ALTERNATOR CHECK.
Prior
to flights where
verification
of
proper alternator
and voltage
regulator
operation
is
essential
(such
as
night or
instrument
flights), a
positive
verification
can
be
made by loading the
electrical system
momen-
tarily
(3
to
5
seconds) with the landing light during the engine runup
(1700
RPM). The
ammeter
will
remain
within a needle width
of
zero
if the
al-
ternator
and voltage
regulator are
operating
properly.
TAKE-OFF.
It
is
important to check
full-throttle
engine operation
early
in the
take-
off
run.
Any
signs
of
rough engine operation
or
sluggish
engine
accelera-
tion
is
good
cause
for
discontinuing the
take-off.
Full
throttle
runups over loose
gravel are especially harmful
to
propeller tips.
When
take-offs
must be made over a
gravel surface, it is
very
important that the
throttle
be advanced slowly. This allows the
air-
plane to
start
rolling
before high RPM
is
developed, and the
gravel
will be
blown
back
of
the
propeller rather
than pulled into
it.
Most engine
wear occurs from improper operation
before the engine
is up to
normal
operating
temperatures,
and operating at high powers
and
RPM's.
For this reason
the
use
of
maximum power
for take-off
climb
should be
limited
to
that
absolutely
necessary for
safety.
Whenever
possible,
reduce
take-off
power to
normal
climb power.
Normal
take-offs
are
accomplished with wing flaps 0° to 20°,
cowl
flaps
open,
full
throttle,
and 2600
RPM. Reduce power to
23
inches
of
manifold
pressure
and
2450
RPM as soon
as practical
to minimize engine
wear.
Using
20° wing
flaps reduces the ground run
and
total distance over
the obstacle by approximately
20
per
cent. Soft field
take-offs
are
per-
formed with
20°
flaps
by
lifting the
airplane
off
the ground as soon
as
practical in
a slightly
tail-low
attitude.
However, the
airplane
should
be leveled
off
immediately to
accelerate
to
a
safe climb speed.
’
If
20°
wing flaps
are
used
for take-off,
they should
be
left
down
until all obstacles are cleared.
To
clear
an obstacle with wing flaps
20
degrees,
an obstacle
clearance
speed
of 60 MPH
should
be
used.
If no
obstructions are
ahead, a
best
"flaps
up'' rate-of-climb
speed
2-12
Summary of Contents for 182 1973
Page 3: ......
