Piper CHEROKEE D - Page 36

SECTION 111 CHEROKEE "D"
OPERATING TIPS
The following Operating Tips are of particular value in the
operation of the Cherokee.
1. Learn to trim for take-off so that only a very light back
pressure on the wheel is required to lift- the airplane off the
ground. ·
2. The best speed for take-off is about 60 MPH under normal
conditions. Trying to pull the airplane off the ground at too low
an
airspeed decreases the controllability of the airplane in event
of engine failure.
3. Flaps may be lowered at airspeeds up to 115 MPH. To
reduce flap operating loads, it is desirable to have the airplane
at a slower speed before extending the flaps.
4. Befcre attempting to reset any circuit breaker, allow a
two
to five minute cooling off period. ·
5. Before starting the engine, check that all radio switches,
light switches, and the pitot heat switch are in the off position
so as not to create an overloaded condition when the starter is
engaged.
6. The overvoltage relay is prqvided to protect the elec-
tronics e.quipment from a momentary overvoltage condition (ap-
proximately 16.5 volts and up), or a catastrophic regulator failure.
In the event of a momentary condition, the relay will open and
the ammeter will indicate "0" output from the alternator. The
relay may be reset by switching the master. switch to "OFF" for
approximately one minute
and then returning the master switch to
"ON." If after recycling the master switch the condition persists,
the flight may be continued on battery alone by monitoring the
voltmeter and reducing battery load to a minimum.
7. The . vacuum gauge
is provided to mocitor the pressur~
.available to assure the correct operating speed of the vacuum driven
gyroscopic flight instruments.
It also monitors the condition of the
common air filter by measuring the flow of air through the filter ...
. If the vacuum gauge registers lower than 5" ± .10" Hg at 2000
RPM, the following items should be checked before flight:
a. Common air filter, could
be dirty or restricted.
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