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Bell 407 > Airframe > Flashcards

Airframe Flashcards

1
Q

How many sections in the airframe?

Describe their divisions

A

3
Forward: Cabin nose to Bulkhead aft if passenger compartment
Intermediate: Bulkhead aft of passenger compartment to Tailboom
Tailboom: start of Tailboom and aft

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2
Q

Main materials in the Forward section.

A

Aluminum honeycomb and carbon graphite structures

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3
Q

Purpose, location and size of the tapered fairings in the Forward section.

A

Reduce aerodynamic drag
Forward door hinge to the bulkhead
3.5 inches per side

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4
Q

Materials that make up the nose

A

Fiberglass composite

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5
Q

Materials that make up the internal structure

A

Aluminum

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6
Q

Materials that make up the doors and door frames

A

Carbon-fiber composites

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7
Q

Describe door emergency egress function

A

Doors are jettisonable via a secondary release handle that disconnects the attachment pins from the door hinges

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8
Q

Litter Door CAS

A

Litter door not securely latched

Land as soon as practical

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9
Q

What are the seats made of?

A

Flame resistant leather fabric

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10
Q

Describe the materials that go into the windows

A

Windscreen: Polycarbonate shatter resistent windscreens
Chin bubbles: tinted acrylic plastic
Roof: Dark tinted acrylic plastic
Crew/Pax: Light gray tinted acrylic plastic

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11
Q

Main materials in the Intermediate section

A

Semi-monocoque structure with four longerons and carbon fiber composite side skins

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12
Q

Engine pan serves what 2 purposes?

A

As both a drip pan and a firewall made of titanium

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13
Q

What is in the equipment compartment?

A

Below the engine, behind the parcel shelf, above the baggage compartment.

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14
Q

Whats in the equipment compartment?

A

avionics/electrical equipment, fuel signal conditioner, space for optional equipment

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15
Q

Baggage compartment max weight

A

250 lbs

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16
Q

Baggage compartment max volume

A

16 cubic feet

17
Q

How many tied downs in the baggage compartment?

A

10

18
Q

Baggage Door CAS

A

Baggage door is not securely latched
Land as soon as Practical

  • shore power door on same CAS message
19
Q

Main materials in Tailboom section

A

Full monocoque design, obtaining its strength through skin and internal bracing

20
Q

How is the tailboom attached?

A

4 bolts

21
Q

What supports the tail rotor drive shaft?

A

The hanger bearings which are mounted via brackets. Six in total.

22
Q

Describe the horizontal stabilizer (mounting, material, purpose)

A

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.

23
Q

What is on the leading edge of the horizontal stabilizer and whats its purpose?

A

A leading edge slat

Improves pitch stability during climbs

24
Q

What is on the trailing edge of the horizontal stabilizer and what is its purpose?

A

Gurney flap

Reduces mast stress at high speeds

25
Q

What is mounted on the end of the horizontal stabilizer and what is the purpose?

A 
End auxiliary fins offset 5 degrees from the centerline
Improves dihedral (roll) stability in forward flight
26
Q

Describe the vertical stabilizer (fin)

Purpose and construction

A

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

27
Q

Purpose and limits of the stinger

A

Installed to prevent tail rotor making contact with the ground
400 lbs of force

28
Q

Describe the cowls, positions, and what they are made of

A
  1. Forward - hydraulics, carbon-fiber composite
  2. Transmission - fiberglass composite
  3. Air induction - aluminum
  4. Engine - carbon-fiber composite
  5. Aft - oil cooler, blower assembly, engine oil tank, carbon-fiber composite
  6. Tailcone - covers tail rotor driveshaft, fiberlass composite
29
Q

MR tie down max load

A

60 lbs

30
Q

MR tie down max deflection

A

50 inches

Bell 407 (19 decks)

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