Transcript Slide 1

UNCLASSIFIED
INTRODUCTION to UH-60
CW5 Victor Figliuolo
Ops-O / AASF1-NY
SP / AASF1-NY
SP/ 42nd CAB
References
TM 1-1520-237-10 / CL
Fort Rucker Handout
SLIDE - 1
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
OUTLINE
1. Identify the characteristics of the UH-60 Blackhawk
Helicopter
2. Identify the UH-60 Fuselage Section Special Features
3. Identify the UH-60 Cockpit Special Features
4. Identify the operational characteristics of the UH-60 Power
Train System
5. Identify the operational characteristics of the UH-60
Landing Gear System
SLIDE - 2
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
TERMINAL LEARNING OBJECTIVE:
Identify major components / characteristics of the
UH-60 Blackhawk Helicopter
SLIDE - 3
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 1: Identify the characteristics of the
UH-60 Blackhawk Helicopter
• Army rotary-wing aircraft model designation: UH-60A+/L
• Designer and model designation: Sikorsky, S-70
• Number and kind of engines: two; General Electric
Company Model T700-GE-701D Turbo shaft
• Fully articulated, four-bladed, main rotor head; rigid
crossbeam, canted tail rotor-- two blades, four paddles
• Non-retractable landing gear consists of two main gear
assemblies and a tail wheel assembly
SLIDE - 4
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 1: Identify the characteristics of the
UH-60 Blackhawk Helicopter
Crew required
• Minimum--pilot - copilot
• Normal—
Pilot--right side of cockpit
Copilot--left side of cockpit
Crew chief/gunner--right side forward of cabin
SLIDE - 5
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 1: Identify the characteristics of the
UH-60 Blackhawk Helicopter
Mission
• Troop assault
• Aero-medical evacuation
• Aerial recovery
• Internal and external cargo
SLIDE - 6
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 1: Identify the characteristics of the
UH-60 Blackhawk Helicopter
Aircraft weights
• Empty--approximately 11,000 pounds
• Design weight--16,825 pounds
• Maximum gross weight--22,000 pounds (modified)
Fuel load--approximately 360 gallons, two main tanks full
(180 gallons each tank)
SLIDE - 7
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
SLIDE - 8
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
• Primary Structure - The primary structure is aluminum alloy.
Some titanium and steel are used for firewalls and various
fittings. Nonstructural members are primarily made of
reinforced plastic
• The fuselage may be broken down into the following
sections: Nose section, Mid fuselage, Aft fuselage or
transition section, Tail cone, Tail Rotor Pylon, Main Rotor
Pylon
SLIDE - 9
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
SLIDE - 10
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Nose or cockpit section
• Cockpit canopy, a kevlar reinforced plastic and
aluminum structure
• Pilot’s and copilot’s windshields.
• Shatter resistant and scratchproof glass
• Electrically heated for defogging and anti-icing
• Center windshield- laminated glass, electrically anti-iced
SLIDE - 11
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Nose or cockpit section
• Pilot’s and copilot’s cockpit doors
- Aluminum, hinged, and capable of being jettisoned
in an emergency
- Contains either a fixed slide-open, or push open
vent. The doors that have the push open vent
window are designed so the pilot can pull the entire
window into the cockpit for egress
• Avionics Compartment
Avionics compartment door hinges up from bottom
Held open in two positions by support strut
SLIDE - 12
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Cabin / Mid Fuselage
• Includes crew chief/gunner stations and the troop-cargo
compartment
• Two outward facing seats are for the crew
chief/gunners. Crew chief/gunner stations may have
machine guns installed
• Provisions for a maximum of 12 troop seats.
• Provisions for MEDEVAC pedestal with a capacity of four
to six litter patients
SLIDE - 13
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
SLIDE - 14
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
SLIDE - 15
Cabin / Mid Fuselage
• Forward sliding crewchief/gunners window incorporates
a nonflammable, stretchplex window split vertically into
two panels
• Defogged by heater outlet air directed from outer duct
assembly onto window.
