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:
- UP (0%)
- Maneuvering (8 degrees/20 percent)
- Intermediate I (16 degrees/40 percent)
- Intermediate II (25 degrees/62.5 percent)
- Takeoff (32 degrees/80 percent)
- 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.)
- Make sure fuel supply is adequate for the intended
flight.
- Set elevator trim to neutral.
- Set flaps/slats to 32 degrees (80% - read this by
mousing over the flaps gauge or handle).
- Confirm spoilers are retracted.
- Line up aircraft on runway.
- Set brakes unless rolling takeoff is planned.
- Apply takeoff power smoothly (89% throttle, 97% N1)
- Release brakes when power is at 97% N1.
- Pull back on the stick slightly to lighten the nose at about
125
KIAS.
- Rotate smoothly at about 135 KIAS.
- 9,000 feet of runway are needed to lift off at this
weight.
- Retract landing gear once a positive rate of climb is established.
- Allow the aircraft to accelerate to 175 KIAS and
maintain that speed.
- Once the aircraft is at least 1,000 feet above the terrain, retract the
flaps.
- Set climb power to 90-95% N1 RPM, which roughly
corresponds to 81-86% throttle (use mouse to read this in the VC).
- Allow the aircraft to accelerate to the normal climb speed of
250 KIAS below 10,000 feet after flaps are retracted.
- Adjust rate of climb to maintain a total fuel flow of
30,000 pph during the climb.
- After passing through 10,000 feet with a climb rate of
about +500 fpm, accelerate to 270 KIAS.
- Maintain 270 KIAS until reaching Mach 0.7.
- Maintain Mach 0.7 until reaching cruising altitude.
Instrument Takeoff and Climb (680,000 lbs.)
- Make sure fuel supply is adequate for the intended
flight.
- Set elevator trim to neutral.
- Set flaps/slats to 32 degrees (80% - read this by
mousing over the flaps gauge or handle).
- Confirm spoilers are retracted.
- Set IAS hold speed value to 250 KIAS.
- Enter desired cruising altitude in altitude hold
window.
- Set heading to runway heading or as desired.
- Line up aircraft on runway.
- Set brakes unless rolling takeoff is planned.
- Engage TOGA (use keystroke or joystick button, no
button is available on the panel).
- Confirm Flight Director flags visible in Expanded Scale
ADI.
- Power will increase to 97% N1
automatically.
- Observe horizontal command bar rise to computed takeoff
pitch.
- Pull back on the stick slightly to lighten the nose at about
125
KIAS.
- Rotate smoothly at about 135 KIAS, aligning horizontal
command bar with miniature airplane in ADI.
- Retract landing gear once a positive rate of climb is established.
- After a stable 8-degree pitch is established, engage
autopilot master and wing leveler.
- TOGA will now hold the climb pitch at 8 degrees.
- Retract flaps when the aircraft is at least 1,000 feet above the
terrain.
- After sufficient altitude has been achieved, engage the
altitude hold and IAS hold.
- Engage heading hold or navigation commands (VOR, ADF, or GPS)
as desired.
- Complete climb as with normal takeoff.
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)
- Approach the field at about 215 KIAS in clean
configuration.
- Deploy flaps/slats to 40% on downwind and maintain 210
KIAS.
- Lower landing gear after flaps extension and check down/locked.
- On base leg, check flaps 40% and gear
down/locked. Maintain 200 KIAS.
- After turning on final, lower flaps to 100 percent and
maintain 165 KIAS.
- Over airfield boundary speed should be 160 KIAS.
- Best flare speed is 155
KIAS.
- Minimum touchdown speed is 150 KIAS.
- After touchdown extend spoilers fully.
- Brake as necessary after nose gear touches down.
Landing (375,000 pounds)
- Approach the field at about 215 KIAS in clean
configuration.
- Deploy flaps/slats to 40% on downwind and maintain 180
KIAS.
- Lower landing gear after flaps extension and check down/locked.
- On base leg, check flaps 40% and gear
down/locked. Maintain 150 KIAS.
- After turning on final, lower flaps to 100 percent and
maintain 125 KIAS.
- Over airfield boundary speed should be 120 KIAS.
- Best flare speed is 115
KIAS.
- Minimum touchdown speed is 110 KIAS.
- After touchdown extend spoilers fully.
- Brake as necessary after nose gear touches down.
ILS Approach (620,000 pounds)
- Approach airfield at the prescribed altitude and speed,
usually 2-3000 ft above field elevation.
- Tune ILS frequency on the NAV radio and make sure it is
active.
- On extended final, set autopilot ON and altitude hold
to the prescribed altitude.
- Turn on "Approach" hold (APR button on the
autopilot panel).
- Set IAS hold to desired speed if not already done.
- Aircraft should fly runway heading on localizer at the
altitude set in autopilot.
- When glideslope is intercepted, ALT hold light will go
out and aircraft will now follow the glideslope.
- IAS hold will automatically hold correct approach speed
of 165 KIAS.
- For weights lighter than 620,000 pounds, select
appropriate IAS hold speed value.
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.