Pratica di Shadowing: Aircraft General Knowledge | PPL Expert Online Ground School FREE Sample - Impara a parlare inglese con i video
Creazione lezione...
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Welcome to PPExpert, my name is Tom and I'll be presenting the Aircraft General Knowledge course.
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This course is designed to give you an in -depth understanding
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on the theory required to pass the CAA theory exam for this particular topic.
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Despite this, own self -study, commitment, and discipline will be required.
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The course is displayed in the form of a slideshow which I'll be talking through.
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Please feel free to pause the recording at any point to either take a break
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or write down any notes
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so now we're going to look at the contents of what we're going to cover in the subject
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so we're going to cover the airframe of the aircraft the aircraft engine itself
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and its components the carburetor aircraft systems so how they will work
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and instrumentation okay and all these will be covered in more detail
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which is applicable to the PPL syllabus for the exams
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so the major components of an aeroplane are the fuselage
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which is the main body where the passengers sit the wings
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which create the lift tail assembly which is the horizontal
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and the vertical stabilizer flight controls so how we maneuver the aircraft the landing gear
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which absorbs the weight of the aircraft and the engine
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and the propeller okay
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so we're gonna go through all of these in more detail
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first of all though we're going to look at the fuselage
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so the main body of the aircraft and it is the main structure to
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which all other components are attached okay
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so all the other all the other components are attached to
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the fuselage the fuselage is the main the main part of it now different aircraft have different construction techniques
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but most light aircraft are of a semi monocop construction
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and we'll go through what that means next
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so first of all what is a monocoque construction
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and a monocoque construction is when the skin of
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that structure is the entire weight bearing structure
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so the skin has all the strength in it to hold
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a shape the way it is okay there are formers inside used to keep the shape
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but they aren't structural bearing it's the skin itself that holds the weight of the aircraft
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and its strength effectively so an example of this maybe could be something like an egg
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if you were to hold an egg
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and squeeze it really hard it's probably unlikely to break
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but once that shell cracks then the structural integrity of the egg is broken
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and that's similar to a monocoque construction where the skin holds all the rigidity and strength within the structure.
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Then we have a semi -monocoque construction.
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The way this works is there's a lightweight framework inside which
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that supports the skin and it's the combination of the framework and the skin itself which will give the structure strength.
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So it's a combination between formers and skin
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that improves the strength of any structure if the skin is damaged that means
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that not necessarily the whole structure will be compromised in strength
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as it's got sort of almost two layers of protectivity
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and most aircraft use make use of this technique as it offers the most redundancy
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if anything were to get damaged so next we're going look at the wings
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so the wings itself are the component that create lift
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and they're exposed to very heavy loads
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and those loads are well in excess of the aircraft's weight
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itself the main structure of the wing is a central spa
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which is where all the strength within the wing lies okay
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and it can carries the loads vertically upwards and downwards
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and then from the spa there's also ribs
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which often stiffen the skin of the wing itself
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and they help transfer some of the load
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so it just increases the structural integrity of the aircraft
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so here's a diagram of a wing construction
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so you've got the skin itself which offers some strength you've got the main spar
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which is the most load -bearing part and then the ribs itself
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which offers some strength in a perpendicular direction okay
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and all of these together is what increases the strength within the aircraft
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So different aircraft have different wing designs and it's by and large to their purpose.
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So you can see that some aircraft have a lower wing, some aircraft have a higher wing or some aircraft have a biplane design, so dual wings.
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They all perform the same purpose
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and it will have very slight characteristic differences between the handling of these aircraft but by
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and large they all perform exactly the same in terms of
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creating lift it's just a different way of constructing an aircraft
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so next we can look at the tail
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or otherwise known as the empennage
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and it consists of two elements okay we've got horizontal stabilizer
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and a vertical stabilizer okay
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and most conventional is the horizontal stabilizer lower down with a vertical stabilizer going up
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and it's better because it's easily accessible for checking on the ground
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but it's more susceptible from turbulence from the wings there are also t tail designs where the horizontal stabilizer is higher up
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and that means it's clear of that turbulence so it's slightly smoother to control
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however it's inaccessible on the ground it's harder to check for damage on the pre -flights
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and also a high detail design is susceptible to a steep stall
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which is talked about in principles of flight
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so just um some housekeeping about securing an aircraft
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so we want to secure the aircraft facing into the wind
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if possible we should tie it down as well if we can
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so tight to the floor to make sure it's not gonna move around want to lock the control services
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and that's a lock within the aircraft
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which means the control services aren't free to move around covering
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the pitot tube with a cover as well as in all engine openings
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and we'll talk about some of these elements later on in AGK and
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if you need out just refer to the pilots handbook where
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it will give the best way to do all of these things
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so next we're going to look at cabin ventilation
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so how the cockpit of the aircraft gets ventilated with warm
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and cooler air so for cooler air there's normally a vent
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which just opens up to the outside where fresh air flow
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can flow into the cockpits providing the cooler air from the
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outside inside the cabin warmer however it's obviously much hotter to come by
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and it's taken from around the engine so there's a shroud around the exhaust
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and that air is heated by the exhaust which is then pumped into the cabin as hot air.
