SOOT IN THE FLUES

By Anna Mae
Published on September 1, 1981
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Hi! Dear Ones in Iron-Men Family! September-October issue means
schools will be open, leaves to be raked, and pumpkin pies to be
made, and Halloween parades and costumes but since this magazine
comes out the first of August, it really means we are still in the
swing of things pertaining to engines, shows, new friends, miles to
travel, as you enjoy your summer experiences with fellow friends.
Did you find a new engine to work on and love or perhaps you jotted
down some helpful tips that you can put to good use this winter as
you repair and shine up that piece of equipment you purchased in
summer of ’81? Well, there’s no need to tell you to enjoy
yourself, for that just goes with the package of being a steam
fiend and now onto our letters that you all watch for each issue
for there is much to learn each time as the readers tell of their
experiences or inquire for help.

The following letter is one of constructive criticism and of
further knowledge; we hope it will be accepted in that manner. This
column is for friends to use in acquiring data and in exchanging
views about their interest in steam. HERBERT H. ELTZ, Box 109,
Juniata, Nebraska 68955 writes: ‘In your May-June ’81 issue
of IMA, page 17, Gary Kappedal has a story about generators and
alternators there are several things I can’t agree with and
since I’ve been in the electrical business for almost 50 years,
I’m no newcomer.

It’s always been common knowledge that a motor will generate
the same direction that it motors; a generator will motor the same
direction it generates. If his motor generated going backwards, the
brushes had to be set close to the neutral point; if so, it should
generate going either way. Many impact wrenches change rotation by
shifting brushes either side of neutral point.

A simple test: Take a motor, run it from a battery and it will
draw current. Drive it faster with external power and a point will
be reached where it draws zero power. Drive it still faster and it
will generate power back to the battery. Series wound motors like
heater type are poor generators.

Take a P.M field type of motor and it will generate going either
way. On page 18, I don’t agree that electricity and magnetism
like to flow on outside of conductor. D.C. does not flow on outside
or skin of a conductor, unless he is talking about lightning. If it
did, we could use hollow conductors.

It’s only when you get into high frequency that tubing can
be used for conductors. In all large radio transmitters coils, they
are either made of tubing or flat ribbon to get large surface
area.

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