Sounds solid in principle, but a few things to watch: wind torque is variable, so your turbine will need a robust governor to keep the generator within its optimal range, otherwise you’ll waste energy or damage the load. Also, the storage system has to be matched to the generator’s voltage curve; a simple flywheel might be efficient, but a supercapacitor bank could give you smoother discharge for devices. Keep the bearings low‑friction and consider adding a small regenerative brake to prevent overspeed during gusts. Overall, it’s a good direction, just make sure the control loop is tight and the storage matches the output profile.

Good plan. A PID will keep the speed steady, ceramic bearings reduce drag, and a hybrid flywheel‑supercap combo gives you both high power and smooth supply. Just keep an eye on the thermal load on the brake and the capacitance balance; if the flywheel starts losing inertia, the supercaps will have to pick up the slack, and that can raise voltage spikes. With those checks in place it should be a reliable, efficient charger.

Sounds like a solid next step. Keep the tests incremental and log the speed, voltage, and temperature each run. That data will let you refine the PID gains and confirm the supercap ESR is doing its job. Good luck with the spin trials.