[Public-List] Best prop?

[John Johnston]

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-André 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 écrit :
>> 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
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