1916 Model SF Roadster (Convertible)

[bomarkham]

Some time ago, I was looking for parts for a Wagner Electric E.M. 126 Generator on a 1916 Right Hand Control Roadster (Convertible) 4 cylinder engine.  I finally was able to send the field coils, armature and generator cut out off for rewind, and seal.  I am putting the beast back together.  I've not been able to find much information about the charging system on this car, so I'm working close to being in the dark.  I've found no voltage regulator on this car and I'm wondering how the system works to control the charge, rather to prevent an under, or over charge from occurring? Preventing an over charge, ie, burning itself out, again, is probably the more critical of the two.  Does anyone know how many amps/volts the generator should be charging at?   Since this is a 6 volt system, I'm guessing some where around 25 amps and around 8 volts?  Also, what RPM range does this generator operate in? I'm guessing it activates as needed between 500 and 1,800 rpms? Not really sure?  But, it would seem to me that it really isn't a high speed operator, say at 3,400 rpm.  I don't think the engine revs that high!!!  Does anyone have a wiring schematic?  I'm not at all sure the thing was wired correctly to begin with, as it burnt itself up soon after getting the car started from a long nap.

 

Any help would be greatly appreciated.  

 

Bo

[mbstude]

Bo, are you working on this yourself? If it’ll help, Stephen has a 1916 4 cylinder touring car that you are more than welcome to come and look at. 
 

 

Edited January 6, 2021 by mbstude (see edit history)

[studebugga17]

Hi Bo

I have a 1917 ED 6 but the generator is the same model (EM 126 type 45 W) generator current regulation is by the third  brush system. Rotation is counter-clock wise viewed from the commutator end. maximum current output of 19 amps is reached at 20 mph.

Amps 

6.0 @ 800 Rpm

12.00 @ 1000 RPM

17.00 @  1200 RPM

19.25 @ 1400 RPM

15.00 @ 1700 RPM

12.50 @ 2000 RPM

9.00 @ 2500 RPM

The relay closes at 8-10 mph and opens at 6-8 mph.

I hope this helps.

Chris

[bomarkham]

The information you fellas have provided is being very helpful.

 

Now, does anyone know where I can get another cut-out for the thing, or a 20 amp reverse base diode?

 

Thanks, Bo

Edited January 9, 2021 by bomarkham (see edit history)

[studebugga17]

 Hi Bo

I found a 6V cut-out / relay on eBay. Probably just a matter of keeping an eye out on this site or others.

Chris