• Sliding cargo doors on each side that cannot be
jettisoned
• Cargo door windows are jettisonable for use as for
emergency exits. Moving the EMERGENCY EXIT handle
aft, releases both windows. It may be necessary to push
windows free
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Cabin / Mid Fuselage
• Emergency Equipment consists of:
- Three first aid kits
- Two hand held (portable) fire extinguishers
-Crash axe in cabin
• The pilot and copilot flight controls are routed up each
side of cabin
• The main landing gear struts are mounted on each side
of the helicopter, just aft of the crewchief/gunners
windows
SLIDE - 16
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Cabin / Mid Fuselage
• Electrical junction boxes and relay panels located in
cabin ceiling
• Either a 9.5 Amp Hour Sealed Lead Acid Battery (SLAB)
or a 5.5 Amp Hour Nickel Cadmium (NICAD) battery is
located in forward cabin, left-hand side, aft of copilots
seat
• Cargo floor upper skin, cross-ply, unidirectional
fiberglass; core is Nomex; bottom skin is woven
fiberglass. Deck load limit is 300 pounds per square foot.
• Cargo hook--8,000 pounds capacity
•Two pitot tubes
SLIDE - 17
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Aft Fuselage / Aft Transition Section
• Two main fuel tanks #1 on left and #2 on right
• Two equipment compartments located above fuel
tanks, 20 by 20 by 40 inches, separated by fuel tanks
enclosure, maximum capacity is 125 pounds each side.
Cargo net restraints are available to restrain equipment
SLIDE - 18
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Aft Fuselage / Aft Transition Section
• Auxiliary Power Unit (APU) Hydraulic Accumulator or
Accumulators
• Used to start the APU using hydraulic pressure
• Normally automatically re-pressurized by the
backup hydraulic pump
• The hand pump is used to manually re-pressurize
the APU accumulator if it is below minimum required
pressure for APU start or if the APU fails to start
SLIDE - 19
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
SLIDE - 20
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Aft Fuselage / Aft Transition Section
• Steps on outside provide access to engines and APU
above on left and right sides of aircraft
SLIDE - 21
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Tail Cone
• The tail cone, interconnecting the transition section and
tail rotor pylon (station 644.62), supports the tail rotor
drive shaft and tail pylon
• Access panels allow inspection of tail landing gear
attachments, pylon attachment bolts, tail rotor flight
control cables and hydraulic lines, and tail landing gear
• Tail rotor drive shafts mounted on top under hinged
drives shaft covers
SLIDE - 22
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Tail Rotor Pylon
• The tail pylon is supported by and hinged to the tail
cone section which allows folding of the pylon to the
right for air transport
- The hinges are not critical structural members,
because the tail pylon is secured to the tail cone in
the flight position through the use of four bolts
- Eight close-tolerance bushings on the tail pylon
hinge align with eight tapered pins in the tail cone
hinge to ensure proper alignment
SLIDE - 23
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Tail Rotor Pylon
• Provides mounting points for the intermediate gearbox,
the connecting drive shaft, the tail gearbox, the tail rotor
assembly, the stabilator, and the dual electrical stabilator
actuators
• The drive shaft cover has a VHF/FM antenna built in to
provide communications, this cover, opens to provide
access to the tail drive shaft
• Removable fairings on the pylon are provided for access
to the intermediate and tail gear boxes, and tail rotor
flight controls
SLIDE - 24
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Tail Rotor Pylon
• The trailing edge of the pylon has an aerodynamically
shaped fairing, with a 7 degree camber to help unload
tail rotor in forward flight
• Retractable telescoping steps / hand-holds allow easy
access to the tail rotor area. Accessed by pushing and
rotating the cap 90 degrees counterclockwise, releasing
