Re: [Vo]:BB motor resistance measurements

[Horace Heffner]

Looks like Frank Stenger, an old vort, may have identified the likely  
cause of the 3 V or so drop. It is something called "brush drop"  
caused by the graphite.  It is about 0.5 to 1.0 volts per brush, and  
for two bearings, two sides to each ball, that's 4 brushes.

Google ("brush drop" volt).

Best regards,

Horace Heffner
http://www.mtaonline.net/~hheffner/