Though we have a neighbor who likes climbing trees and towers, all of us would rather service our wind machines on the ground than have to climb around like a monkey 50 feet in the air. An anemometer is essential for comparing the performance of your wind generator to the wind speed. The popular, inexpensive Air 303 used plastic prop blades that would flex during too much wind, thus slowing down the prop. This method is unfortunately noisy and full of vibration. The Jacobs models used effective but complicated variable pitch propellors to regulatespeed.
Some designs use a folding tail that can be operated from the ground.
Without a tail, the wind generator will tend to point away from the wind. Our personal experience up here in Colorado is that is much easier to simply use a length of flexible cable instead of slip rings. Use a length of wire that allows about 3 or 4 wraps around the pole. Provide heavy-duty strain relief at the generator and at the tower. So the wire will not get stretched, cut a length of aircraft cable slightly shorter than the wire and attach it on both ends too, so the aircraft cable will stop it before the wire streches.