YAV-8B reaction control system bleed and control power usage in hover and transition | Zendy

Paul F. Borchers | Zendy; Ernesto Moralez | Zendy; V. K. Merrick | Zendy; Michael W. Stortz | Zendy

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YAV-8B reaction control system bleed and control power usage in hover and transition

Author(s) -

Paul F. Borchers,

Ernesto Moralez,

V. K. Merrick,

Michael W. Stortz

Publication year - 1993

Publication title -

nasa technical reports server (nasa)

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.1993-4841

Subject(s) - bleed , control (management) , computer science , power (physics) , power control , control system , engineering , electrical engineering , physics , artificial intelligence , business , advertising , quantum mechanics

Using a calibrated Rolls-Royce Pegasus engine and existing aircraft instrumentation and pressure taps, total and individual nozzle reaction control system (RCS) bleed flow rates have been measured on a YAV-8B Harrier during typical short takeoff, transition, hover, and vertical landing maneuvers. RCS thrust forces were calculated from RCS nozzle total pressure measurements, and control power was determined from the moments produced by these thrusts and the aircraft's moments of inertia. These data document the characteristics of the YAV-8B RCS with its basic stability augmentation system (SAS) engaged. Advanced control system designs for the YAV-8B can be compared to the original SAS based on the total bleed use and the percentage of available bleed used. In addition, the peak and mean values of the bleed and control power data can be used for sizing the reaction controls for a future short takeoff and vertical landing (STOVL) aircraft.

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