[Public-List] propeller choice

[Jay Davenport via Public-List]

Dwayne,
Thanks for the advice. Do you have any problems with cavitation? Does the 12 x 9 move you at hull speed? I'm not sure whether the prop aperture in my liner-boat is the same as in your non-liner boat. My aperture is 14" high, and      8 1/2" fore & aft.
Jay
      From: Dwayne Back <sifuback at yahoo.com>
 To: Jay Davenport <jay at saildriver.com>; Alberg 30 Public List -- open to all <public-list at lists.alberg30.org> 
 Sent: Monday, February 2, 2015 1:42 PM
 Subject: Re: [Public-List] propeller choice
   
I have a Beta 16 with a 12 x 9 three blade propeller.  Ideally (according to beta) you would use a 13 x 8 propeller but the Albergs do not have room for the 13 blade.  I have no real complaints.  Purchased mine from Michigan Wheel.
DwayneOrion #94 

     On Monday, February 2, 2015 1:20 PM, Jay Davenport via Public-List <public-list at lists.alberg30.org> wrote:
   

 I am installing a Beta 16 diesel in my Alberg 30. It will run at 3600 rpm, with a 2:1 reduction ratio.
The old Atomic 4 engine spun a 10 x 6 three-bladed prop. I made hull speed at about 2200 rpm direct.
I would appreciate any advice (preferably from experience) on what 3-blade prop size would work best with the Beta. I am considering a 11 x 9. Part of my concern is getting the most effective push from the prop, while avoiding cavitation from excessive prop diameter.
Jay DavenportRevolution, A30 #526
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