Z Bottom AH-1W Systems Flashcards
Fuel Limitations
1) Using JP-4 and FUEL CROSSFEED in AUTO
a) 0-2000 PA ->35 deg C
b) 2000-10000 PA -> 30 deg C
2) Above 10,000 PA (all fuels)
a) Boost Pumps Operating.
What does Hyd 1 power
1) fore and aft cyclic servo
2) lateral cyclic servo
3) collective servo
4) yaw SCAS actuator
5) tail rotor servo
Prohibited Maneuvers
1) No aerobatic maneuvers
2) Flight below 0.5 g’s
3) No practice autos to touchdown unless gross weight is 12,500 lbs or less and a qualified instructor designated for full autos by CO is in cockpit.
4) Practice autorotation entries from the shaded areas of the H-V diagram
5) No airstarts above 15,000 PA
6) Dual throttle chops above Vmc
7) Solo Flight from copilot/gunner cockpit
8) Do not exceed 65% Txmsn Q at airspeeds above Vh while in a dive.
Airspeed Limits
1) 190 Kts without stores
2) 170 kts with stores
3) 120 kts steady state auto
4) 35 kts sideward flight
5) 30 kts rearward flight
Minimum Crew
1 pilot
6 Functions of Marine Aviation
1) OAS
2) Assault Support
3) Anti-Aircraft Warfare
4) Electronic Warfare
5) Control of Aircraft and Missiles
6) Aerial Recon
Rotor Brake Limits
1) Do not apply above 60% Nr
2) Do not apply below 25% Nr
3) When feasible, release at appx 10% Nr to avoid sudden stoppage.
4) Do not move handle above the second detent while rotor is turning.
5) During rotor brake start, release brake within 25 seconds after 67% Ng is attained. Do not exceed idle rpm with rotor brake on.
6) No rotor brake start below -18 deg C.
External Power Limits
Limited to 26 to 29 Vdc, if outside this range it will be automatically disconnected. 600-1300 Amps.
Pulling FIRE PULL does what?
1) Shut off fuel to affected engine.
2) Deactivate ECU and rain removal circuits
3) Arm both fire extinguisher bottles.
Generators
(2) x 30 Volt, 400 Amp generators are installed on and driven by the combining gearbox. Fully powered when Nr reaches 70%.
VSS Accumulator Pressure
2,000 +/- 100 psi
Utility Hydraulic System Qty
3 pints
Hydraulic System #1 Qty and Type
9 pints MIL-PRF-83282
Hydraulic System #2 Qty and Type
15 pints
Main Rotor Hub Grip Oil Qty and Type
2.5 pints A-A-52039
Tail Rotor Gearbox Oil Qty and Type
4.5 pints DOD-PRF-85734
Intermediate Gearbox Oil Qty and Type
3.5 pints DOD-PRF-85734
Transmission Oil Qty and Type
20 Quarts (16 usable) DOD-PRF-85734
CBOX Oil Qty and Type
20 Quarts (14 usable) DOD-PRF-85734
Fuel Qty and Type
304 Gallons (298 usable)
Primary: JP-5/JP-8
Restricted: JP-4
Emergency: JP-8 + 100
Max Gross Weight
14,750 pounds
Engines
(2) x T-700-GE-401 Engines rated at 1,690 shp each at sea level on a standard day.
Compressor Compression Ratio
17-1
Battery Type and Rating
Nickel-Cadmium Battery 24 Volts 25 Amp-Hours
Sources of AC Power
1) Main Inverter: 115 VAC, 1,000 Volt-Amps, Single phase 400 Hz power for operating instruments and avionics.
2) Stby Inverter: 115 VAC, 750 Volt-Amps, three phase 400 Hz power for TOW and HELLFIRE missile system operation and emergency AC pwr.
What do charger monitors do?
Monitor battery voltage and temp.
What do voltage regulators do?
protect against overvoltage, undervoltage and reverse current situations. 28-29 Volts.
Max misalignment of flex couplings on main driveshaft
7 degrees
NTS/NTSU FLIR optical range
NTS: 8-12 micron
NTSU: 3-5 micron
Engine oil filter
1) Bypass Button Extends
2) Filter is Bypassed
3) # of Microns
1) 44-60psi
2) 60-80psi
3) 3 microns
Ng Limits
1) 102% max steady state
2) 105% max for 12 seconds
Engine Oil Temp
1) Normal
2) Transient
3) Max
1) 35-132 deg C
2) 132-150 deg C (30 min)
3) 150 deg C
Engine Torque Limits
1) Continuous
2) OEI
3) OEI Limit
1) 10-74%
2) 75-79% (2.5 min)
3) 79%
Hot Start
867 deg C before starter cutout
Engine Wash Starter Limits
1) 15 sec ON
2) 10 min OFF
Cycle can be repeated 3 additional times (4x total) which may be followed by an engine start.
