[Alberg30] Atomic 4/prop Question

[George Dinwiddie]

The standard prop for both the Atomic 4 and Greymarine powered A30s was 
a "Columbian, 2-blade, 13" diameter, 7" pitch, right-hand standard taper 
for a 7/8" diameter shaft."

You're probably wondering why the boat cruises at around 1700 rpm when 
the power of the Atomic 4 is at considerably higher rpm, right?  Well, 
yes, the boat is over-propped by almost any rule of thumb.  The 13" 
diameter also puts the blade tips very close to the deadwood.  The books 
say it's all wrong.

But my boat's been running this way for 28 years with no apparent ill 
effects.  I think it's not broke and won't fix it.

  - George


bob wrote:
> For those of you that have the Atomic 4 engine, at full throttle, what
> engine RPM and speed do you have?
> 
> What prop size did the boats come with that had the Atomic 4 engine?
> 
> thanks,
> -bob

-- 
  ----------------------------------------------------------------------
   George Dinwiddie                             gdinwiddie at alberg30.org
   The gods do not deduct from man's allotted span those hours spent in
   sailing.                                    http://www.Alberg30.org/
  ----------------------------------------------------------------------

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