Bruce S,
“Gary;
I've read your post(s) about this.
There's a couple things you'll need to know/understand.
Can you rewire them to do this, probably. However, more than likely the 1st F&P will need to be built so the power output is greater than what the 2nd one needs, otherwise the power will merely dissipate into the 2nd's windings , similar to to building a water heated by solar panels, ya gotta get over the hump needed to start the heating/power to start the 2nd one moving.
That's fine, I am well versed in the Law of Conservation of Energy and certainly not expecting any perpetual motion with more energy coming out than going in. This dissipation you mention; are you referring to simple heating of the motor coils if stalled? I'm not aware of any “hump†to start heating water with solar or anything else. As soon as the temperature of the heating-material exceeds the temperature of the to-be-heated material heat transfer begins.
“The University design team also knew that human power is at startup ~750 watts , unsustainable long term, but using that information and allowing for the startup torque a human can produce, the ~50w isn't going to work very wellâ€
I couldn't find anything about this 750 w startup need at the University of Michigan site. Can you point me to it? I can understand additional energy being required for an instant at startup but a spinning prop has a great deal of stored energy that could be used to overcome the startup load, it's just a matter of putting it to use.
“NOT to mention the 100 foot distance and the voltage drop you're going to incur.â€
It appears that a benefit of using these F&P type devises is the high voltage to reduce I^2 R loses, just like the power company does. #14 copper wire is cheap enough and has only 0.25 oms/100 feet. If I ended up with some design that the voltage was low enough that 5 amps were required the I^2 *R loss would only be 5*5*0.25*2 = 12.5 W.
What others are possibly trying to help you with understanding; is the real world power you're going to need since water comes in about 8lbs/gal.
8 lb/gal * 5 gal/min * 12 ft rise = 480 ft lb/ min.
The conversion of ft lbs of energy to watts is 0.023 W per ft lb so
480 ft lb/min * 0.023 = 11 Watts
Say the pump is only 50% efficient that would require 22 watts + the wire loss of 12.5 Watts = 34.5 Watts.
Per Piggotts â€Wind Power Workshop†I can expect an 80†prop generator to develop around 50 W at 10mph which is easy to come by around here. Do you see an error in the background of what I propose?
Hopefully I can soon switch from proposing to realizing, the big brown truck just delivered my fan.