TM 55-1510-219-10
Figure 7-1. Accelerate-Go Flight Path
7-9. FLIGHT PLANNING.
Calculations for flight time, block speed, and fuel
requirements for a proposed flight, are detailed below
using the same conditions presented in paragraph 7-2,
and a takeoff weight of 12,000 pounds:
DEN
Pressure Altitude ...................................... 5003 feet
FAT ................................................................. 28°C
ISA Condition ..........................................ISA +23°C
DEN-SLC
Pressure Altitude ....................................22,000 feet
FAT ................................................................ -20°C
ISA Condition ..........................................ISA +27°C
SLC-RNO
Pressure Altitude ....................................22,000 feet
FAT ................................................................ -12°C
ISA Condition ........................................ISA + 1 7°C
RNO
Pressure Altitude ...................................... 4502 feet
FAT ................................................................. 32°C
ISA Condition ..........................................ISA +27°C
Enter the TIME, FUEL, AND DISTANCE TO
CLIMB Graph at 28°C to 5003 feet, and to 12,000
pounds, and enter at -2°C to 22,000 feet, and to 12, 000
pounds, and read:
Time to Climb . .......... 18.4 -2.2 = 16.2 = 16 minutes
Fuel Used to Climb ................ 248 -45 = 203 pounds
Distance Traveled .............. 50 -7 = 43 nautical miles
Enter the TIME, FUEL, AND DISTANCE TO
DESCEND Graph at 22,000 feet, and enter again at
4502 feet, and read:
Time to Descend ........ 14.7 -3.1 =11.6 = 12 minutes
Fuel Used to Descend ........... 162 -39 = 123 pounds
Distance Traveled . .......... 67 -12 = 55 nautical miles
An estimated average cruise weight of 11,200 pounds
was used for this example.
Enter the tables for MAXIMUM ENDURANCE
POWER @ 1700 RPM for ISA + 10°C, ISA +20°C, and
ISA + 30°C, and read the cruise speeds for 22, 000 feet
at 12,000 pounds and 11,000 pounds:
Interpolate between these speeds for ISA +27°C
and ISA + 17°C at 11,200 pounds:
7-3
