How Helicopter Tailrotors Work скачать в хорошем качестве

How Helicopter Tailrotors Work

Helicopter control relies on countering the torque of the main rotor. The are many ways to do this, but the most common is the use of a tail rotor. Tailrotors function not only as an anti-torque device, but also as a yaw control device. Many tailrotors use a flapping hinge called a delta-3 hinge to introduce pitch flap coupling. This video will also cover design specific details of the UH-60 Blackhawk tailrotor. In helicopters, controlling torque produced by the main rotor is necessary for controlled flight. While there are various methods to achieve this, the most common solution is the tail rotor. A tail rotor not only counters main rotor torque but also provides yaw control, allowing for direction changes while hovering. Many tail rotors, including the one on the UH-60 Blackhawk, feature a unique flapping hinge known as a delta-3 hinge. This hinge introduces pitch-flap coupling, which constrains maximum blade flapping. In this video, we'll cover the principles of tail rotor function, explore the design intricacies of the UH-60 Blackhawk's tail rotor, and examine how these systems work together to maintain stability and control. References Black Hawk: The Story of a World Class Helicopter, Leoni, R.D., 2007, American Institute of Aeronautics and Astronautics US Patent; Rotor System With Pitch Flap Coupling, Schmalling, D.N, US 2008/0112808 US Patent; Optimized Composite Flexbeam for Helicopter Rotors, Schmalling, D. N, US 1998/5738494 US Patent; In-Plane and Out-of-Plane Flapping Prop-Rotor Frequency Decoupling, Gaffey, T.M, Wernicke, K. G, US 1974/28045 US Patent; Circulation Control Slots in Helicopter Yaw Control System, VanHorn, J., US 1990/4948068 Robinson Tail Rotor Design and History; Tucker, T; 2020 timtuckershelicopterworld.com (https://www.timtuckershelicopterworld...) Image Credits H-19 Rotor Hub https://commons.wikimedia.org/wiki/Fi... Alan Radecki Akradecki, CC BY-SA 3.0 https://creativecommons.org/licenses/..., via Wikimedia Commons Public Domain images are credited within the video 00:00 Intro 00:37 Anti-torque to Counter Main Rotor Rotation 01:14 Methods of Anti-torque 03:38 Anti-torque Control 04:37 Yaw and Heading Control 05:05 Dissymmetry of Lift 06:14 Pitch Flap Coupling 06:45 Delta-3 Flapping 09:07 Delta-3 on Main Rotor Blades 09:57 Historical Perspective 10:26 Tailrotor Drive System 11:45 Right or Left Side Tailrotor 13:44 The Blackhawk Right Side Tailrotor 15:40 Flexbeam Tailrotor 17:03 Canted Tailrotor