Structure & AVCS Flashcards
Overall length
41.47 ft
Nose to tail length
35.03 ft
MR diameter
35.07 ft
Overall height
11.84 ft
Stinger height
1.93 ft
MR rigging
2 deg forward
TR diameter
3.28 ft
What are the main components of the fuselage?
- canopy
- main structure (bottom structure/cabin floor, body/rear structure)
- aft structure (tail boom, horizontal stab, Fenestron)
What are the 2 types of composite structure?
- Monolithic - laminated materials produced from thermosetting resins and reinforcing materials
- Sandwich structure - laminated panels made of honeycomb core between two skins of pre-impregnated layers of fabric
What is the only stainless steel piece on the airframe?
Engine deck, top of the rear structure
Name a few components made of light alloy
Doors
Body Structure
Rear Structure
Landing Gear
Tail Boom
Horizontal Stabs
Height shield on TR drive cover
Cowling around swashplates
Name a few components made of Composites, and what might those composite be?
Composites: glass/carbon honeycomb, sandwich structure
Lower fairings
Canopy
Upper cowlings (air intake, MGB and Engine cowlings)
Fenestron and vertical fin
What are the 2 pieces made specifically of glass/carbon fiber composite?
Landing gear fairings
Forward/Rear sections of TR drive shaft cover
What is the strongest part of the airframe?
Rigid box or Rigid hexahedron
What are the bonded windshield panels made of?
Plexiglass
What are the roof windows made of?
Makrolon
What are the lower windows made of?
Transparent Polycarbonate
Describe the door light system
The cargo doors have micro-switches which inform the pilot when one or both lateral doors are not correctly closed.
What is the procedure if the (DOOR) light illuminates?
- Vne 70kts
- Land as Soon as Practicable
- Descent and approach at low descent rate
Describe the energy absorbing system in the seats
- When the G loads exceed 6G, the steel plate securing the spring breaks.
- The spring becomes the only link between the bucket and the lower part of the seat.
- The spring absorbs the energy and protects the pilot.
- Therefore, never stow anything under the seats.
Wha does AVCS stand for?
Which airframe does it apply to?
T2 Active Vibration Control System
What is the purpose of the AVCS?
Designed to reduce intensity of vertical vibrations caused by harmonic airframe motion excited by the MR
- to increase pilots/passengers comfort
With AVCS - ON, what is happening?
The computer is running an algorithm to analyze the vibrations and send commands to the actuators located throughout the aircraft
- actuators mechanically create “anti-vibration” forces to stop the progression of vibrations caused by the MR
How does the AVCS work, step-by-step?
- Vibrations are detected by accelerometers
- Information sent to the computer
- Computer calculates reverse vibrations
- Information sent to the actuators
- Actuators mechanically create “anti-vibrations”
What are the components of the AVCS?
5 accelerometers (ACC)
4 active vibration control actuators (AVCA)
1 rotor speed sensor (RSS)
The active vibration control computer and power amplifier (AVCCPA)
