SOOT IN THE FLUES


| September/October 1981



Soot in the flues

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.