G-IV General and Limitations Flashcards
Steering Limits:
1) Steering Wheel Limits
2) Rudder Pedal Limits
3) Maximum Steering Angle
4) Minimum Taxi Strip Width For A 180 Degree Turn
1) 80 +/- 2 Degrees
2) 7 +/- 1 Degrees
3) 82 Degrees
4) 54.2 Feet (Based on a maximum nose wheel deflection of 80 degrees +2)
Steering Wheel Limits
80 +/- 2 Degrees
Rudder Pedal Limits
7 +/- 1 Degrees
Maximum Steering Angle
82 Degrees
Minimum Taxi Strip Width For A 180 Degree Turn
54.2 Feet
Based on a minimum nose wheel deflection of 80 degrees + 2
General Dimensions:
1) Length
2) Width (wingspan)
3) Height
4) HSTAB Width
5) Fuselage Outside Cross Section
6) Fuselage Inside Cross Section
7) Wing Dihedral
8) Wing Sweep Angle
1) 88 Feet 4 Inches
2) 77 Feet 10 Inches
3) 24 Feet 5 1/8 Inches (height will be higher with a SATCOM antenna installed on the top of the vertical fin)
4) 32 Feet
5) 94 Inches
6) 88 Inches
7) 3 Degrees
8) Approximately 27 Degrees
Aircraft Length
88 Feet 4 Inches
Aircraft Width (Wingspan)
77 Feet 10 Inches
Aircraft Height
24 Feet 5 1/8 Inches
height will be higher with a SATCOM antenna installed on top of the vertical fin
HSTAB Width
32 Feet
Fuselage Outside Cross Section Width
94 Inches
Fuselage Inside Cross Section Width
88 Inches
Wing Dihedral
3 Degrees
Wing Sweep Angle
Approximately 27 Degrees
How does the construction of the radome minimize lightening strike damage?
What is it constructed of?
It contains conductors.
It is constructed of fiberglass honeycomb.
Will there be any warning to the crew if there is improper main door and baggage door seal pressures?
On aircraft having ASC 439 incorporated, a door seal warning system is installed.
What keeps the main door closed?
6 sliding bayonets mechanically linked to the internal and external primary locking handles.
One bayonet activates the pressurization, and others control circuits within the hydraulic system and the “cabin doors” warning light in the cockpit.
Regarding the air stair door, how is proper bayonet seating ascertained?
By a triangular pattern of orange dot.
If orange dots are not visible, it is possible that the dot has worn off or that it is obscured by lubricant, etc. The orange dot pattern is painted over a notch on the bayonet. If the notch is visible, the bayonet is extended properly into its receptacle.
How many main entrance door lock switches are on the air stair door?
What are they for?
3
They are utilized to deactivate the auxiliary pump after the door is closed. The circuit is broken as the door is locked by the sliding bayonets physically actuating the doorlock switches.
Where does power for the control system of the airstair door come from?
By the essential DC bus through the DOOR CONT WARN circuit breaker located in the copilot’s overhead circuit breaker panel.
How do you close the door from outside the aircraft?
The external (guarded) battery switch is used to power the essential DC bus which will allow the OUTSIDE DOOR SWITCH to close the main door. CAUTION: After door is closed and locked, the external battery switch must be placed OFF to prevent a continuous drain on the battery.
On SNs 1156 and subsequent the essential DC bus is powered at the same time the outside door switch is activated so there is no need to use the outside battery switch.
What indications will there be if the external battery switch is left on?
Internal:
Blue EXT BATT SWITCH ON CAS message.
EXT BATT SW capsule on the overhead annunciator panel illuminated.
External:
Bottom beacon light will be on.
What keeps the baggage door closed?
4 Bayonets.
One controls the door sealing mechanism, and another controls the micro switch for the CABIN DOORS message.
How is the space between the panels on the fixed windows kept defogged?
By a desiccator system.
Regarding the wing tank design, how is corrosion prevented?
The tanks are over coated with polyurethane.
What is the output of each of the engine driven alternators?
115 VAC, 3 Phase, 30 KVA.
It is variable frequency (varies with engine power).
Therefore, it is sent to Variable Speed Constant Frequency (VSCF) converters (2) located in the aft compartment so the power can be stabilized and regulated.
The power to the converters is then rectified to DC (270 VDC POR).
Then it is converted back to controlled AC (115 VAC, 400 Hz, 3 Phase, 23 KVA).
