Aircraft Operating Instructions (AOI)
Type:
CT
Series:
CTLS
LSA
Page: 5-3
AU 010 11000
Revision No. 4
Date: 29 Apr 2008
An example is given in this diagram. Outside air temperature is -10°C (14° F.) and
the altimeter shows a (pressure) altitude of 8000ft.
Warning:
pressure altitude can be obtained with the reference pressure of the
altimeter set to standard atmosphere = 1013.25 hPa (=29.92 in Hg)
only.
The corresponding density altitude is 6800 ft or 2100 m. Performance values are thus
equivalent to those given in the next chapter for 2100 m. If the pressure altitude of
2400 m (8000 ft) were used, the performance figures would be wrong. This difference
can be very significant, particularly in the summer months when the density altitude is
much higher than the pressure altitude due to the higher temperatures.