Engine Starter Limits
1) 60 sec ON
2) 5 min OFF
3) 60 sec ON
4) 30 min OFF
Most Important Factor in Engine Durability
MGT
Engine Oil Qty and Type
7.3 quarts MIL-PRF-23699 or MIL-PRF-7808 if it is below -40 deg
Number of Chip Detectors
5 in TXMSN, 3 in CBOX, 1 in each engine
Reasons to abort start
1) Ng fails to reach 14% within 6 sec
2) MGT is not evident within 20 sec after initial indic of Ng
3) Oil pressure not indicated within 30 seconds after starter engagement
4) Np is not present within 30 sec after Ng has reached 67+/-3%
5) MGT reaches 867 deg C before starter cutout
Engine Oil Pressure
1) 20% min below 90% Ng
2) 30-100psi
3) 200 psi cold start max
MGT Limits
1) 400-801 deg C continuous
2) 801-867 deg C 30 min limit
MGT Limits OEI
1) 867-917 deg C 2.5 Min
2) 917-965 deg 12 sec
What does Hydraulic System #2 Power
1) Fore and Aft cyclic servo
2) Lateral Cyclic Servo
3) Collective Servo
4) Rotor Brake Control Unit
5) TOW pylon actuators
6) Fore and Aft SCAS actuator
7) Lateral SCAS actuator
8) VSS
9) Oil Cooler Fan (in SEC)
What does switching Oil Cooler to SEC do?
1) Disables Utility Hydraulic System
2) Disables VSS
FWD FUEL LOW and AFT FUEL LOW come on?
@9 deg nose low 680 and 95 pounds remaining
skids level 270 and 245 pounds remaining
RPM Warn light comes on?
1) 105 +/- 1 Nr
2) 96 +/- 1 Nr
3) 53 +/- 1 Ng
Main Rotor is preconed how much?
3 degrees
3 Conditions VSS is disabled
1) OIL COOLER in SEC
2) HYD 2 disabled
3) Rotor RPM not within limits. The OFF segment of VSS will illuminate.
When does VSS LIMIT light come on
VSS weight stroke exceeds 95% of electrical travel, goes off when decreasing to 85% or below.
Turret Designator
A/A 49E-7 (V4)
3 Reasons for BATT SYS
1) Cell imbalance 0.5 between cells (19)
2) Battery temp reaches 145 deg F
3) Charger Monitor reaches overtemp condition
Combining Gearbox Oil Temp
1) 0-110 deg C normal
2) 110 deg C max
EECU Outputs
1) MGT
2) Engine RPM (Np)
3) Engine Torque
EECU Inputs
1) Alternator
2) MGT Thermocouples
3) Np and Torque Sensors
4) Collective Anticipator
5) Nr Sensor
6) HMU
Combining Gearbox Oil Px
1) 25psi min
2) 70-90 psi normal
3) 90 psi max
TXMSN Oil temp
up to 110 deg C
TXMSN Oil Px
1) 30 psi min
2) 40-70 psi normal
3) 70 psi max
Dual HYD pressure range
1) 2900-3100 psi normal
2) 3200 psi max
2200-3200 psi op limits are for gauge pressure variations with control or SCAS inputs. Steady LOW or HIGH px readings are indicative of hyd system malf
On shutdown without a rotor brake the rotor could wind mill indef in winds above what speed?
35 knots
Hyd Filter Bypass extends at?
70 psi
What switch is in the ammo bay?
TOW Boresight Switch
Pressure refill rate and pressure
45 gpm at 55 psi
Dual Ammeter Limitations
1) Normal
2) Max Continuous
3) Cross-Start Max
1) 0-200 amps
2) 400 amps
3) 600 amps
1) Main Blade Length
2) T/R Blade Length
3) Total Helicopter Length
4) Skid Length
5) Skid Width
6) Main Blade Chord
7) T/R Chord
1) 48 ft
2) 9 ft 9 in
3) 58 ft
4) 12 ft 2 in
5) 7 ft
6) 2 ft 9 in
7) 12 in
TSU Coverage
1) +25 deg/-50 deg
2) 95 deg left 90 deg right
Fuel Filter
1) Bypass indicator button extends
2) Bypass valve opens
1) 9 +/- 1 psi
2) 20 +/- 2 psi
3 Functions of HMU
1) Positions the metered fuel output valve to assure proper fuel flow to the combustion section.
2) It positions a servo which actuates variable stator vane geometry and start bleed air components.
3) Amplifies various signals such as T2, P3 and Ng to influence fuel flow and variable geometry position.
3 Functions of ODV
1) Provides fuel to the main fuel manifold and twelve injectors during engine operation.
2) Returns fuel to the HMU high pressure pump if the Np overspeed sensor is energized.
3) During shutdown, it purges fuel in main fuel manifold overboard through a shutoff and drain valve.
of IR lights on IR ring
10
CBOX Oil Filter Bypass
30-35 psi
Anti-Icing Sources
1) Electrically heated bellmouth
2) Hot axial compressor discharge air flowing through swirl and inlet guide vanes.
3) Hot scavenge oil flowing through internal passages in scroll vanes.
SCAS Actuator Authority
1) 18.3 % Pitch
2) 27.4 % Roll
3) 31.1 % Yaw
Np Overspeed Protection
125 +/- 1.25 %
Alternator Powers?
1) Ng Signal Circuitry
2) EECU Circuitry
3) Ignition Circuitry
Main Rotor Speed
311 rpm
Tail Rotor Speed
1,460 rpm
Nr (Power Off) Limits
1) 84% transient min
2) 91-105% normal
3) 110% transient max
Nr (Power On) Limits
1) 99-100% Normal
2) 105% Max
3) 91% transient min
4) 110% transient max (10 sec)
Np Limits
1) 99-100 Normal
2) 60-75% Avoid
3) 97 +/- 0.5 to 103 +/- 0.5 ENGINE RPM wheel range.
TXMSN Torque
1) 10-85% Normal
2) 85-100% (30 min)
3) 100% Max
Lateral CG limits
6.0 Inches Left and Right of Centerline