There is also DC output from the converters (28 VDC, 250 Amps).
What engines are installed on the G IV?
2 Rolls Royce Tay 611-8 engines.
They are twin spool, axial flow bypass turbofans.
Regarding the aircraft engines, what does “Tay” mean, and why was it chosen for the name of the powerplant?
The River Tay is the longest river in Scotland and the seventh longest in the United Kingdom.
The use of river names (Trent, Nene, Avon, Tay, Conway, Spey, etc.) was introduced with the earliest Rolls jet engines to reflect their nature: a steady flow of power rather than the pulses of a piston engine.
Roll-Royce named their piston engines after birds if prey (e.g. Merlin, Peregrine, Kestrel, Vulture, and Buzzard).
What is the guaranteed minimum thrust rating of the main engines?
The Rolls-Royce Tay 611-8 engines have a guaranteed minimum thrust rating of:
13,850 lbs.
(ISA, Sea Level, Static)
What APU is installed on the G IV?
1) The Honeywell GTCP36-100[G]
- OR -
2) The Honeywell GTCP36-150[G] on some later air craft (ASC 465)
(The “G” simply stands for “Gulfstream”)
What are the hydraulic systems on the G IV?
1) Combined - powered by the left engine hydraulic pump.
2) Flight - powered by the right engine hydraulic pump (remember “flight is right”).
3) Utility - (PTU).
4) Auxiliary.
What conditions must be met for the utility pump to operate automatically when it is armed?
1) Combined system pressure less than 800 psi.
2) Flight system pressure more than 2000 psi.
3) Flight system fluid temp less than 220 degrees Fahrenheit.
4) Combined fluid is available.
Also, if flight system pressure falls below 1730 psi, the priority valve will close, causing utility pressure to go to zero. Placing the utility pump switch to ON will not restore the utility system.
How can the brake system be controlled from the cockpit?
Electrically or Hydraulically
- -The Brake by Wire (BBW) system uses an electrical signal to meter brake pressure.
- -The Hydromechanical Analog Brake (HMAB) system uses a hydraulic signal to meter brake pressure.
How is hydraulic power supplied to the brake system?
By the combined, utility or auxiliary system for both BBW and HMAB systems.
What controls the hydraulic stall barrier operation?
Angle of Attack inputs
What systems use bleed air?
Remember "TEA-PADS & Water" T = TAT Probe Aspirator. E = Engine Starter System. A = Air Conditioning (ECS Packs). P = Pressurization (ECS Packs). A = Anti-Ice (Cowl & Wing). D = Door Seal Systems. S = Servo Control Air. Water = Cabin Water System Pressure.
What engine stages provide bleed air?
7th or when needed 12th stage.
How are the cabin windows defogged?
By desiccant filters.
Where do the engine fire detection sensors monitor the engine temperatures?
They monitor the engine exterior temps in engine fire zone one, which comprises:
- Compressor,
- Combustion, and
- Turbine sections
How is engine fire extinguishing accomplished?
Through a two-shot, electrically fired chlorotrifluorobromomethane (CF3Br) system, consisting of two single-shot containers installed in the tail compartment.
How many pitot systems are on the aircraft?
Where are their sources or pitot tubes located?
3 Independent Systems
- 2 Primary: Pilot & Copilot.
- 1 Standby.
Pitot Locations:
- Pilot and Copilot: On top of the nose, forward of the windshield.
- Standby: Left side of nose below AOA probe.
How many static systems are on the aircraft?
Where are the static sources located?
4 Independent Systems
- 2 Primary: Pilot & Copilot.
- 1 Standby: Standby Altimeter and Airspeed Indicators.
- 4th System: Used by the cabin differential indicator on the overhead panel.
Static Sources:
- Each system has 2 sources (one on each side).
- Primary systems use upper ports, others use lower.
What type of capability does the autopilot provide?
The A/P uses 2 flight guidance computers to provide fail-operational capability.
What S/N aircraft changed from a G IV to either a G300 or a G400?
S/N 1500 & After
What is a G300 & G400?
G300: A production G IV-SP with ASC 436.
G400: A production G IV-SP with ASC 440.
Is the External BATT Switch required to be selected ON for door retraction?
On S/N 1000-1155: Yes.
On S/N 1156 and subsequent: No.
What bus is required to have electrical power for the NAV lights to work?
L Main AC
Which S/N G IV aircraft have the logo lights installed?
