[AJD] Physics 101

[Dave Mayfield]

Well, back in my flying days. We use to preheat alot of engines. We had a
large heater cart, it was justa big furance on wheels. It ran on 100 octane
Av-gas. I pre-heated lots of DC-3's. The main reason you did this was to
thin the oil. On a DC-3 each engine had a 25 gal oil tank, and if you did
not heat it up before you started the engine, the oil would be so think that
the engine could not draw oil from the tank. You know what happens then.

I have started my 48 B, when the temp was around Zero, it started but it
took some doing. A pre-heater would be great.

J. Dave Mayfield
www.w9wrl.com
----- Original Message -----
From: <nick_solomon at infostations.com>
To: "Antique John Deere mailing list"
<antique-johndeere at lists.antique-tractor.com>
Sent: Tuesday, February 01, 2005 3:40 PM
Subject: Re: [AJD] Physics 101


> My gal put her car in a ditch a few weeks back at 10 at night and was
> going to have to be back to work at 8 in the morning, so I went to crank
> up my '47 model b, and I don't think I could have started it for all the
> money in the world. it was -23f actual air temp. to be honest, my other
> car wouldent even start the next morning and it had been plugged in to all
> night as well... I guess that once it gets past a certain point some
> engines won't run? I don't know.... being from Ca this Minnesota weather
> is really eye opening.....
>
> can any body give me any tips for extreme cold (-20F or colder) operation
> of engines? aside from the obvious of using a nice thin oil?
> Nick Solomon
>
> > What is the physics behind our old treasures being harder to start in
cold
> > weather?
> >
> > Is the ignition system affected by the cold?
> > Is the fuel mixture somehow different?
> > Is it harder to burn the fuel mixture enclosed by cold iron?
> > The physical effects of the thickened oils are obvious, but are there
> > other
> > issues with oils as well?
> > What about air intake?  Any changes there?  Am I more likely to suck a
> > glob
> > of oil from the breather into the carb during cold weather?
> > Aside from the obvious effects from freezing, does the coolant system
> > behave
> > differently during cold weather?
> >
> > My old John Deere tends to wake up pretty well on a cold morning, about
as
> > well as I do, but the definition of cold here in Texas is different than
> > it
> > is elsewhere.
> >
> > Thanks!
> >
> > Cal B.
> > Nacogdoches, Texas
> >
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