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We just need to be careful that because it's taken from around the exhaust
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if there was any pipes damaged in regards to the exhaust then
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that exhaust gas could leak into the air ventilation system
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and therefore cause carbon monoxide poisoning which can be deadly
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if exposed to and that's why we have carbon monoxide poisoners
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which we'll look at next so it's just being aware
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that all the hot air is coming from around the engine
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and the gases associated with that
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so as I said carbon monoxide poisoning could be present
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if there's a leak in the exhaust system and therefore the ventilation
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so we just need to be aware of it it's we talk more about it in human performance
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and limitations but some of the symptoms could be a headache, dizziness, nausea, a deterioration of vision,
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slow breathing, unconsciousness and eventually if we don't do anything about it death.
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Okay so we do need to be aware of it
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if we'd start experiencing some of these symptoms we want to open the cabin air vents
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and let that fresh air from the outside come in
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so we're not exposed to much of that hotter air which could possibly have carbon monoxide poisoning in it.
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We also have detectors in the aircraft in two forms one is a alarm just like a fire alarm
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and also we have this one as well
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which is a yellow orange circle and once carbon monoxide has been detected
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that orange circle will start to get some black dots on it
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so now we're going to look at an aircraft engine okay
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and more specific to the kind of engines that we will be using
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which are piston engines
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so we'll we'll actually be using the aircraft we fly there's lots of different types of piston engine aircrafts
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so different the way they're built and their purposes However, most engines in general aviation are horizontally opposed,
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and we'll look at that later on.
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Normally engines for aviation are specifically designed.
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They have higher tolerances, they're generally stronger,
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lighter to save weight, and they have more reliability let's see.
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So the first engine we're going to look at is a radial engine.
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And the cylinders in the radial engine are arranged around a central crankshaft.
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So they're all the way around a central point.
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They're quite large in diameter.
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And what this does is it allows for a high number of cylinders in a small space okay
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so they've got high power to size generally they're quite complex and they're quite prone to malfunction they're generally found on
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older aircraft they're not yet used too much nowadays
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but they do up a lot of power
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which is why they were used some years ago the next kind of engine is a straight four
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so instead of being horizontally opposed it's vertically opposed it's very
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simple design it's easy to access all the certain parts of the engine however it's not very space efficient
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so it's quite large in size it's a lot of wasted space underneath the cowling
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and they are ultimately a little bit heavier than the engines
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that we use nowadays and these will be generally found on smaller but older aircraft
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so we also have diesel engines and these are very modern uh engines the way
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that they're produced however they run off diesel
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or more commonly jets a1 fuel
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and the advantage of this is a lot cheaper to run
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it's a lot cheaper fuel it's a lot stronger as well
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and they're often based off car engines
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which are then adapted for aviation however the disadvantage with this is they do require heavy turbochargers to give it
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that extra power so they're generally a heavier engine
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but then they are more reliable and cheaper to run an aircraft on as well
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so more commonly what will be used is a horizontally opposed
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so that means the cylinders will be moving in a horizontal direction
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and normally a four cylinder or possibly a six cylinder on the aircraft
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and this is the most common type of engine it's very lightweight it's simple
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and that's what is the best for aviation to save weights
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and to make it easy to maintain
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so now we're going to look at the piston engine in
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a bit more detail as you need to know it for the CA exam
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and how it works and all the elements to it
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but the main purpose of the cylinder
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or the cylinder piston engine is to create chemical energy
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so petrol or fuel into kinetic energy so into a energy
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that we can use the crankshaft which is the central point of the engine
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and the connecting rod which is connects the cylinder
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and the piston converts horizontal motion into a rotary motion
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so that's what the cylinders are horizontally opposed within a piston engine
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and the the crankshaft will turn
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that horizontal motion into a rotary motion to turn a propeller
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or some kind of drive shaft
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so we need to look at the the stages of a
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four -stroke cylinder engine also known as the auto cycle
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and there's four main stages you need to know now in
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a four cylinder engine this these won't all happen at the same time all happen simultaneously
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So one cylinder will be doing one event, the other cylinder will be doing another.
