[Public-List] Public-List Digest, Vol 4511, Issue 1
Daniel Swords
danielswords at yahoo.com
Wed Jun 19 07:57:43 PDT 2024
The previous boat owner had switched to a fixed 3 blade prop. I hated it. It spun vigorously with my Yanmar in neutral and locked the gear shift/throttle lever in forward if the engine was used to stop the spinning (which Yanmar recommends against doing). I didn’t find any improvement in backing. I switched back to the original 2 blade prop. I have checked many times and my 2 blade prop (which doesn’t spin while sailing with the engine in neutral) is always parked in the vertical position, nicely protected by the keel deadwood and out of the slipstream. Daniel SwordsBayou Castine, Louisiana
Sent from Yahoo Mail for iPhone
On Wednesday, June 19, 2024, 9:39 AM, public-list-request at lists.alberg30.org wrote:
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======================================================
Today's Topics:
1. Re: Recommendations for replacement seacocks and thruhulls
(Wade Wall)
2. Best prop? (John Johnston)
3. Re: Best prop? (Pier-Andr? Bouchard St-Amant)
4. Re: Best prop? (John Johnston)
5. Re: Best prop? (Pier-Andre Bouchard St-Amant)
6. Re: Best prop? (Mike Lehman)
----------------------------------------------------------------------
Message: 1
Date: Tue, 18 Jun 2024 18:23:48 -0400
From: Wade Wall <wade.wall at gmail.com>
To: Alberg 30 Public List -- open to all
<public-list at lists.alberg30.org>
Subject: Re: [Public-List] Recommendations for replacement seacocks
and thruhulls
Message-ID:
<CALHkh9T2hNc8TJ3onS2MoWu_uGJ1tUECF9sBi8Owo7i-H0OXBQ at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
>
>
> Thanks for all the information. This gave me much better understanding of
> what I need to do.
Wade Wall
>
------------------------------
Message: 2
Date: Wed, 19 Jun 2024 08:36:09 -0400
From: John Johnston <danceswithwood at earthlink.net>
To: Public-List at lists.alberg30.org
Subject: [Public-List] Best prop?
Message-ID: <CF6CEAF1-63AF-4444-9941-914E843A856D at earthlink.net>
Content-Type: text/plain; charset=utf-8
Hello folks, especially those Alberg owners who have diesel engines - Can you recommend a 3 blade prop that is suitable for the aperture limitations? The 14? height calls for a smaller prop to be effective-
Thanks!
John Johnston
Alberg 69
Sent from my iPad
------------------------------
Message: 3
Date: Wed, 19 Jun 2024 08:50:16 -0400
From: Pier-Andr? Bouchard St-Amant <pabsta at mykolab.com>
To: Alberg 30 Public List -- open to all
<public-list at lists.alberg30.org>
Subject: Re: [Public-List] Best prop?
Message-ID: <F85D4C9D-9D1D-4D48-AA17-19F63866CDCE at mykolab.com>
Content-Type: text/plain; charset=utf-8
Hi John,
I used a 13" featherstream 3 props on Jean-du-Sud. Here for the model:
https://www.darglow.co.uk/featherstream/
Here for the original calculations:
https://en.jeandusud.com/repowering-an-alberg-30-part-1/
The biggest downside of this model is the price. The upside is reduced drag.
Upon purchase, they will adjust the blades' angle to the most efficient angle at peak power. You can adjust the angle at a later time, or ask them for an angle specific to your calculations (peak power at low rpm, etc)
I would pay attention to the propeller size and the rudder max availlabe size while in a full turn (on both sides). That is also an implicit limit on the propeller size.
Best,
Pier, #399
Le 19 juin 2024 08 h 36 min 09 s HAE, John Johnston via Public-List <public-list at lists.alberg30.org> a ?crit?:
>Hello folks, especially those Alberg owners who have diesel engines - Can you recommend a 3 blade prop that is suitable for the aperture limitations? The 14? height calls for a smaller prop to be effective-
>Thanks!
>John Johnston
>Alberg 69
>Sent from my iPad
>_______________________________________________
>These businesses support your Association:
>http://www.alberg30.org/store/A30supporters.html
>Please support them.
>_______________________________________________
>Public-List mailing list
>Public-List at lists.alberg30.org
>http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
------------------------------
Message: 4
Date: Wed, 19 Jun 2024 09:38:16 -0400
From: John Johnston <danceswithwood at earthlink.net>
To: Alberg 30 Public List -- open to all
<public-list at lists.alberg30.org>
Subject: Re: [Public-List] Best prop?
