150
140
130
120
160
150
140
130
120
TRUE AIRSPEED ~ KTS
110
110
100
100
30
30
10
10
0 1020304050607080
TORQUE PER ENGINE ~ % TORQUE PER ENGINE ~ %
AA0443A
DATA BASE: FLIGHT TEST SA
Change 4 7-125
CRUISE CRUISE
CLEAN CONFIGURATION T700 (2) 20000 FT
PRESS ALT: 20000 FT
TRUE AIRSPEED ~ KTS
180 170 160 150 140
130
120 110 100
90
80
70
60 50 40 30 20 10 0 0 10
2030 405060 TORQUE PER ENGINE ~ %
170 160 150 140
130 120 110 100 90 80 70 60 50 40 30 20
10 0
70 80
AA0446
SA
CRUISE
PRESS ALT: 20000 FT
.50oC .40oC
TOTAL FUEL FLOW ~ 100 LB/HR IAS ~ KTS TOTAL FUEL FLOW ~ 100 LB/HR
2 3 4 5678910 2 3 4 5678910
150
TRUE AIRSPEED ~ KTS
150
140
TRUE AIRSPEED ~ KTS
140
130
130
120
110
100
120
110
100
60
60
30
30
10
10
0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80
TORQUE PER ENGINE ~ % TORQUE PER ENGINE ~ %
DATA BASE:FLIGHT TEST Figure 7-28. Cruise High Drag -Pressure Altitude 20,000 Feet (Sheet 1 of 4) SA AA0587
7-127
CRUISE
PRESS ALT: 20000 FT
.30OC.20OC
TOTAL FUEL FLOW ~ 100 LB/HR IAS ~ KTS TOTAL FUEL FLOW ~ 100 LB/HR 2 3 4 5678910 2 3 4 5678910
160
TRUE AIRSPEED ~ KTS
150
140
130
120
110
TRUE AIRSPEED ~ KTS
150
140
130
120
110
100
100
50
50
30
30
10
10
0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80
TORQUE PER ENGINE ~ % TORQUE PER ENGINE ~ %
DATA BASE:FLIGHT TEST Figure 7-28. Cruise High Drag -Pressure Altitude 20,000 Feet (Sheet 2 of 4) 7-128 SA AA0588
CRUISE
PRESS ALT: 20000 FT
.10OC 0OC
TOTAL FUEL FLOW ~ 100 LB/HR IAS ~ KTS TOTAL FUEL FLOW ~ 100 LB/HR
2 3 4 5678910 2 3 4 5678910
170
160 150 140 130 120
TRUE AIRSPEED ~ KTS
110
TRUE AIRSPEED ~ KTS
100
90
80
70
60
90
90
50
40
70
70
30
20
40 40
30 30
10
20 20
10 10
0
0
0
0 10203040506070800 1020304050607080 TORQUE PER ENGINE ~ % TORQUE PER ENGINE ~ %
AA0589
DATA BASE:FLIGHT TEST SA
CRUISE PRESS ALT: 20000 FT
90
50
170 160 150 140 130 120 110
180 170
INDICATED AIRSPEED ~ KTSTRUE AIRSPEED ~ KTS
160 100
150 140 130
90
80
120
110 100 70
60
80
40
70
30
60
50
20
40
30
20
10 10 0
0
TORQUE PER ENGINE ~ %
AA0590
DATA BASE:FLIGHT TEST SA
Figure 7-28. Cruise High Drag -Pressure Altitude 20,000 Feet (Sheet 4 of 4)
Section V OPTIMUM CRUISE
7.20 OPTIMUM RANGE CHARTS.
This section presents a method to optimize cruise per-formance for long range missions when the altitudes .own are not restricted by other requirements. The optimum alti-tude for maximum range chart (Figure 7-29) provides the pressure altitude at which to cruise to obtain the maximum possible range for any gross weight and FAT conditions.
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