[Public-list] campbell sailer prop

[Dave Terrell]

Alan

thanks. That is a great help. If I go with Michigan Wheel, it takes
about 5 or 6 weeks to get the propeller. Campbell is a lot faster. Since
my launch date is around May 1, I have time. I will wait for your
observations. It sounds like you come close to Don's standard of 1800
RPMS. Weather in Northern Michigan: 3-5 inches of snow predicted, Temp
is about 25, but my fingers feel a lot colder. Can't hardly wait to
start woriking on the boat.

David, 432 - Talismin

>>> alanslater at telus.net 02/28/06 11:41 PM >>>
Dave,
I don't think that I could even reach 2000 RPM while under way. I think
my
maximum RPM is about 1800, and that is slightly higher than when I had
the
two blade prop installed. I cruise at 5 knots at 1200 RPM and 6 knots
at
around 1500 RPM. That's as close to hull speed as I like to run
comfortably.
The weather on the west coast is like spring these days, and  I'll soon
go
for a spin and get a better evaluation. If you have a bit of time I can
get
back to you later with full range speed curve.

Cheers,
Alan


----- Original Message ----- 
From: "Dave Terrell" <DTERRELL at message.nmc.edu>
To: <public-list at alberg30.org>
Sent: Tuesday, February 28, 2006 3:35 PM
Subject: Re: [Public-list] campbell sailer prop


> thanks for the response. In your experience, do you think running at
> 2000-2400 as they claim you can is really an option? Or is it the
case
> that you can make hull speed at low RPMs and do not need to rev the
> engine  up to higher levels?
>
> Thanks for your thoughts
>
> David, 432 - Talisman
>
> >>> alanslater at telus.net 02/27/06 10:30 PM >>>
> Last year I installed a 10x6 3 blade Cambell Sailer propeller on my
> Atomic
> 4. I find I get the same speed per RPM as my original 13x7 Columbian
> two
> blade. The major diferences I found was that the 3 blade is a lot
> smoother
> while cruising under power at around 1200 to 1500 RPM. The two blade
> prop
> would tend to cavitate and produce a vibration as the blades aligned
> with
> the keel. Also I found slightly less power in reverse, as in
> manouvering at
> the dock. Over all I am very happy with it and the spare two blade
> stowes
> away nicely.
> I got mine from Robert Hess at Atomic 4 Engine Services in
Vancouver.
> You
> might find his website helpfull.
> http://www3.telus.net/Atomic_4_Eng_Service/ 
>
> Alan Slater
> Romp # 358
>
>
>
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