Flight Manual STEMME S6
Doc.-No.:P400-006.000 E
Page: 5-6
Revision: ---
Date of Issue: 07. October 2008
Agency approved
Date of Rev.: --.--.----
5.3.2
Pressure Altitude and Density Altitude
The flight performance of the aircraft depends on the air density or density
altitude. To determine the density altitude, the following diagram can be used.
(This may be needed to determine the engine power.) If the QNH is known (this
can be read from the altimeter), the density altitude can be calculated with the
temperature.
Diagram for converting pressure altitude and density altitude:
Illustration 5-2: Conversion of Pressure Altitude and Density
Altitude
Note:
The current pressure altitude is shown on the altimeter if it is
set to 29.92 in Hg / 1013.25 hPa.
Temperature
P
res
s
ur
e
A
lt
it
ude
[m
]
D
ens
it
y
A
lt
it
ude
[f
t]
D
ens
it
y
A
lt
it
ude
[
m]
P
res
s
ur
e
A
lt
it
ude
[f
t]