I copied the scheme on a small machine once. Needed great skill to keep it balanced as the fan blades opened but if you have the real thing it may not be an issue.
Two blades are not without their problems and the inertia of the brake device doesn't cure all the yaw vibration but you should be able to live with it.
You will have to check that the operating speed will give you protection at the speed to suit your alternator, I am not sure about the big ones but the small Wincharger was fast.
Flux