[Alberg30] Universal Diesel Power

Thu Sep 4 08:10:07 PDT 2003

Mike;

Thanks for the great information.  I was not aware of the 75-80% deal and
have been running at 1500 to 2000 RPM.  It sounds like it should be more
like 2600 to 2800.  I have noticed a slight pulsating motion that may be
caused by the two blade prop not "cutting."  It's good to know I have the
right engine for the boat, particularly since there is so many other things
to spend money on (like sails).  Should I contact Van Ness Engineering RE
matching power curve and boat design or is there anyone who has done it
before and can share their results?

The most complicated machinery I have had on previous boats is a 6 HP
outboard (that I still managed to destroy); and, on charters, when something
breaks, you just call Mister Fix It and have a beer till he shows up (except
for that time I decided not to wait and sailed up Back Creek; I still don't
know why the tow boat skipper was so mad).  I have to admit that having real
systems like plumbing, electrical and a diesel engine is a little daunting
and your help is greatly appreciated.

Thanks again,

Roger

----- Original Message ----- 
From: "Mike Lehman" <sail_505 at hotmail.com>
To: <public-list at alberg30.org>
Sent: Thursday, September 04, 2003 10:30 AM
Subject: Re: [Alberg30] Universal Diesel Power

> Roger,
>
> Engine HP is usually rated at full throttle, in your case probably 3600
RPM.
> At cruising speed your will not be as far up on the power curve. A
> three-blade props helps because the is always one blade "cutting", so it
is
> smoother and more consistent. The prop needs to be matched to both the
> boat's hull design and weight and to the power curve of the engine.
Ideally
> you should run a deisel under normal cruising conditions at 75-80% full
> power. The worst thing you can do to the engine is "labor" it with too low
> RPMs. The 18HP 3-cyl diesel is close to the ideal engine for the boat.
>
>
>
> Mike Lehman
> "Gilleleje" #505
>
>
>
>
>
> ----Original Message Follows----
> From: "Roger L. Kingsland" <rkingsland101 at ksba.com>
> Reply-To: Alberg 30 public list <public-list at alberg30.org>
> To: "Alberg30" <public-list at alberg30.org>
> Subject: [Alberg30] Universal Diesel Power
> Date: Thu, 4 Sep 2003 09:44:50 -0400
>
> Albergers (no fries);
>
> I would like to get into the fray RE diesel engine power.
>
> Mahina (#148) has a Universal 18 diesel which I believe develops 14 HP.
(So
> why the heck didn't they call it the 14?  Life's mysteries abound.)    It
> has a 2 blade prop, automatic bleed (that I do not know how to work) and
> about 500 hours run time.  (Why don't engines ever walk?)
>
> I have powered in calm seas in at 5 knots plus with fuel consumption under
> 1/2 gal per hour (11 gal tank).  I have also power sailed upwind
> successfully in 1 to 2 foot seas but have not been out in high winds
and/or
> seas.  Can anyone with this motor report on it's performance in these
> conditions?  Any opinions on weather a three blade prop would strain the
> engine too much?  Does anyone know what stocks will appreciate over 30% in
> the next week?
>
>
> Roger Kingsland
> Chief Financial Officer (AKA, check writer)
> Mahina Manu, A30 #148
> N40°  29.288'
> W79°  54.228'
>
> Author's Disclaimer; This email was produced exclusively by the sender
and,
> in the interest of expediency, without the benefit of editing by others.
> The sender, thank goodness, is a much better architect/sailor than
> speller/editor and, frankly, constantly laments an obvious flaw in "spell
> check," it does not know what the author is thinking.  Please accept the
> sender's sincere apologies for any "typos" that may appear in this
document.
>   If present, they are certainly unintended and hopefully do not cloud the
> message, or spawn any unnecessary lawsuits.
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 |                This Old Boat by Don Casey                     |
 | http://www.amazon.com/exec/obidos/ASIN/0071579931/alberg30-20 |
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