Piper SENECA III - Page 125

PIPER
AIRCRAFT
CORPORATION
SECTION 5
PA-34-220T,
SENECA
III
PERFORMANCE
The
remaining
values
are
the
true
fuel,
time
and
distance
components
for
the
climb
segment
of the
flight plan
corrected
for
field
pressure
altitude.and
temperature.
The
following
values
were
determined front the
above
instructions
in
the
flight
planning
example.
(1)
Cruise
Pressure
Altitude
16,500
ft,
(2)
Cruise OAT
-13°C
(3)
Time
to
Climb
(15
min.
minus
2
min.) 13
min.*
(4)
Distance
to
Climb
(27
naut.
miles
minus 3
naut.
miles)
24
naut.
miles*
(5)
Fuel
to
Climb
(12
gaL
minus
I
gal.) 11
gal.*
(d)
Descent
The
descent
data
will
be
determined prior
to
the
cruise
data
to
provide the
descent
distance
for
establishing
the
total
cruise
distance.
Utilizing the
cruise
pressure
altitude
and
OAT,
determine
the
basic
fuel,
time
and
distance
for
descent
(Figure 5-37). These
figures
must
be
adjusted
for the
field
pressure
altitude
and
temperature at
the
destination
airport.
To
find
the
necessary
adjustment
values,
use
the
existing
pressure
altitude
and
temperature
conditions
at
the
destination
airport
as
variables
to
find
the
fuel,
time
and
distance
values
from
the
graph
(Figure
5-37). Now,
subtract the
values
obtained
from
the
field.
conditions
from the
values
obtained
from
the
cruise
conditions
to
find
the
true
fuel, time and
distance
values
needed
for
the
flight.
plan.
The
values
obtained
by
proper
utilization
of the
graphs for
the
descent
segment
of
the
example
are
shown
below.
(l)
Time
to
Descend
(16.min,
minus 3
min.)
13
min.**
(2)
Dîstance
to
Descend
(44
naut.
miles minus
7
naut.
miles)
37
naut.
miles**
(3)
Fuel
to
Descend
(6
gat
minus
l
gal.)
5
gal.**
*reference
Figure
5-23
**reference
Figure
5-37
ISSUÈD: JANUARY 8,
1981
REPORT:
VB-1110
5-5