Piper Malibu PA-46-310P Pilot Operating Handbook page 146

SECTION 5
PERFORMANCE
(d) Descent
PIPER AIRCRAFT CORPORATION
PA-46-JIOP, MALIBU
The descent data will be determined prior to the cruise data to .,....-_
provide the descent distance for establishing the total cruise
'-.,I
distance.
Utilizing the cruise pressure altitude and OAT, determine
the basic time. distance and fuel for descent ( Figure 5-27). 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-
27). 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 descent segment of the
flight plan.
The values obtained by proper utilization of the graphs for the
descent segment of the example are shown below.
(I) Time to Descend
( 18 min. minus 3 min.) 15 min*
(2) Distance to Descend
(60 nautical miles minus
7 nautical miles) 53 nautical miles*
(3) Fuel to Descend
(3.5 gal. minus 1.0 gal.) 2.5 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 appro-
priate Teledyne Continental Operator's Manual and the Cruise
Performance Table (refer to page 5-22) 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 Speed Vs. Altitude
(Figure 5-21 ).
*reference Figure 5-27
REPORT: VB-1200
5-6
ISSUED: JANUARY II, 1984