the spring loaded tread, allowing the tread to extend
SLIDE - 25
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Tail Rotor Pylon
• The helicopter has a variable angle of incidence
stabilator to enhance handling qualities
• Level trim
• Optimum attitude for flight
SLIDE - 26
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Main Rotor Pylon
SLIDE - 27
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Main Rotor Pylon
• Covers area forward and around main gearbox. Front
area of main rotor pylon slides forward on two tracks;
gives access to servos, mixing unit, heater, hydraulic
pumps, and various other hydraulic components. Allow
smooth airflow induction for cooling aircraft major
subsystem components
• Steps and walkways aid in inspection and maintenance
of the helicopter. Opening the engine doors and sliding
the forward fairing forward reveals additional designated
walkways/steps. Designated STEP AREAS have a non skid
coating applied
SLIDE - 28
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Main Rotor Pylon
• Various types of latches are used to secure fairings,
cowlings, and doors
• Aft Main Rotor Pylon fairings hinge open to give access
to APU, transmission oil cooler, two engine fire
extinguisher containers/bottles, and the fuel selector
valves
• Oil Cooler. The oil cooler access panels open to allow
inspection of various fuel lines, piping, valves and oil
cooler and blower
SLIDE - 29
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Main Rotor Pylon
• Auxiliary Power Unit (APU) is aft and left of main
gearbox
• Provides pneumatic power for main engine starting
and cabin heating
• Electrical power for ground operations and in-flight
emergency electrical power
SLIDE - 30
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Main Rotor Pylon
• Onboard Fire Extinguishing System
• Controlled by either the pilot or copilot
• Both bottles/containers may be used in either main
engine or APU compartment
• Thermal discharge indicator on the right side of aft
fuselage will rupture, indicating that one or both
containers experienced a thermal discharge
SLIDE - 31
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Main Rotor Pylon
• Onboard Fire Extinguishing System
SLIDE - 32
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Main Rotor Pylon
• Sliding Access Cover slides forward on two tracks; gives
access to servos, mixing unit, heating system, hydraulic
pumps, flight controls, main AC generators, and various
other hydraulic components
• Heater Mixing Unit is located on the forward right side,
under the sliding main rotor pylon. The heater mixing
unit is used to heat the cockpit and cabin and is operated
by bleed air from the main engines, APU, or external
source
SLIDE - 33
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 2: Identify the UH-60 Fuselage
Section Special Features
Main Rotor Pylon
• Engine Cowling/Work Platform
• The engine compartment doors hinge open, and
provide a flat surface for maintenance use and
inspection
• Capable of supporting a static weight of 250 pounds
SLIDE - 34
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• A full set of flight controls for both pilot and co pilot
• Energy Absorbing (EA) Pilot Seats are ballistic tolerant
against 7.62 mm rounds
WARNING: Do not store any items below seats. Seats stroke downward
during a crash and any obstruction will increase the probability and severity
of injury. To prevent injury to personnel, do not release either the normal or
emergency vertical adjust levers unless someone is sitting in the seat. The
extension springs are under load at all times. With seat at lowest position, the
vertical preload on the seat could be as high as 150 pounds. If no one is in the
seat and vertical adjust lever (s) is released, the seat will be snapped to the
highest stop. Anyone leaning over the seat or with hands on guide tubes
above linear bearings, will be seriously injured.
SLIDE - 35
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• Energy Absorbing (EA) Pilot Seats
NOTE: The seat’s energy attenuators allow the seat to move vertically about
12 inches at between 14 and 19 G’s.
