[Christ]

For educational purposes:

What you're saying is to seal the flywheel in there, attaching magnets to the flywheel itself, and then adding coils to the OUTSIDE of the casing to pickup the magnetic fields and create electrical current?

That's what I got from it.

What it led me to think:

Why not place the entire assembly inside the casing, with the flywheel(s) floating, and the coils attached to the inner walls of the casing?

Given the oblong shape of most air cylinders, would it be more beneficial to use more than one flywheel, or to create a single one that would occupy as much of the usable space as could be occupied?

The current could be carried out by wires, obviously, and a seal could still be maintained, under light vacuum. How much vacuum would be necessary/ideal?

Also, how would one impart energy TO the flywheels for storage?