Question

Q 1) a) An aircraft air data sensor provides velocity information (u, v, w) = (40, 10, 10)ms?!. Calculate the angle of attack and sideslip angle. b) An air data probe is used to find air speed and angle of attack ? and sideslip ? information. The probe is calibrated in a wind tunnel running at speed V using a mount that provides Euler yaw ? and pitch ? angle deflections in any sequence. The probe has aircraft axes, and in the calibration sequence the process starts off with the probe x axis pointing upstream with zero angle of attack and sideslip. The intention is that the probe angle is set by yaw then pitch deflection, but during a calibration procedure the operator incorrectly moves the probe in a pitch then yaw deflection. Use Euler yaw-pitch and pitch-yaw transforms to explain the differences in the angle of attack and sideslip angles from the two approaches, and when are the differences negligible? c) Wind tunnel test data for assessment of an aircraft model aerodynamic forces are in table Q1. The model is set to its test attitude in an Euler yaw-pitch-roll sequence, and the force sensor measures forces X?, Y? and Z? in body axis directions. Calculate the angle of attack and sideslip from the yaw-pitch-roll data, and hence calculate the lift, drag and side forces from the body force data. Table Q1: Measured body force data for question 1. yaw [deg] pitch [deg] roll [deg] X? [N] Y? [N] Z? [N] 15 25 -40 -4.30 -4.00 -26.00

          Q 1)
a) An aircraft air data sensor provides velocity information (u, v, w) = (40, 10, 10)ms?!. Calculate the angle of attack and sideslip angle.
b) An air data probe is used to find air speed and angle of attack ? and sideslip ? information. The probe is calibrated in a wind tunnel running at speed V using a mount that provides Euler yaw ? and pitch ? angle deflections in any sequence. The probe has aircraft axes, and in the calibration sequence the process starts off with the probe x axis pointing upstream with zero angle of attack and sideslip. The intention is that the probe angle is set by yaw then pitch deflection, but during a calibration procedure the operator incorrectly moves the probe in a pitch then yaw deflection. Use Euler yaw-pitch and pitch-yaw transforms to explain the differences in the angle of attack and sideslip angles from the two approaches, and when are the differences negligible?
c) Wind tunnel test data for assessment of an aircraft model aerodynamic forces are in table Q1. The model is set to its test attitude in an Euler yaw-pitch-roll sequence, and the force sensor measures forces X?, Y? and Z? in body axis directions. Calculate the angle of attack and sideslip from the yaw-pitch-roll data, and hence calculate the lift, drag and side forces from the body force data.
Table Q1: Measured body force data for question 1.
yaw [deg] pitch [deg] roll [deg] X? [N] Y? [N] Z? [N]
15 25 -40 -4.30 -4.00 -26.00

Q 1)
a) An aircraft air data sensor provides velocity information (u, v, w) = (40, 10, 10)ms?!. Calculate the angle of attack and sideslip angle.
b) An air data probe is used to find air speed and angle of attack ? and sideslip ? information. The probe is calibrated in a wind tunnel running at speed V using a mount that provides Euler yaw ? and pitch ? angle deflections in any sequence. The probe has aircraft axes, and in the calibration sequence the process starts off with the probe x axis pointing upstream with zero angle of attack and sideslip. The intention is that the probe angle is set by yaw then pitch deflection, but during a calibration procedure the operator incorrectly moves the probe in a pitch then yaw deflection. Use Euler yaw-pitch and pitch-yaw transforms to explain the differences in the angle of attack and sideslip angles from the two approaches, and when are the differences negligible?
c) Wind tunnel test data for assessment of an aircraft model aerodynamic forces are in table Q1. The model is set to its test attitude in an Euler yaw-pitch-roll sequence, and the force sensor measures forces X?, Y? and Z? in body axis directions. Calculate the angle of attack and sideslip from the yaw-pitch-roll data, and hence calculate the lift, drag and side forces from the body force data.
Table Q1: Measured body force data for question 1.
yaw [deg] pitch [deg] roll [deg] X? [N] Y? [N] Z? [N]
15 25 -40 -4.30 -4.00 -26.00

Added by Leah B.

Question

Please give Ace some feedback