Evaluation of a Pneumatic Valving System for Application to a Circulation Control Rotor.

摘要

A cam-type pneumatic valving system has been developed to provide helicopter rotor control/trim forces. This valving system provides both first and second harmonic rotor control by means of modulating both blade pressures and mass flow rates. Data are presented for (1) constant,one-per-rev,and two-per-rev air modulation, (2) constant and tapered slot distributions, (3) two pipe volumes,and (4) three cam-nozzle gap distances. The present study demonstrated that air pressure and mass flow rate can be modulated by means of a simple cam valve system. (Modified author abstract)