I have a large piston effect where an induction device may be implemented
The available throw room on the piston rod is 20ft
The piston rod is 4" dia
The rod moves at 2ft/sec
The device can carry a weight on the rod on 2000lbs without disturbing the cycle
The rod can accept a sleeve to increase the rod dia.

Questions: to maximize the devices capability to produce a usable electric current:
How many magnets?
What size of magnets?
How many coils?
What size of coils?
What is the optimum wattage that can be generated?

Thanks for your time