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When leaning the mixture under some cruise conditions,
engine roughness may occur before peak EGT is reached. In this
case, use the EGT corresponding to the onset of roughness as the
reference point instead of peak EGT.
Changes in altitude or power setting require the EGT to be
rechecked. Mixture may be controlled in cruise descent by simply
enriching to avoid engine roughness. During prolonged descents,
maintain sufficient power to keep the EGT needle on scale.
idle descents or landing approaches, use full rich mixture.
idle descents or landing approaches at high elevations, the
mixture control may be set in a position to permit smooth engine
acceleration to maximum power.
TRUE AIRSPEED INDICATOR
A true airspeed indicator is available to replace the standard
airspeed indicator in your airplane.
has a calibrated rotatable ring which works in conjunction with the
airspeed indicator dial in a manner similar to the operation of a
flight computer.
TO OBTAIN TRUE AIRSPEED, rotate ring until pressure
altitude is aligned with outside air temperature in degrees
Fahrenheit.
Then read true airspeed on rotatable ring opposite
airspeed needle.
Pressure altitude should not be confused
with indicated altitude.
altitude, set barometric scale on altimeter to
"29.92" and read pressure altitude on
altimeter.
barometric scale to original barometric
setting after pressure altitude has been
obtained.
NOTE
To obtain pressure
Be sure to return altimeter
7-8
The true airspeed indicator
In
For
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