risk of starting a really 
> long thread (but hey it's snowing outside), please reply to this post.
> 
> Thanks
> 
> Mike LaChance
> Seychelle, #141
> Noank, CT
> 
> 
>
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John Van Vessem
Sojourn 645
Vallejo Yacht Club