[C320-list] AtoProp Feedback

[resloat]

Warren-Agree.  One inch shaft on my boat = 1.5 inches spacing. Thanks for 
reminding me how I got the the 1.5 figure in my recent post.
Bob Sloat
----- Original Message ----- 
From: "Warren Updike" <wupdike at hotmail.com>
To: <C320-List at Catalina320.com>
Sent: Thursday, May 16, 2013 5:41 PM
Subject: Re: [C320-list] AtoProp Feedback


> Professional wisdom says the space between the rear face of the prop and 
> the
> strut should not exceed 1.5 x shaft diameter.
>
> -----Original Message-----
> From: Brian & Christine Borchers [mailto:slaintec320 at gmail.com]
> Sent: Thursday, May 16, 2013 11:49 AM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] AtoProp Feedback
>
> Andrew,
>
> Thanks for the info regarding the shaft extender.  Is the extender a 
> plate,
> similar to the coupler? How much extension is needed and what does it look
> like?  Also, do you know the amount of shaft that is needed following the
> strut to accommodate the propeller.  Again, thanks for the feedback.
>
> Brian Borchers
> Sent from my iPhone
>
> On May 16, 2013, at 8:34 AM, Andrew Santangelo <andrew_santangelo at mac.com>
> wrote:
>
>> Brian,
>>
>> I have had an autoprop on my C320 for the last 15 years - it was my first
> "major" addition to Dawn Treader.
>>
>> I both cruise and race.  Cruise wise it works excellent in forward and
> reverse (no prop walk).  The performance under power and the fuel economy
> significantly improved.  If I recall, I hit hull speed at a lower RPM.
>>
>> Race wise it was one of several key improvements.  I have not raced in 
>> the
> last few years, but when we did we either placed or won.  When first 
> racing
> as newbs we were dead last always (and I mean last).  After adding the
> autoprop we moved to the middle of the fleet.  (Later additions include 
> fin
> keel, hydraulic backstay, racing sails, racing sheets and halyards, etc.).
>>
>> Installation requires a shaft extender.  I forget the name/brand of mine,
> but it goes between the prop shaft and the engine.  It also suppresses any
> added vibrations and isolates the prop shaft/prop from the engine (reduces
> rust?).  Without it, the prop will whack the strut, a definite no-no.
>>
>>
>> Andrew Santangelo
>>
>> C320 "Dawn Treader"
>> #333
>> San Francisco, CA
>>
>> J22 "Blitzkrieg"
>> Elephant Butte, New Mexico
>>
>>
>>
>> On May 16, 2013, at 3:36 AM, Brian Borchers wrote:
>>
>>>
>>> Hello,
>>>
>>> I am considering an Autoprop for our 320. I reviewed some photos  of
> "Nauti - Duck" on the C320 web site and it looked like the strut had a cut
> out, does anyone know if this was done to accommodate the propeller? 
> Those
> who have the Autoprop or have had an Autoprop, your feedback and 
> experience
> regarding the propeller is appreciated.
>>>
>>> Brian
>>
>
>
>