AlphaSim C-5 Galaxy Procedures

Please see the Reference for explanations of the panel functions.

For performance and aircraft specifications see the aircraft menu.

Advanced/Simple Flight Models

This aircraft comes with a simplified flight model which limits the total aircraft weight to approximately 570,000 pounds by reducing the total amount of fuel available.  It also is configured to have electric power always available.  An advanced flight model is available in the "ADVANCED" folder which enables a full fuel load and allows for electrical failures.  Copy the files named "aircraft.cfg" and "c5.air" from the "ADVANCED" folder into the main aircraft folder, overwriting the existing files of the same name, to enable the advanced flight model.  With the advanced flight model, the electric power will drain very quickly if the engines are off or the generators are shut down.  The aircraft will also be very heavy so keep this in mind during takeoffs; the rotation speed is about 135 KIAS at 680,000 pounds.  See the Reference for a complete explanation of the Advanced Flight Model.

Wing Flaps/Slats

The wing flaps/slats have six positions:

  1. UP (0%)
  2. Maneuvering (8 degrees/20 percent)
  3. Intermediate I (16 degrees/40 percent)
  4. Intermediate II (25 degrees/62.5 percent)
  5. Takeoff (32 degrees/80 percent)
  6. Landing (40 degrees/100 percent)

The wing flaps take 29 seconds to extend.  The slats work in conjunction with the wing flaps switch but take only 11 seconds to extend.  The slats cannot be controlled separately.  (Flap extension times are uniformly 5 seconds for the simple flight model).

Power Schedule

Set power quickly by using the mouse to determine your exact percentage of throttle opening, which will correspond to the N1 rpm values in the table.  The settings will differ depending on altitude.  Use these tables as a guideline to help determine approximate throttle settings quickly.

Throttle setting, percent N1 RPM, Sea level N2 RPM, Sea level Scheduled power
0% 17% 61% Idle
76% 85% 95% Min cruise
82% 90% 97% Norm cruise
89% 97% 99% Normal Takeoff
100% 106% 102% Maximum

 

Throttle setting, percent N1 RPM, 25,000 feet N2 RPM, 25,000 feet Scheduled power
0% -- -- Idle
73% 85% 90% Min cruise
91% 95% 94% Norm cruise
100% 99% 95% Maximum

Engine Start

Use Ctrl-E (autostart) to start the aircraft, or use the "Autostart" switch on the electrical panel popup.  This will start all four engines in sequence.

Takeoff and Climb (680,000 lbs.)

Instrument Takeoff and Climb (680,000 lbs.)

Cruising (710,000 lbs.)

Use autopilot/autothrottle to set cruise parameters.  The aircraft takes several minutes to reach cruising speed after reaching cruising altitude.
Altitude Airspeed Fuel Consumption Naut. miles/1000 lbs
25,000 feet 0.77 Mach/336 KIAS  22,500 pounds/hour 20.7

Normal Descent

A typical enroute descent profile is conducted at 300 KIAS/Mach 0.77 with the airplane in clean configuration.  Set descent rate to 1500 fpm with a throttle setting of 90% N1 as an initial setting for descent from 25,000 feet at a weight of 700,000 lbs.  For quicker descents, set power and descent rate as desired, using spoilers as necessary.  For emergency descents, use maximum spoilers with flaps and gear extended as desired while keeping the airspeeds within posted limits.

Landing (620,000 pounds)

Landing (375,000 pounds)

ILS Approach (620,000 pounds)

The actual C-5A/B manual was used to create this flight model, aircraft panel and procedures.  The procedures have been condensed and modified for use in Flight Simulator.  Certain liberties have been taken with the panel design to best utilize the limited space available.