(c) Climb
The next step in the flight plan is to determine the necessary
climb segment components.
The desired cruise pressure altitude and corresponding cruise
outside air temperature values are the first variables to be
considered in determining the climb components from the Fuel,
Time and Distance to Climb graph (Figure 5-15). After the fuel,
time and distance for the cruise pressure altitude and outside air
temperature values have been established, apply the existing
conditions at the departure field to graph (Figure 5-15). Now,
subtract the values obtained from the graph for the field of
departure conditions from those for the cruise pressure altitude.
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 from the above
instructions in our flight planning example.
(1) Cruise Pressure Altitude 3300 ft.
(2) Cruise OAT 3°C
(3) Time to Climb (4 min. minus 1 min.) 3 min.
(4) Distance to Climb (5 miles minus 1 mile) 4 Miles*
(5) Fuel to Climb (.6 gal. minus .2 gal.) .4 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 5-31). 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
*reference Figure 5-15
PIPER AIRCRAFT CORPORATION SECTION 5
PA-38-112, TOMAHAWK PERFORMANCE
ISSUED: JANUARY 20, 1978 REPORT: 2126
REVISED: MAY 10, 1982 5-5
(c) Climb
The next step in the flight plan is to determine the necessary
climb segment components.
The desired cruise pressure altitude and corresponding cruise
outside air temperature values are the first variables to be
considered in determining the climb components from the Fuel,
Time and Distance to Climb graph (Figure 5-15). After the fuel,
time and distance for the cruise pressure altitude and outside air
temperature values have been established, apply the existing
conditions at the departure field to graph (Figure 5-15). Now,
subtract the values obtained from the graph for the field of
departure conditions from those for the cruise pressure altitude.
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 from the above
instructions in our flight planning example.
(1) Cruise Pressure Altitude 3300 ft.
(2) Cruise OAT 3°C
(3) Time to Climb (4 min. minus 1 min.) 3 min.
(4) Distance to Climb (5 miles minus 1 mile) 4 Miles*
(5) Fuel to Climb (.6 gal. minus .2 gal.) .4 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 5-31). 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
*reference Figure 5-15
PIPER AIRCRAFT CORPORATION SECTION 5
PA-38-112, TOMAHAWK PERFORMANCE
ISSUED: JANUARY 20, 1978 REPORT: 2126
REVISED: MAY 10, 1982 5-5
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