11 - System: Structure Flashcards

1
Q

Structure: Name the different sub-assemblies of the structure

A
  1. Canopy
  2. Body Structure
  3. Rear Structure
  4. Tail Boom
  5. Tail Unit
  6. Landing Gear
  7. Bottom Structure and Cabin Floor

(Instruction Manual - Basic 1 - Main Systems, Chapter 2, Paragraph 2.1.1)

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2
Q

Structure: What is the structural design of the body structure?

A

Designed as a Rigig Hexahedron

It supports:

  • Main transmission components
    • MGB
    • Rotor
  • Landing gear
  • Cabin floor
  • Rear structure
  • Encloses the fuel tank

(Instruction Manual - Basic 1 - Main Systems, Chapter 2, Paragraph 2.2)

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3
Q

Structure: How is the bottom structure and cabin floor attached to the body structure?

A

By two beams

(Instruction Manual - Basic 1 - Main Systems, Chapter 2, Paragraph 2.3)

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4
Q

Structure: In which direction does the horizontal stabilizer produces lift?

A

Downward - in order to create a more comfortable attitude during flight

(Instruction Manual - Basic 1 - Main Systems, Chapter 2, Paragraph 2.2)

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5
Q

Structure: What is the purpuse of the step on the left hand side of the horizontal stabilizer?

A

To create more downward lift on the left hand side of the horizontal stabilizer, by providing a more cambered profile - thus counteracting the right skid low attitude.

(Instruction Manual - Basic 1 - Main Systems, Chapter 2, Paragraph 2.7.1)

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6
Q

Structure: What is the purpose for the different aerodynamic design of the upper and lower vertical fin?

A

Upper vertical fin (cambered profile)

  • Generates an aeordynamic force to oppose main rotor torque (support tail rotor)
  • Counteract right skid low attitude

Lower vertical fin (symmetrical profile)

  • Stabilizing the aircraft in its yaw axis

(Instruction Manual - Basic 1 - Main Systems, Chapter 2, Paragraph 2.7)

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7
Q

Structure: How is the landing gear cross tube attached to the aircraft?

A
  • Clamps (4)
  • Hydraulic shock absobers (2) on the forward cross tube
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8
Q

Structure: What is the purpose of the steel stribs bent downwards extending at the rear part of the skid?

A

Prevent ground resonance

(Instruction Manual - Basic 1 - Main Systems, Chapter 2, Paragraph 2.10.3)

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9
Q

Structure: How many anti-vibration devices is installed in the aircraft?

A

3

  • Pilot seat
  • Co-pilot seat
  • Main rotor head
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