Piper SENECA III - Climb; Cruising

PIPER
AIRCRAFT
CORPORATION
SECTION 4
PA-3&220T,
SENECA III
NORMAI PROCEDURES
4.35
CLIMB
On
climb-out
after
takeoff,
it
is
recommended
that
the
best angle
of
climb
speed (76
KIAS)
be
maintained
only
if obstacle
clearance
is
a
consid-
eration. The
best
rate
of climb
speed
(92 KIAS)
should
be
maintained
with
takeoff
power
on
the
engines
until
adequate
terrain
clearance
is
obtained.
At
this
point.
engine
power
should
be
reduced
to
approximately
75%
power
for
cruise
climb.
A
cruise
climb speed
of
102 KIAS
or
higher
is
also
recom-
mended.
This
combination
of reduced
power
and
increased
climb
speed
provides better
engine
cooling,
less
engine
wear,
reduced
fuel
consumption,
lower
cabin
noise
level,
and better
forward
visibility.
When
reducing
engine
power
the throttles
should
be
retarded
first,
followed by
the
propeller
controls.
The
mixture
controls should
remain
at
full
rich
during
the
climb.
Cowl flaps
should
be
adjusted
to
maintain cylinder
head
and
oil
temperatures
within
the
normal
ranges
specified
for
the
engine.
During
climbs
under
hot
weather
conditions,
it
may
be
necessary
to
use
LO
auxiliary
fuel
pump
for
vapor
suppression.
Consistent
operational
use
of cruise climb
power
settings
is
strongly
recommended
since
this
practice
will
make
a
substantial contribution
to
fuel
economy
and
increased
engine
life, and will
reduce
the
incidence
of
premature
engine
overhauls.
4.37
CRUISING
When
leveling
off
at
cruise
altitude,
the
pilot
may
reduce
to
a
cruise
power
setting
in
accordance
with
the
Power
Setting
Table
in
this handbook.
For
45.
55
and
65%
power
the
mixture
should
be
leaned
to
25°
rich
of
peak
E.G.T.
but
not
to
exceed
1650°F
E.G.T.
For 75%
power
the
mixture
should
be
leaned
to
14.5
G.P.H.
but
not
to
exceed
1525°F
E.G.T- The
mixture
should
be
full
rich
at
powers
above 75%.
For
maximum
engine
service
life,
cylinder
head
temperatures
should
be
maintained
below
420°F
and
oil
temperatures
below
200°F
during
cruise.
These
temperatures
can
be
maintained
by
opening the
cowl
flaps,
reducing
the
power,
enriching the
mixture
or any
combination
of
these
methods.
ISSUED:
JANUARY
8,
1981
REPORT: VB-1110
4-29