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| Demonstration of Collective and Cyclic Pitch Control of Helicopter Swash Plate |
Dr. Shrinivasa Mayya.D , Lokesh K S, Jagadeesh
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Abstract:
As in case of Aircrafts the control surfaces helps the aircrafts in maneuvering. Where as in Helicopters swash plates does the work of control surfaces. Helicopters are the one of the most complex machines present in the world. With advancement in technology it becomes a need to reduce complexity and weight of this machine. The purpose of the swash plate is to convert stationary control inputs from the pilot into rotating inputs which can be connected to the rotor blades or control surfaces. The conventional Swash plates are bulky and becomes a major problem for aerodynamics of helicopters. In this paper a design of swash plate is discussed. In major it consists of two main parts: stationary plate and a rotating plate.The whole assembly is placed inside the main rotor mast (which is hollow from inside) and connected to the cyclic and collective controls by a series of push rods. The whole assembly is not connected to the rotor mast at any point and can tilt in all directions and move vertically. The rotating swash plate is mounted to the stationary swash plate by means of a thrust bearing. It is connected to the rotor blades by drive links and must rotate in constant relationship with the rotor blades. Both swash plates tilt and slide up and down as one unit. A tap is introduced to keep both the plates and bearing intact.
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