Message-ID: <29BB5D5D-0FBD-4E5F-8375-ACB8799672F9 at earthlink.net>
Content-Type: text/plain; charset=utf-8
Thanks, Pier for the prompt and very informative reply. Changing the aperture size to accommodate a larger prop is an interesting approach, and perhaps one I will pursue in the future while hauled out. What I am seeking right now is an off the shelf prop that will work best within existing limitations of the aperture. I don?t want to miss another Summer not sailing, and I don?t have the time ( nor the heart) to do more than a quick
haulout and install.
All the best,John
Sent from my iPad
> On Jun 19, 2024, at 8:51?AM, Pier-Andr? Bouchard St-Amant via Public-List <public-list at lists.alberg30.org> wrote:
>
> ?Hi John,
> I used a 13" featherstream 3 props on Jean-du-Sud. Here for the model:
>
> https://www.darglow.co.uk/featherstream/
>
>
> Here for the original calculations:
> https://en.jeandusud.com/repowering-an-alberg-30-part-1/
>
> The biggest downside of this model is the price. The upside is reduced drag.
>
> Upon purchase, they will adjust the blades' angle to the most efficient angle at peak power. You can adjust the angle at a later time, or ask them for an angle specific to your calculations (peak power at low rpm, etc)
>
> I would pay attention to the propeller size and the rudder max availlabe size while in a full turn (on both sides). That is also an implicit limit on the propeller size.
>
> Best,
>
> Pier, #399
>
>
>
> Le 19 juin 2024 08 h 36 min 09 s HAE, John Johnston via Public-List <public-list at lists.alberg30.org> a ?crit :
>> Hello folks, especially those Alberg owners who have diesel engines - Can you recommend a 3 blade prop that is suitable for the aperture limitations? The 14? height calls for a smaller prop to be effective-
>> Thanks!
>> John Johnston
>> Alberg 69
>> Sent from my iPad
>> _______________________________________________
>> These businesses support your Association:
>> http://www.alberg30.org/store/A30supporters.html
>> Please support them.
>> _______________________________________________
>> Public-List mailing list
>> Public-List at lists.alberg30.org
>> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-List mailing list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
------------------------------
Message: 5
Date: Wed, 19 Jun 2024 09:56:59 -0400
From: Pier-Andre Bouchard St-Amant <pabsta at mykolab.com>
To: Alberg 30 Public List -- open to all
<public-list at lists.alberg30.org>
Subject: Re: [Public-List] Best prop?
Message-ID: <AF2158A9-8596-4BE8-86A2-87F95BE44E5A at mykolab.com>
Content-Type: text/plain; charset=utf-8
I understand. I would not have undertaken such task if Jean-du-Sud already had an aperture.
You can however reduce the featherstream size to fit a standard apterture. Which size is best, then, is a question for someone else.
Fair winds!
Pier, #399.
--
Pr Pier-Andr? Bouchard St-Amant
Bur.: +1-514-849-3989 #3923
Cell.: +1-514-424-6632
pabsta.qc.ca <http://pabsta.qc.ca/>
> Le 19 juin 2024 ? 09:38, John Johnston via Public-List <public-list at lists.alberg30.org> a ?crit :
>
> Thanks, Pier for the prompt and very informative reply. Changing the aperture size to accommodate a larger prop is an interesting approach, and perhaps one I will pursue in the future while hauled out. What I am seeking right now is an off the shelf prop that will work best within existing limitations of the aperture. I don?t want to miss another Summer not sailing, and I don?t have the time ( nor the heart) to do more than a quick
> haulout and install.
>
> All the best,John
> Sent from my iPad
>
>> On Jun 19, 2024, at 8:51?AM, Pier-Andr? Bouchard St-Amant via Public-List <public-list at lists.alberg30.org> wrote:
>>
>> ?Hi John,
>> I used a 13" featherstream 3 props on Jean-du-Sud. Here for the model:
>>
>> https://www.darglow.co.uk/featherstream/
>>
>>
>> Here for the original calculations:
>> https://en.jeandusud.com/repowering-an-alberg-30-part-1/
>>
>> The biggest downside of this model is the price. The upside is reduced drag.
>>
>> Upon purchase, they will adjust the blades' angle to the most efficient angle at peak power. You can adjust the angle at a later time, or ask them for an angle specific to your calculations (peak power at low rpm, etc)
>>
>> I would pay attention to the propeller size and the rudder max availlabe size while in a full turn (on both sides). That is also an implicit limit on the propeller size.
>>
>> Best,
>>
>> Pier, #399
>>
>>
>>
>> Le 19 juin 2024 08 h 36 min 09 s HAE, John Johnston via Public-List <public-list at lists.alberg30.org> a ?crit :
>>> Hello folks, especially those Alberg owners who have diesel engines - Can you recommend a 3 blade prop that is suitable for the aperture limitations? The 14? height calls for a smaller prop to be effective-
>>> Thanks!