• Emergency Vertical Release Levers allows crewmember
to lower the seat to its lowest position
• Emergency Tilt Release Levers allows crewmember to
tilt seat aft to remove a disabled pilot
• Horizontal and vertical adjustment levers allow seat
adjustment of approximately 5 inches
• Armored wing slides forward on outboard side
SLIDE - 36
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• The NO. 1 AC Primary and DC circuit breaker panels are
located over the copilot's head; the NO. 2 AC Primary, AC
Essential and NO. 2 DC Primary circuit breaker panels are
located over the pilot's head
• The Battery Bus circuit breaker panel is located on the
lower center console on the aft left hand side
• The DC Essential Bus circuit breaker panels are located on
the rear of the upper overhead center console
SLIDE - 37
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• Instrument Panel. Engine and dual flight instruments are
located on the one-piece instrument panel tilted forward
30°. Pilot and copilot instruments on outboard panels with
identical layout. Non flight instrument display on center
panel
• Caution Advisory Panel just to the left of center with 82
indicator capsules. Cautions lights are amber, advisory
lights are green
• Master Warning Panels one in front of each pilot on the
glare shield contain the following capsules labeled:
MASTER CAUTION PRESS TO RESET (amber), #1 ENG OUT,
#2 ENG OUT, FIRE, and LOW ROTOR RPM
SLIDE - 38
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• Vertical Instrument Display System (VIDS) consists of a
vertical strip Central Display Unit (CDU), two vertical strip
Pilot Display Units (PDU), and two Signal Data Converters
(SDC)
• (PDU’s) for both pilots displays the engine power turbine
speed (% RPM 1 and 2), rotor speed (% RPM R), and torque
(% TRQ 1 and 2). When the TEST switch is pressed, all PDU
scale lamps should light and digital readouts should display
188. Three overspeed lights at the top will appear from left
to right when a corresponding rotor speed of 127%, 137%,
and 142% is reached
SLIDE - 39
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• The (CDU) contains instruments that display fuel quantity,
transmission oil temperature and pressure, engine oil
temperatures and pressures, turbine gas temperature (TGT),
and gas generator speed (Ng) readings. When the Lamp Test
Switch is pressed all CDU scale lamps should illuminate and
the digital readouts should display 888
SLIDE - 40
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• The (CDU):
• Digital readouts are also installed on the TOTAL FUEL,
TGT, and Ng indicators
• The No. 1 and No. 2 fuel quantity is displayed on the
analog scales and the total fuel is displayed on a digital
readout
• The CDU and PDUs contain photocells that
automatically adjust the lighting of the indicators with
respect to ambient light
SLIDE - 41
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• The (CDU):
• A failure of any SDC or CDU processing circuit, display
driver module, or logic power supply, will cause the
associated display channel to turn off or switch to the
backup processor, and will light the associated CHANNEL
failure light
• Failure of the lamp power supply within a SDC, will
cause every second display light on the CDU to go off. If a
digital processor fails, all digital displays will go off
SLIDE - 42
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
SLIDE - 43
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• The Upper Console, overhead between pilot and copilot,
contains engine controls, fire emergency controls, heater and
windshield wiper controls, internal and external light
controls, electrical systems, and miscellaneous helicopter
system controls
• The Lower Console, next to the base of the instrument
panel and extending through the cockpit between the pilot
and copilot, is easily reached by either pilot. The console is
arranged with communication panels, navigational panels,
and flight attitude/stability controls
SLIDE - 44
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• Miscellaneous Switch Panel consists of three push-button
switches marked FUEL IND TEST, TAIL WHEEL, and GYRO
ERECT, and one toggle switch marked TAIL
SERVO/NORMAL/BACKUP
SLIDE - 45
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• The FUEL IND TEST SWITCH, when pressed in and held,
causes digital readout and strip indicators to change and
caution lights to flash, to test the fuel quantity indicating
system
• The TAIL WHEEL switch unlocks and locks the TAIL WHEEL in
a trail position, and indicates LOCK or UNLK
• The GYRO ERECT initiates a higher voltage to the attitude
indicating system's vertical gyros
• TAIL SERVO NORMAL/BACKUP Switch allows selection of #1
or #2 tail rotor servo
SLIDE - 46
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 3: Identify the UH-60 Cockpit
Special Features
• Stabilator/Automatic Flight Control Panel
• The panel contains a MAN SLEW switch, a TEST button,
and AUTO CONTROL RESET switch with a push-to-reset
feature.
