From: Bjorn Brandstedt (super_deuce@hotmail.com)
Date: Fri Jun 25 2004 - 07:12:22 PDT
Good post, Ron,
The same applies to any diesel, running my deuce at 1,200 rpm or so when
using the knuckleboom crane for periods of time at less than operating
temperature is never good. Usually after a few crane sessions, I take the
truck for a run to get the temp up and blow the pipes clean...
Bjorn
Meadows of Dan, Virginia
>From: "Ron" <rojoha@comcast.net>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Subject: Re: [MV] Mil/Non-Mil Generator
>Date: Fri, 25 Jun 2004 08:49:42 -0400
>
>Diesel generators running at little or no load are prone to "wet stacking".
>Since a diesel is most efficient under high load conditions vs. a gas
>engine, it works best under load (relatively steady RPM and therefore heat
>generation).
> Folks talk about 'slobber' when diesel truck engines idle for long
>periods and are then accelerated. This is due to the large amounts of
>unburned fuel being deposited on the relatively large areas of metal in the
>exhaust system that are very cool at idle speeds. The same happens on a
>lightly laden diesel generator, but is much more of a problem since you are
>more likely to run it this way for hours or days. Carbon builds up in the
>exhaust passages, muffler and in severe cases, the cylinder heads
>themselves. When you finally apply a major load to the generator, it can't
>'put out' due to the restricted/reduced passages until it finally warms up
>and starts to burn out the accumulated crap, which can sometimes be quite
>spectacular in both smoke and particles (some times flaming/glowing chunks
>of carbon).
> If you have highly variable loads, and only use the generator
>occasionally, a gas engine generator is best. If you have a constant 3 KW
>load, a 10 KW diesel will work but don't expect to pull an 8 KW load off it
>occasionally or you will be surprised. Get a 5 KW diesel gen set for the
>lighter loads.
>
>
> There were several PS mag articles over the years as they converted to
>diesel from gas (One Fuel Forward doctrine) and discovered the error of
>their ways. Most of the good ones are pre internet issues, but here is an
>explanation from one:
> http://www.logsa.army.mil/psma/1997/537/537-38-39.pdf
>
> According to them, they want 80% load at all times...
>
> Regards, Ron
>
>----- Original Message -----
>From: "Larry Tighe" <larryradio@worldnet.att.net>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Sent: 24 June, 2004 14:49
>Subject: [MV] Mil/Non-Mil Generator
>
>
> > I have a diesel generator, 100 KW, that requires a 30 % load across the
> > output at all times...according to the manual.
> >
> > Can anyone tell me why that is? Possibly the regulator can't regulate
>the
> > field dependably without that much load? It's consuming 5 gal./hr. just
>for
> > the 30 KW dummy load and that's "prohibitive".
> >
> > Lar
> > M151A2
> > M998
> > M274A2
> > CH-47D
> >
> >
> > www.antiquetelephone.com
> >
> >
> >
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> >
>
>
>
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