I use cordless hand drills for the majority of the drilling. Each drill has two sets of batteries so that I don't have to wait for the batteries to recharge. Cordless drills are easier to use than regular corded drills because the cords don't snag on the parts. The long, angle drill is used to drill into tight places.

Professional aircraft builders use pneumatic drills ("air drills") because they are smaller and lighter than corded drills. Because they are powered by compressed air, they run much cooler than corded drills. They do require an air compressor, though.