Rraetor,
If '"pushing" the shaft' implies rotating a shaft that is common to, or concentric with, the aero-rotor and the motor; then it is a viable idea. In fact, this idea has previously been done, displayed and discussed on numerous occasions, this forum being one of them.
Sikorsky liked it so much that they are still attempting to patent the pre-existing idea; to exclusion of all others.
The idea of using the airflow through the rotor to charge the batteries was also discussed on PPRuNe,
on this thread.
Brilliant ideas, if I may be permitted to say so.
Anonymous