Electric power measurements should not be based upon an assumed power
factor, as this may vary within any electricity network. Power factor was completely
accounted for with a direct connect digital polyphase meter ZMB120T244 by
Landis and Gyr. It was generally found that kW is proportional to rpmn, where
exponent n was about 1.6, varying as detailed in Fig. 1. The speed of paddlewheel
operation was determined by the frequency of alternating current (A/C) electric