Introduction:Ahh, Aviation Science. When I came to Hwa Chong and found out that I could take Singapore Youth Flying Club as a CCA, I was simply elated. I guess I have to say I was born into such an environment; my dad is a lecturer at Temasek Polytechnic, teaching the course on avionics. Then again, avionics isn't aviation, avionics is a portmanteau of "aviation" and "electronics". It comprises electronic systems for use on aircraft, artificial satellites and spacecraft, comprising communications, navigation and the display and management of multiple systems.
Then again, his constant fascination with helicopters, planes and jets naturally led me in his path. He would bring back radio-controlled helicopters or planes from those stores and let me take a try at controlling them. That was when my passion for aviation started.
Into the Sabbatical itself:Now you might ask me, why did I only take this sabbatical this year when I am secondary 2, and not last year? Well my answer was simple, I wanted to concentrate more on the 'flying' activities in my 2nd CCA, Youth Flying Club, before going into the theory itself. Last year the course was conducted in 2 Sabbatical weeks, a
basic course, which was a pre-requisite for the
advanced course.
This year, however, they decided to mash both together, which can be a good and bad thing, one of the pros being that the students save a
lot more money, as each course cost $100.
So moving on to the details of the course itself, the content was spilt up among the week; the basic section will be conducted on Monday, Tuesday and Wednesday, while the advanced section will be conducted on Thursday and tomorrow(Friday). Throughout the entire Sabbatical though, I found the time not enough - the instructor had to skip a
lot of content in order to make sure we had enough time to experience the 'hands-on' part ourselves. He also said that last year, he would go through the acadamic part first, which is the things we learn in science class(Energy, Rate, Speed, Density etc.) and then showing us how it linked and how we could apply to flying and aviation science. This term he just went straight into the application part, which meant it was very taxing on our brains throughout the whole sabbatical. I have to say something though, the instructor was
superb, he could make those dreaded and boring science theories interesting, and his lessons were conducted with personal experiences, stories, interesting slides and all sorts. This is simply an excellent sabbatical, and I strongly recommend this to anyone who has a passion for aviation.
What have I learnt?I will now split this into the basic module and the advanced module:
Basic Module - Basic Pilot CourseMajor Aircraft Parts:So on the first day, we were introduced to the parts and components that made up a plane. Of course it would vary from different models of the plane, but the components we learnt were the standard parts that every plane should have.
Fuselage - The fuselage or body of the airplane, is the component of he plane that holds all the other pieces of the plane together. The pilots sit in the cockpit at the front of the fuselage. Passengers and cargo are carried in the rear of the fuselage. Some aircraft carry fuel in the fuselage; others carry the fuel in the wings.
Wings - Well, need anything else be said? The wings are the part of the plane that actually allows to it fly! Due to the shape and the way the wings are designed and built, they generate most of the lift to hold the plane in the air.
Empennage - The empennage is a term used in aviation for the tail section of the plane. The empennage's purpose is mainly to control and maneuver the aircraft, as smaller wings are located at the tail of the plane. The tail usually has a fixed horizontal piece, called the horizontal stabilizer, and a fixed vertical piece, called the vertical stabilizer. The stabilizers' job is to provide stability for the aircraft, to keep it flying straight. The vertical stabilizer keeps the nose of the plane from swinging from side to side, which is called yaw. The horizontal stabilizer prevents an up-and-down motion of the nose, which is called pitch. (On the Wright brother's first aircraft, the horizontal stabilizer was placed in front of the wings. Such a configuration is called a canard after the French word for "duck").
Landing Gear - Consist of three wheels in most cases of a plane for landing.
Powerplant - This is basically the part of the plant that helps it generate thrust, which in most cases of planes are turbojets, propeller engines, or turbofans.
Flight Control and Basic Maneuvers:
Instead of having a 5-day long course of just teaching and lecturing, we also used flying simulation software, such as the Microsoft Flight Simulator software, to train on flying and learn on aviation. So in this part of the sabbatical, we basically learnt what was the longitudinal axis, the lateral axis, vertical axis, and the techniques of flying. I have to say that the simulator is really realistic, such as that real professional pilots train on it too!
Basic Flight Aerodynamics:
For most people attending this sabbatical, this has got to be the most 'brain-juice' intensive part of the programme, though I found it quite a breeze as I already had some background knowledge of aerodynamics.
So, why do planes even fly? ow comes to the question, how does our glider fly? First we have to know the four forces that are present before flight can take place. Thrust, lift, drag and weight. Thrust being a propeller or engine that generates the energy for the plane to move forward. Lift is produced because the airflow above the wing is faster than the airflow below the wing, and because of Bernoulli's Principle(Don't really want to elaborate on theories), the pressure and velocity changes, and thus creating lift according to Newton's third law of motion. Drag is incurred mainly because of air resistance. Weight basically consists of the components of the plane.
We were also taught on Center of Gravity, Weight and Balance and why the plane is designed in a certain way and how it helps to improve the overall flying performance
Basic Navigation / Navigation Aids:
Alttitude Indicator, Altimeter, Turn Coordinator, Heading Indicator, Airspeed Indicator, Vertical Speed Indicator and a simple clock. These are only some of the instruments that a pilot uses to navigate around. Without these instruments, pilots would most probably find it hard to fly, as a risk of stalling or crashing into a mountain could be the cause of such instruments failing. We also learn what were the the different ways a pilot could try to hover above terrain, such as VOF and IFR. We also learnt about certain terms such as Dead Reckoning, which is in contrast to flight by pilotage. This refers to flying a course solely by relying on calculations of time, speed, distance and direction. Scary what technology huh?
Instrument Charts
I would say this was basicallya geography lesson on how to read and see the different information and charts or maps that pilots use to fly. Boring? No, the superb instructor I talked about managed to put in stories of how errors in a simple map could cause disaster to the pilot, co-pilot and passenges.
Advanced Module - Fighter Course
When I received the booklet for the advanced module today, I gave an incredulous look at the teacher - literally. It was thicker, with much more information as compared to the Basic Module, and we only had 2 days(including today) left to cover the content. We ended skipping a lot, and it was a pity as the title itself pique my interest. We did have a lot of 'hands-on' time though, to try different flight combat simulators such as Falcon 4.0: Allied Force. Don't be mistaken, we did not have a gaming course during this time, these simulators were very realistic, and if you play it like you would play a game, you would die before you even got into battle during take-off.
There was one thing that really got my interest in this area, which is a term called "G-Force". "The g-force (with g from gravitational) associated with an object is its acceleration relative to free-fall. This acceleration experienced by an object is due to the vector sum of non-gravitational forces acting on an object free to move. The accelerations that are not produced by gravity are termed proper accelerations, and it is only these that are measured in g-force units. They cause stresses and strains on objects, which are felt as weight (any g-force can thus be simply described, and measured, as a "weight per unit mass"). Because of these strains (weight forces), large proper accelerations (large g-forces), may be destructive." - quote from wikipedia(I couldn't find a better explanation for it, and using my own words would just be twisting its meaning.
Check this video here to find out how a pilot experiences 9G: https://www.youtube.com/watch?v=V9d_PK6pWNo&feature=related
With that, I would really like to say that I thoroughly enjoyed this course. I cannot wait for tomorrow, which is the last day of the course, where we all get to pit our skills against each other in the combat flight simulator. I might yet be a budding pilot, with a flying dream: "For once you have tasted flight, You will walk the Earth with your eyes turned skyward; For there you have been, And there you long to return." - Leonardo Da Vinci, On Flight of Birds.