A I R C R A F T
SA160
A I R C R A F T
A I R C R A F T
Symphony
SECTION 4
NORMAL PROCEDURES-OPERATION
4.2 TACHOMETER OPERATION
The tachometer system provides both a full sweep graphic analog
display and four place digital displays. When you start the engine you
will see the analog graph rise in proportion to the engine speed. Full color
range marks provide you with a quick reference to monitor normal,
caution and red line engine RPM.
The digital readout provides you with exact RPM information. The
resolution (or incremental steps) of the digital display is 10 RPM. For
example, the display might read '2400' and after you make a slight
increase in power, it would read '2410'. This is a definite advantage
over other digital tachs that read in less than 10 RPM steps. They
change so frequently that it becomes very distracting and annoying
to the pilot. We recommend using the digital display for RPM checks
and letting the engine stabilize for a minimum of three seconds
during the checks. The high accuracy of the tach will allow you to
follow long-term performance trends of your engine and prop, such
as static maximum rpm, carb heat effectiveness, and typical mag
drops. These can be important indicators of engine and accessory
condition.
Another feature is the 'engine hours counter'. When the engine is
off, the digital display reads the total accumulated engine hours to a
maximum of '5999.9'. Engine hours are accumulated any time RPM
is greater than 1500.
RPM:
Engine Operating Hours:
Feb 25, 2005
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