Does anyone know how to check the output from one of these generators? I have removed it from the aircraft to check the brushes etc and found it to be full of oil and water. Now that I have cleaned it up and dried it out I would like to check that it is OK before refitting it.
Will
The old school quick way to check a generator is to apply power to it ( 6 or 12 volts depending on what it uses ) and it it is good it will run like an electric motor.
*IF* it is a generator, not an alternator....Originally Posted by vaflier
Ron Wanttaja
That's exactly what I would do with an old car or motorcycle generator but this Champion type seems to have a voltage regulator built into it. I don't want to apply power for fear of cooking the points on the regulator. It does appear to be a DC dynamo with brushes and a commutator rather than an alternator. On an old Brit bike you would connect the two output terminals together and measure the voltage between them and earth but I'm getting nothing this way. I should say that I have no reason to think that it is US but I don't want to find any problems later on in the rebuild. Thanks for the advice so far.
So, what do these things put out, 10A at 12V or something. Put a 75W incandescent lightbulb (don't worry, it won't light up, it's just the load) across the terminals and read the voltage while you blow on the thing with sufficient force (fan/hairdryer) . If it's 12V or so, you're OK.
I have tried measuring across all of terminals in all the permutations i can think of but still can not raise a reading on the multimeter. I have attached a couple of photos in case it jogs anyones memory. There appears to be no information at all on the internet.
Did you put a load on it? Anyhow, most auto generator shops that deal with antique cars could probably test it for you. Other than the fact that it's driven by a propeller it's not any different a car generator of the day.
Posting Permissions
Reply With Quote