Learjet 60 - Cruise Performance; High-Speed Cruise

Learjet 60

Pilot's Manual
CRUISE
PERFORMANCE
The cruise
performance on the following pages is based on flight test
data and represents the
average delivered aircraft .
NORMAL CRUISE
The
Normal Cruise tables (Figure 8-10) provide
fuel flows and true
airspeed
for constant 0 .76 MI cruise at weights
from 14,000 to 23,000
pounds . Engine
power is adjusted to maintain constant
Mach as
weight decreases .
Standard and off-standard day temperatures pro-
vide interpolation factors .
MAXIMUM SPECIFIC
RANGE
Figure 8-11 presents a
graphic description of the range
capability at
ISA as a function
of weight and altitude . The data is
based upon two-
engine, maximum-range
cruise at ISA . In general,
the cruise altitude
selected should be
near the maximum nautical
miles per pound fuel
for a given aircraft
weight .
MAXIMUM-RANGE
CRUISE - TWO ENGINES
The Maximum-Range
Cruise - Two-Engine
tables (Figure
8-12) pro-
vide fuel
flow, indicated Mach or
airspeed, and true
airspeed for
100% maximum
range cruise at
weights from 14,000
to 23,000
pounds . Standard
and off-standard
day temperatures
provide inter-
polation factors .
LONG-RANGE
CRUISE - TWO
ENGINES
The Long-Range
Cruise -
Two-Engine tables
(Figure 8-13) provide
fuel flow,
indicated Mach or airspeed,
and true
airspeed for 99% max-
imum range
cruise at weights
from 14,000 to 23,000
pounds . Standard
and off-standard
day temperatures
provide
interpolation factors .
HIGH-SPEED CRUISE
The High Speed
Cruise tables
(Figure 8-14)
provide fuel flows,
indi-
cated Mach or
airspeed, and true
airspeed for a
MMo/VMo or VMAX
cruise at weights
from 14,000 to 23,000
pounds .
Power for maximum
speed cruise
is for the limiting
condition (MMo/VMo,
or maximum
cruise power) .
Standard and
off-standard day
temperatures provide
interpolation factors .
PM-123
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8-27
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