11 - System: Structure

Question 1

Structure: Name the different sub-assemblies of the structure

Answer 1

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)

Question 2

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

Answer 2

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)

Question 3

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

Answer 3

By two beams

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

Question 4

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

Answer 4

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

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

Question 5

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

Answer 5

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)

Question 6

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

Answer 6

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)

Question 7

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

Answer 7

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

Question 8

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

Answer 8

Prevent ground resonance

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

Question 9

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

Answer 9

3

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