[Alberg30] A-4 and Propeller

[quest433 at msn.com]

For what its worth:
The 13 X 7 prop is correct.  But 80% of full rpm is .8(3000) = 2400 rpm which is too high if I'm remembering right.  I seem to remember normal cruising speed rpm is 1600.  1000 rpm's for idle sounds to high too.  Maybe its time for a new tachometer.

----- Original Message -----
From: George Dinwiddie
Sent: Wednesday, March 12, 2003 9:36 PM
To: Alberg 30 public list
Subject: Re: [Alberg30] A-4 and Propeller

Villo Marmei wrote:
> His boat has an A-4 and a propeller 2 Blade 13 dia  x 7R pitch. He  
> claims that his boat is to fast on docking  3.9 knots at 1000 rpm and  
> does not reach cruising  / hull speed  at normal 80% engine rpm. He  
> thinks that the previous owner changed the prop and this one is not the  
> right one.
> Can some of you A-4 fellows out there just tell me what size/pitch/blade  
> propellers are your machines running with.

That's the standard prop as installed by Whitby on the Alberg 30.  The  
experts will tell you it's too big for the aperture and too much pitch  
because the engine runs too slowly at cruising speed.  To me, it seems  
to work well enough and has done so for 30 years on my boat.  When  
docking, I'm generally in neutral by the time I get near the dock, just  
giving short bursts of power as needed.


> PS: I have some sort of pass word for our public-list.....am I supposed  
> to show the  pass word each time I send an e-mail to the site or is it  
> the same as with regular e-mail????

Welcome to the list!  You only need the password when changing your  
subscription settings.  It's just a weak security measure to keep  
someone else from changing them as a joke.  To send mail to the list,  
it's just regular email.  Note, however, that the list adds it's own  
address to the "reply to" field, so if you want to reply off list, you  
have to remember to change the "to" of your reply.

  - George

--  
  ----------------------------------------------------------------------
   Hope your road is a long one.                        George Dinwiddie
   May there be many summer mornings when,       gdinwiddie at alberg30.org
   with what pleasure, what joy,                 http://www.Alberg30.org
   you enter harbors you're seeing for the first time;
                                            from 'Ithaka' by C.P. Cavafy
  ----------------------------------------------------------------------

+-=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=-==+
|      Standard Horizon HX350S   --   ON SALE NOW   --   Submersible Handheld VHF      |
| http://www.myaffiliateprogram.com/u/sailnet/t.asp?id=1066&p=store/item.cfm?pid=21563 |
+-=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=--=-==+

Public-list mailing list -- Public-list at alberg30.org
http://www.alberg30.org/mailman/listinfo/public-list
To unsubscribe: email to Public-list-request at alberg30.org
Include command "unsubscribe <password>" in subject or body.
Use command "help" for more options.
 +- |      Standard Horizon HX350S   --   ON SALE NOW   --   Submersible Handheld VHF      |
 | http://www.myaffiliateprogram.com/u/sailnet/t.asp?id66&p +-
Public-list mailing list -- Public-list at alberg30.org
http://www.alberg30.org/mailman/listinfo/public-list
To unsubscribe: email to Public-list-request at alberg30.org
Include command "unsubscribe <password>" in subject or body.
Use command "help" for more options.

 1047527787.0