S/N 1280 and Later
Landing Light Limitation
Steady ON limited to 5 minutes duration on the ground.
Vmo / Mmo
S/N 1000 and subs. without ASC 61
- 340 KCAS to 28,000 feet.
- Mach .85 at 28,000 feet linear change to Mach .88 at 34,000 feet.
- Mach .88 from 34,000 feet to 43,500 feet.
- Mach .88 at 43,500 feet linear change to Mach .874 at 45,000 feet.
Vmo / Mmo
S/N 1000-1214 with ASC 61
- 320 KCAS to 30,000 feet.
- Mach .84 at 30,000 feet linear change to Mach .86 at 34,000 feet.
- Mach .86 from 34,000 feet to 43,500 feet.
- Mach .86 at 43,500 feet linear change to Mach .854 at 45,000 feet.
Flaps Extended Speeds
10 Degrees = 250 Kts. / .60 MT
20 Degrees = 220 Kts. / .60 MT
39 Degrees = 170 Kts. / .60 MT
(180 Kts. / .60 MT for S/N 1214 & subs. Or S/N 1000-1213 with ASC 190) (G IV-SP)
Gear Extended Speed
250 Kts. / .70 MT
Gear Doors Opened or Closed
Gear Extension / Retraction Speed
225 Kts. / .70 MT
Alternate Gear Extension Speed
175 KCAS
Maneuvering Speed (Va)
170 KCAS
206 KCAS
S/N 1214 and subs. Or ASC 190
Turbulence Penetration Speed
270 KCAS / .75 MT
Engine Airstart Envelope
Speed & Altitude
200-324 KCAS
25,000 Feet or Below
Manual Reversion Airspeed Limit
250 KCAS max
APU Inflight Start Envelope
Guaranteed Starting:
- Altitude: 15,000 Feet and Below
- Airspeed: 250 KCAS max
Guaranteed Running:
- Altitude: 30,000 Feet and Below
- Airspeed: Vmo / Mmo
Windshield Wipers Speed Limitation
200 KCAS
Tire Speed Limits
S/N 1000-1213 Without ASC 190/266
Nose Tires = 182
Main Tires = 182
Overall Limit = 182
Tire Speed Limits
S/N 1000-1213 With ASC 266
Nose Tires = 182
Main Tires = 195
Overall Limit = 182
Tire Speed Limits
S/N 1000-1213 With ASC 190
Nose Tires = 195
Main Tires = 195
Overall Limit = 195
Tire Speed Limits
S/N 1214 and Subsequent
Nose Tires = 195
Main Tires = 195
Overall Limit = 195
Wing Vortex Generator Not Installed
Speed Limitation
0.80 MT
Mach Trim / Electric Elevator Trim Inoperative
Speed Limitation
0.75 MT
Yaw Damper Inoperative Above 18,000 Feet
Maintain At Least What Airspeed?
220 KCAS
Reverse Thrust Cancellation
Initiate At What Airspeed?
70 KCAS
- For landing on contaminated runways:
- Both engines in max reverse above 70 KCAS.
- Both engines in reverse idle (reversers deployed) below 50 KCAS.
Thrust Reverser Deployed In-Flight Airspeed
200 KCAS
Vmca (Minimum control speed air)
104 KCAS
Vmcg (Minimum control speed ground)
111 KCAS
Maximum Ceiling
45,000 Feet
Max Altitude Yaw Damper Inop
41,000 Feet
Max Altitude with an Engine Bleed Air Switch Off
41,000 Feet
Max Altitude for an Inflight Engine Airstart
25,000 Feet
Max Gear Extended Altitude
20,000 Feet
Max Altitude for Flaps 39 Degrees
20,000 Feet
Max Takeoff and Landing Airport Elevation
15,000 Feet
Max Altitude for APU Start
Max Airspeed for APU Start
15,000 Feet
250 KCAS
APU Temp Limits During Start
36-100 APU
0% to 60% = 988 Degrees Celsius
60% to 100% = 821-732 Degrees Celsius (linear decrease)
Maximum Running = 732 Degrees Celsius
APU Temp Limits During Start
36-150 APU
0% to 50% = 973 Degrees Celsius
51% to 87% = 973-732 Degrees Celsius (linear decrease)
87% to 100% = 732 Degrees Celsius
Maximum Running = 732 Degrees Celsius
APU Max EGT Running
732 Degrees Celsius
APU Max EGT with APU Air On
680 Degrees Celsius