Wind Tunnel Calibration of a Hemispherical Head Angle of Attack and Angle of Sideslip Indicator

摘要

A hemispherical head with 5 pressure taps at 45 deg in 2 planes was manufactured and calibrated at appropriate angles of incidence for actual Mach numbers, to indicate angle of attack and angle of sideslip in a flight test. Calibration results, direct test results and final calibration equations to be used in flight are given. Reynolds number dependence was explored and error analysis carried out.