Determination of YAV-8B Reaction Control System bleed flow usageUsing a calibrated Rolls-Royce Pegasus engine, total 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. Using existing aircraft instrumentation and pressure taps located in the RCS ducts, bleed flow rates at each RCS valve were also measured directly during flight and ground tests. These data were compared with the calibrated engine data and with the RCS part of a YAV-8B mathematical model used in piloted simulation at NASA Ames Research Center. Areas of disagreement were small, being confined to the estimation of closed RCS valve leakages and the modeling of the RCS butterfly valve pressure losses.
Document ID
19930029333
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Borchers, Paul F. (NASA Ames Research Center Moffett Field, CA, United States)
Moralez, Ernesto, III (NASA Ames Research Center Moffett Field, CA, United States)
Merrick, Vernon K. (NASA Ames Research Center Moffett Field, CA, United States)
Stortz, Michael W. (NASA Ames Research Center Moffett Field, CA, United States)
Eames, David J. H. (Rolls-Royce, Inc. Atlanta, GA, United States)