[C320-list] Autoprop Feedback/dripless shaft seal

[Welch, Myron D]

Dick,

Thanks for the reply. I like that solution, but where and how did you make the connection? If you have any pictures or drawings, please send them to my email address. Thanks. 

Myron Welch
Wind Instrument #238
Iowa City, Iowa
Grace Memorial Harbor
Elk Rapids, Michigan 

Sent from my iPad

On May 16, 2013, at 7:04 PM, "Dick Walker" <dickwalker at att.net> wrote:

> It was inserted into the exhaust water and flows overboard. 
> 
> 
> Cheers
> 
> Dick Walker
> 740 Olive Ave.
> Coronado ,CA 92118
> 619.435.8986
> 
> 
> 
> On May 16, 2013, at 13:53, "Welch, Myron D" <myron-welch at uiowa.edu> wrote:
> 
>> Dick,
>> 
>> I too updated my dripless shaft seal to the newer vented model ( they sent it to me for free!) last year. Where did you route the vent tube? The PYI suggested placement was not good. Thanks. 
>> 
>> Myron Welch
>> Wind Instrument #238
>> Iowa City, Iowa
>> Grace Memorial Harbor
>> Elk Rapids, Michigan 
>> 
>> Sent from my iPad
>> 
>> On May 16, 2013, at 11:15 AM, "Dick Walker" <dickwalker at att.net> wrote:
>> 
>>> When I ordered my year 2000 C-320 I made the following changes TO THE DRIVE
>>> TRAIN.  SS PROP SHAFT, FTI DRIPLESS shaft seal and the AUTOPROP.
>>> 
>>> They really helped the performance and maintenance.
>>> 
>>> With the autoprop at about 2700 RPM on the Yanmar engine I get hull speed
>>> +/- 7.1 kits. I did not have to perform any modifications to the strut.  I
>>> use about .6 gallons per hour at 2700 RPM.
>>> 
>>> After 8 years I changed the dripless shaft seal to the new model that does
>>> not need to be burped.
>>> 
>>> Here is my in water test
>>> RPM    2.61 Gear    2.21 Gear
>>> 1000    4    2.7
>>> 1200    4.7    3.5
>>> 1400    5.45    4.3
>>> 1600    6    5
>>> 1800    6.4    5.6
>>> 2000    6.6    6
>>> 2200    6.9    6.3
>>> 2400    7.2    6.6
>>> 2600    7.3    6.7
>>> 2800    7.35    6.85
>>> 3000    7.35    7.1
>>> 3200    7.35    7.2
>>> 3400    7.35    7.3
>>> 3600 ft    7.35    7.35
>>> 
>>> Cheers and give me a call if you have any questions
>>> 
>>> 
>>> Dick Walker
>>> WindWalkerII #687
>>> 619.435.8986
>>> 
>>> 
>>> 
>>> -----Original Message-----
>>> From: c320-list-bounces at lists.catalina320.com
>>> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Brian &
>>> Christine Borchers
>>> Sent: Thursday, May 16, 2013 8:49 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
>>>