Airframe Flashcards
How many sections in the airframe?
Describe their divisions
3
Forward: Cabin nose to Bulkhead aft if passenger compartment
Intermediate: Bulkhead aft of passenger compartment to Tailboom
Tailboom: start of Tailboom and aft
Main materials in the Forward section.
Aluminum honeycomb and carbon graphite structures
Purpose, location and size of the tapered fairings in the Forward section.
Reduce aerodynamic drag
Forward door hinge to the bulkhead
3.5 inches per side
Materials that make up the nose
Fiberglass composite
Materials that make up the internal structure
Aluminum
Materials that make up the doors and door frames
Carbon-fiber composites
Describe door emergency egress function
Doors are jettisonable via a secondary release handle that disconnects the attachment pins from the door hinges
Litter Door CAS
Litter door not securely latched
Land as soon as practical
What are the seats made of?
Flame resistant leather fabric
Describe the materials that go into the windows
Windscreen: Polycarbonate shatter resistent windscreens
Chin bubbles: tinted acrylic plastic
Roof: Dark tinted acrylic plastic
Crew/Pax: Light gray tinted acrylic plastic
Main materials in the Intermediate section
Semi-monocoque structure with four longerons and carbon fiber composite side skins
Engine pan serves what 2 purposes?
As both a drip pan and a firewall made of titanium
What is in the equipment compartment?
Below the engine, behind the parcel shelf, above the baggage compartment.
Whats in the equipment compartment?
avionics/electrical equipment, fuel signal conditioner, space for optional equipment
Baggage compartment max weight
250 lbs
Baggage compartment max volume
16 cubic feet
How many tied downs in the baggage compartment?
10
Baggage Door CAS
Baggage door is not securely latched
Land as soon as Practical
- shore power door on same CAS message
Main materials in Tailboom section
Full monocoque design, obtaining its strength through skin and internal bracing
How is the tailboom attached?
4 bolts
What supports the tail rotor drive shaft?
The hanger bearings which are mounted via brackets. Six in total.
Describe the horizontal stabilizer (mounting, material, purpose)
The horizontal stabilizer is a one-piece aluminum honeycomb inverted airfoil mounted through the tailboom. The inverted airfoil provides downward lift to maintain the cabin in a nearly level attitude through all cruise speeds.
What is on the leading edge of the horizontal stabilizer and whats its purpose?
A leading edge slat
Improves pitch stability during climbs
What is on the trailing edge of the horizontal stabilizer and what is its purpose?
Gurney flap
Reduces mast stress at high speeds
What is mounted on the end of the horizontal stabilizer and what is the purpose?
End auxiliary fins offset 5 degrees from the centerline Improves dihedral (roll) stability in forward flight
Describe the vertical stabilizer (fin)
Purpose and construction
Provides directional (yaw) stability
Canted outboard 9 degrees to reduce required amount of tail rotor thrust during forward flight at cruise speeds
Composed primarily of aluminum honeycomb
Purpose and limits of the stinger
Installed to prevent tail rotor making contact with the ground
400 lbs of force
Describe the cowls, positions, and what they are made of
- Forward - hydraulics, carbon-fiber composite
- Transmission - fiberglass composite
- Air induction - aluminum
- Engine - carbon-fiber composite
- Aft - oil cooler, blower assembly, engine oil tank, carbon-fiber composite
- Tailcone - covers tail rotor driveshaft, fiberlass composite
MR tie down max load
60 lbs
MR tie down max deflection
50 inches
