Piper Arrow PA-28R-201 Pilot Operating Handbook page 106

SECTION 5
PERFORMtNCE
5.5 FLIGHT PLANNING
values from the graph (Figure 5-35). Subtract the values obtained
obtained from the fieldconditions from the values obtained from the
cruise conditions to find the true fuel, time and distances 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) Fuel to Descend
(1.0 gal. minus 0.5 gal.)
(2) Time to Descend
(7 mm. minus 3 mm.)
(3) Distance toDescend
(18 naut.miles minus
7.5 naut. miles)
(e) Cruise
Using the totaldistance to be traveled during the flight, subtract
the previously calculated distance to climb and distanceto descend
to establish the total cruise distance. Refer to the Power
Table (Figure 5-23 or 5-23a) when
setting. The established pressure altitude and temperature values
and the selected cruise power
the true airspeed
(Figure 5-25 through 5-27c).
For this example, 65%
Calculate the cruise flow for the cruise power
information provided by the Best Economy
5-3 là).
The cruise time is found by dividing the cruise distance by the
cruise speed and the cruise fuel is found by multiplying the cruise
fuel flow by the cruisetime.
The cruise calculations establishedfor the cruise segment of the
flight planning example are as follows:
(1) Total Distance
(2) Cruise Distance
(e)(1) minus (c)(5) minus (d)(3),
(130 naut.miles minus 11 naut.
miles minus 10.5naut. miles)
*reference Figure 5-35
REPOIU VB-1612
5-6
HB-PQY, Page: 5-6-(0)
EXAMPLE
(continued)
selecting the cruise power
should now
from the appropriate
Cruise at2500 RPM
Economy
Issued: JULY 12, 1995
ARROW
PA-28R-201,
0.5 gal.*
4 min.'
10.5 naut.miles*
Setting
be utilizedto determine
Power
Speed graph
was used.
setting from
chart (Figure
Range
130 naut. miles
108.5 naut.miles
ISSUED:
JULY 12, 1995
the
5-6