Aircraft Structures and Control
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Subject: Aviation And Aerospace Engineering
Class: SHS 2
Term: 1st Term
Week: 17
Grade code: 3.1.3.LI.2
Strand code: 1
Sub-strand code: 3
Content standard code: 3.1.3.CS.2
Indicator code: 3.1.3.LI.2
Theme: Core Concepts in Aerospace Engineering
Subtheme: Aircraft Structures and Control
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Welcome, future engineers and aviators! Today, we are moving from the fixed-wing aircraft we often see at Kotoka International Airport to a different, fascinating type of flying machine: the rotary-wing aircraft, most commonly the helicopter. Why is this important for us in Ghana? Helicopters are vital tools used by the Ghana Armed Forces for security and peacekeeping missions, by the National Ambulance Service for medical emergencies, and by companies in our oil and gas sector in Takoradi to ferry workers to offshore rigs. Understanding how a pilot controls these complex machines is a fundamental step in appreciating the genius of aerospace engineering.
A. What is a Rotary-Wing Aircraft?
A rotary-wing aircraft is an aircraft that generates lift using a set of rotating blades, called rotor blades. Unlike a fixed-wing aircraft (like an Airbus A320) which needs to move forward to generate lift, a helicopter can generate lift while staying in one spot. This gives it the unique ability to take off and land vertically and to hover.
The main set of rotating blades on top is called the main rotor. The smaller set of blades on the tail is called the tail rotor. Today, we will learn how the pilot controls both. B. The Four Main Flight Controls
A helicopter pilot uses four main controls to fly the aircraft. These are: The Collective Pitch Control (The Collective) The Cyclic Pitch Control (The Cyclic) The Anti-Torque Pedals The Throttle