• The automatic flight control portion of the panel
controls the Automatic Flight Control System(AFCS) which
enhances the stability and handling qualities of the
helicopter.
SLIDE - 47
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 4: Identify the operational
characteristics of the UH-60 Power Train System
• The UH-60 employs two General Electric T700-GE-700
Turbo Shaft engines with an input drive shaft that is
approximately 18 inches long and connects the engines
power turbine output to the input module on main gearbox
•The engine is divided into four modules: cold section, hot
section, power turbine section, and accessory section
SLIDE - 48
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 4: Identify the operational
characteristics of the UH-60 Power Train System
• The main transmission is mounted on top of the cabin
between the two engines
• The main transmission assembly consists of five
modules
- The Main Module
- Two Input Modules
- Two Accessory Modules (drives the following
accessories):
• The No. 1 & 2 Hydraulic Pump Modules
• The No. 1 & 2 AC Generators
SLIDE - 49
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 4: Identify the operational
characteristics of the UH-60 Power Train System
• Intermediate gearbox is bolted to top of pylon, changes
angle of drive, and reduces RPM
• The tail gear box mounts the tail rotor and enables pitch
changes of tail rotor blades, changes angle of drive and gives
a gear reduction
SLIDE - 50
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 4: Identify the operational
characteristics of the UH-60 Power Train System
SLIDE - 51
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 4: Identify the operational
characteristics of the UH-60 Power Train System
• Two independent hydraulic systems and a backup hydraulic
system. Backup hydraulic pump is mounted to and driven by
an AC electric motor
• The automatic flight control system (AFCS) enhances the
stability and handling qualities of the helicopter
• The UH60 employs a fully articulated main rotor head
• The main rotor hub is machined from titanium forging
• Four, non-lubricated, elastomeric, spindle module
assemblies allow hunting, flapping, and pitch change of
the four main blades
SLIDE - 52
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 4: Identify the operational
characteristics of the UH-60 Power Train System
• Tail rotor (XBR) Crossbeam Rotor
• The two blade spars bolted together at their centers
make an assembly of four ridged paddles
• The counterclockwise rotating tail rotor, canted 20º
upward provides approximately 2.5% lift of gross weight,
and allows for:
- Shorter nose
- Aft CG capability
- Low profile
- Greater hover and low speed flight stability
SLIDE - 53
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• The helicopter has conventional, non-retractable landing
gear system, consisting of two main gear assemblies and a
tail wheel assembly
• The interchangeable drag beams, attaches to the airframe
at one end and to the shock strut at the other, and transmits
landing loads to the airframe and shock strut
• A static ground wire is clamped to the left axle retaining
bolt only to assist in dissipating static electricity while on the
ground. A static bonding jumper is connected to the airframe
and to the drag beam on both main landing gears to ensure
there is a good path for any static electricity buildup to the
static ground wire connected to the left axle retaining bolt
SLIDE - 54
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• A landing gear weight-on-wheels (WOW) switch is installed
on the left landing gear to control operation of selected
systems
• Main shock strut is a two-stage, nitrogen-oil shock strut. It
strokes approximately 24 inches and is covered with a
fiberglass panel
• Two-stage struts are in tandem. Lower stage compresses
first to absorb shock loads up to 10 feet per second (fps);
upper strut starts to compress above 10 fps
SLIDE - 55
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
SLIDE - 56
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Each stage has three variable-size oil chambers and a
floating piston with a nitrogen charge in the struts which
gives a spring action as the aircraft lands and taxies; hydraulic
fluid (MIL-H-5606) in each stage will regulate the rate of
compression and extension
• At design weight (16,825 pounds), struts should prevent the
fuselage from contacting the ground when landing at
approximately 11.25 g’s
SLIDE - 57
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• The system incorporates a jack and kneel feature that