>>> John Johnston
>>> Alberg 69
>>> Sent from my iPad
>>> _______________________________________________
>>> These businesses support your Association:
>>> http://www.alberg30.org/store/A30supporters.html
>>> Please support them.
>>> _______________________________________________
>>> Public-List mailing list
>>> Public-List at lists.alberg30.org
>>> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>> _______________________________________________
>> These businesses support your Association:
>> http://www.alberg30.org/store/A30supporters.html
>> Please support them.
>> _______________________________________________
>> Public-List mailing list
>> Public-List at lists.alberg30.org
>> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-List mailing list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
------------------------------
Message: 6
Date: Wed, 19 Jun 2024 10:22:37 -0400
From: Mike Lehman <mlehman at gmail.com>
To: public-list at lists.alberg30.org
Subject: Re: [Public-List] Best prop?
Message-ID:
<CAApdQjrbJWjhte_GT_yd2zSH43c289i_D8UDGrypyPiypfhCaQ at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I have a 3 blade 12 diameter 10 pitch 7/8 shaft on our A30 with a
Universal 30 hp 4 cylinder. People comment that I could pull water skiers.
The reason for 12" is to reduce prop wash and noiseon the hull.
On Wed, Jun 19, 2024, 9:57?AM Pier-Andre Bouchard St-Amant via Public-List <
public-list at lists.alberg30.org> wrote:
> I understand. I would not have undertaken such task if Jean-du-Sud already
> had an aperture.
>
> You can however reduce the featherstream size to fit a standard apterture.
> Which size is best, then, is a question for someone else.
>
> Fair winds!
>
> Pier, #399.
>
>
> --
> Pr Pier-Andr? Bouchard St-Amant
>
> Bur.: +1-514-849-3989 #3923
> Cell.: +1-514-424-6632
> pabsta.qc.ca <http://pabsta.qc.ca/>
>
> > Le 19 juin 2024 ? 09:38, John Johnston via Public-List <
> public-list at lists.alberg30.org> a ?crit :
> >
> > Thanks, Pier for the prompt and very informative reply. Changing the
> aperture size to accommodate a larger prop is an interesting approach, and
> perhaps one I will pursue in the future while hauled out. What I am seeking
> right now is an off the shelf prop that will work best within existing
> limitations of the aperture. I don?t want to miss another Summer not
> sailing, and I don?t have the time ( nor the heart) to do more than a quick
> > haulout and install.
> >
> > All the best,John
> > Sent from my iPad
> >
> >> On Jun 19, 2024, at 8:51?AM, Pier-Andr? Bouchard St-Amant via
> Public-List <public-list at lists.alberg30.org> wrote:
> >>
> >> ?Hi John,
> >> I used a 13" featherstream 3 props on Jean-du-Sud. Here for the model:
> >>
> >> https://www.darglow.co.uk/featherstream/
> >>
> >>
> >> Here for the original calculations:
> >> https://en.jeandusud.com/repowering-an-alberg-30-part-1/
> >>
> >> The biggest downside of this model is the price. The upside is reduced
> drag.
> >>
> >> Upon purchase, they will adjust the blades' angle to the most efficient
> angle at peak power. You can adjust the angle at a later time, or ask them
> for an angle specific to your calculations (peak power at low rpm, etc)
> >>
> >> I would pay attention to the propeller size and the rudder max
> availlabe size while in a full turn (on both sides). That is also an
> implicit limit on the propeller size.
> >>
> >> Best,
> >>
> >> Pier, #399
> >>
> >>
> >>
> >> Le 19 juin 2024 08 h 36 min 09 s HAE, John Johnston via Public-List <
> public-list at lists.alberg30.org> a ?crit :
> >>> Hello folks, especially those Alberg owners who have diesel engines -
> Can you recommend a 3 blade prop that is suitable for the aperture
> limitations? The 14? height calls for a smaller prop to be effective-
> >>> Thanks!
> >>> John Johnston
> >>> Alberg 69
> >>> Sent from my iPad
> >>> _______________________________________________
> >>> These businesses support your Association:
> >>> http://www.alberg30.org/store/A30supporters.html
> >>> Please support them.
> >>> _______________________________________________
> >>> Public-List mailing list
> >>> Public-List at lists.alberg30.org
> >>> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
> >> _______________________________________________
> >> These businesses support your Association:
> >> http://www.alberg30.org/store/A30supporters.html
> >> Please support them.
> >> _______________________________________________
> >> Public-List mailing list
> >> Public-List at lists.alberg30.org
> >> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
> > _______________________________________________
> > These businesses support your Association:
> > http://www.alberg30.org/store/A30supporters.html
> > Please support them.
> > _______________________________________________
> > Public-List mailing list
> > Public-List at lists.alberg30.org
> > http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-List mailing list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>
------------------------------
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