Piper Turbo Saratoga PA-32-301T Pilot's Manual page 112

SECTION
5
PIPER AIRCRAFT
CORPORATION
PERFORMANCE PA-32-301T,
TURBO SARATOGA
(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, distance and time 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,
distance and time 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, distance and
time 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.
(1)
Time to Descend
(12
min. minus 0.5 min.)
l 1.5 min*
(2)
Distance
to Descend
(32
nautical miles minus
1.5 nautical miles) 30.5
nautical
miles*
(3)
Fuel to Descend
(3.5
gal minus
0.1
gal.)
3.4 gal*
(e)
Cruise
Using
the total
distance to be traveled during the flight,
subtract the previously calculated distance to climb and distance to
descend
to
establish the
total cruise distance. Refer
to the
appropriate
Avco Lycoming
Operator's
Manual and the Power
Setting Table (Figure 5-25)
when selecting the cruise power setting.
The established
pressure
altitude and temperature values and the
selected cruise power should
now
be utilized to determine
the true
airspeed from the Cruise
Performance graph (Figure 5-27).
Calculate
the
cruise fuel consumption for the cruise power
setting from the information
provided
by
the Avco Lycoming
Operator's Manual.
*reference
Figure 5-37
REPORT:
VB-1070
ISSUED: JANUARY 10, 1980
5-6
REVISED: AUGUST
6,
1982