permits manual raising or lowering of the fuselage for air
transportability
• Maximum forward touchdown speed is limited to 60 knots
ground speed on level terrain
• Do not exceed a touchdown sink rate of 540 feet-per
minute on level terrain and 360 feet-per minute on slopes
with gross weights of up to 16,825 pounds; above 16,825
pounds gross weight 300 feet-per-minute on level terrain
and 180 feet-per-minute on slopes
SLIDE - 58
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Main Wheel Assembly
• Each wheel consists of a 26 x 10.0-11 tubeless tire, that
is serviced with nitrogen, a forged aluminum two section
wheel rim (inner diameter -11 inches; outer, 13 inches)
• On the inner wheel half, seven (7) drive keys engage the
two rotating steel, key-slotted disks (part of the brake
system) to the wheel
• Both main wheels have a self-adjusting, double disc,
three-cavity brake assembly, which includes a visual
brake lining wear indicator
SLIDE - 59
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Brake Assemblies
• Has four master cylinders--one on each anti-torque
control pedal
• Two slave mixer valves under the pilot’s seat
• Parking brake valve under the pilot’s seat
• Parking brake T-handle is on the aft center console
NOTE: To set the parking brakes, press on either the pilot or
the copilot toe brake pedals, pulling the parking brake handle
to its fully extended position, then releasing the toe brakes
while holding the handle out
SLIDE - 60
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Brake Assemblies
• Pressing either pilot or copilot left brake will release the
parking brakes. When releasing the parking brakes with
the rotor systems turning, ensure that pressure is applied
to both pedals to prevent inadvertently pushing the
pedals and changing pitch in the tail rotor blades
SLIDE - 61
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Brake housing with wear indicators bolted to each drag
beam
• Two visual brake lining wear indicators are located on
both brake housings
• The wear indicators are spring loaded in the retracted
position to ensure they do not drag on the disk during
normal operation
• Pushing on the spring loaded wear indicator pin until it
touches the brake disk then observing the amount of the
pin height remaining above the nut indicates the level of
wear of the brake pads (pucks). If the wear pin becomes
flush with nut, replacement of the brake pads is required
SLIDE - 62
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Tail Wheel Assembly
• The tail wheel swivels 360° locks in the trail position and
encompasses a two-stage tandem nitrogen-oil shock strut
• Lower stage compresses to absorb normal taxi and
landing loads up to 10 feet per second. The upper strut
compresses above 10 feet per second
• The fixed tail landing gear secures to the rear tail cone
structure and provides rear support of the helicopter. The
upper end of the strut is bolted to the tail cone with the
lower end of the nitrogen-oil shock strut bolted to the
yoke
SLIDE - 63
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Tail Wheel Assembly
• LANDING SPEED LIMITATIONS - Maximum forward
touchdown speed is limited to 60 knots ground speed on
level terrain
SLIDE - 64
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Tail Wheel Lock System
• An electrically operated actuator, secured to the yoke
assembly, secures the tail wheel in the trailing position
when the helicopter is parked or in flight
• The lock pin actuator is controlled by the tail wheel lock
control switch in the miscellaneous switch (MISC SW)
panel. When the tail wheel control switch is pushed in,
power from the DC essential bus energizes the actuator
to the extended position which will move the spring
cylinder and the lockpin bellcrank aft, inserting the
lockpin down into the hole of the fork which prevents the
fork from swiveling
SLIDE - 65
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
LEARNING STEP 5: Identify the operational
characteristics of the UH-60 Landing Gear System
• Tail Wheel Lock System
SLIDE - 66
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
SUMMARY
1. Identify the characteristics of the UH-60 Blackhawk
Helicopter
2. Identify the UH-60 Fuselage Section Special Features
3. Identify the UH-60 Cockpit Special Features
4. Identify the operational characteristics of the UH-60 Power
Train System
5. Identify the operational characteristics of the UH-60
Landing Gear System
SLIDE - 67
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12
UNCLASSIFIED
SLIDE - 68
Introduction to UH-60
AASF1-NY Standards - 27 Feb 12