What is the rod attached to the top of the Bell UH-1N's rotors? So, I was looking at an image of a Bell UH-1N, and noticed that the top if the rotor has a little stick or rod
What is this rod for? I also see this rod on a RC helicopter.
It is a stabilizer bar used on some two blade helicopters. The spinning weights want to stay in one plane and are used in conjunction with the cyclic to control changes in pitch and roll. Depending on how it is designed, it counters these changes making the helicopter more stable (less maneuverable).