Page 1-5
Pilot’s Operating Manual
Original Issue: Feb, 2002
Sub-section 1
GENERAL
Hawker 800XP Pro Line 21
Section IV - FLIGHT PLANNING DATA
DETERMINATION OF SPEED and TEMPERATURE CORRECTION
Figure 2 allows true values of Mach number, airspeed, and outside air temperature to be determined
from indicated values of airspeed, altitude and temperature.
The true Mach number obtained will differ from indicated Mach number by the magnitude of the position
error given in Sub-section 5.05 of the Aircraft Flight Manual.
The chart assumes zero instrument error. In practice, the allowable tolerances on the altimeter and
combined speed indicator are such that there may be discrepancies of up to 0.01 Mach number or 3
knots airspeed in instrument readings. This should be considered when using the charts and the
tabulated cruise enroute data in Sub-section 4.