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So the first stage is called the intake stage.
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Now that's where there's two valves.
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There's got an inlet valve where air -fuel mixture comes in, and then we've got an exhaust valve.
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And you can see those on the first number one picture, there's those two sort of T -looking shapes.
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The inlet valve is the top one, the exhaust valve is the bottom one.
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We've also got two magnetos as well, which are those things on the side of the cylinder wall, and then we've got the piston head,
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the cone rod, and the crankshaft lower down.
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So in the first stage, the piston moves down within the...
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Vocabolario e note di pronuncia per questa lezione
Questo video contiene 181 frasi e 2150 parole da ripetere con lo shadowing. Il parlato dura 14:33. Chi parla mantiene un ritmo costante di circa 148 parole al minuto, comodo per lo shadowing. Il 82% delle parole rientra nelle 3.000 più comuni dell’inglese; conviene studiare le altre prima di iniziare.
Vocaboli chiave di questo video
15 parole del video che vale la pena imparare, con pronuncia e significato:
| Parola | Pronuncia | Significato |
|---|---|---|
| cylinder sostantivo | /ˈsɪləndɚ/ | cilindro |
| horizontal aggettivo | /ˌhoɹəˈzɑn.təl/ | orizzontale |
| component sostantivo | /kəmˈpoʊ.nənt/ | componente |
| valve sostantivo | /ˈvælv/ | valvola |
| oppose verbo | /əˈpoʊz/ | opporre |
| aviation sostantivo | /ˌeɪ̯.viːˈeɪ̯.ʃən/ | aviazione |
| cabin sostantivo | /ˈkæbɪn/ | capanna, rustico |
| ventilation sostantivo | /ˌvɛntɪˈleɪʃ(ə)n/ | ventilazione |
| tail sostantivo | /ˈteɪ̯l/ | coda |
| structural aggettivo | /ˈstɹʌk(t͡)ʃəɹəl/ | strutturale |
| vertical aggettivo | /ˈvɝ.tɪ.kəl/ | verticale |
| poison sostantivo | /ˈpɔɪ.zən/ | veleno |
| expose verbo | /ɪkˈspoʊz/ | esporre, evidenziare |
| commonly avverbio | /ˈkɑmənli/ | comunemente, frequentemente |
| connect verbo | /kəˈnɛkt/ | connettere, connettersi |
I phrasal verb che sentirai
| Parola | Significato |
|---|---|
| go through verbo | attraversare |
| go up verbo | salire |
| write down verbo | sottoscrivere, annotare |
La grammatica di questo video
Le strutture che chi parla usa di più, con le parole esatte del video:
| Struttura | Nel video |
|---|---|
| Forma passiva be + participio passato — conta ciò che accade, non chi lo fa | is designed · will be required · is displayed |
| Frasi relative who / which + frase — un’informazione in più su una persona o una cosa | assembly which is · itself which will · exhaust which is |
Pronuncia a cui fare attenzione
Chi parla usa 45 contrazioni e forme ridotte, come they're, we're, we'll. Pronunciale nella forma breve, così come le senti.
- I suoni “th”: smooth /smuːð/, breathe /bɹiːð/, underneath /ˌʌndɚˈniθ/
- I suoni “sh” e “zh”: aviation /ˌeɪ̯.viːˈeɪ̯.ʃən/, ventilation /ˌvɛntɪˈleɪʃ(ə)n/, structural /ˈstɹʌk(t͡)ʃəɹəl/, examination /ɪɡˌzæm.ɪˈneɪ.ʃən/, efficient /ɪˈfɪʃənt/
- Parole lunghe — attenzione all’accento: horizontal /ˌhoɹəˈzɑn.təl/, aviation /ˌeɪ̯.viːˈeɪ̯.ʃən/, ventilation /ˌvɛntɪˈleɪʃ(ə)n/, examination /ɪɡˌzæm.ɪˈneɪ.ʃən/, integrity /ɪnˈtɛɡɹəti/
Come esercitarsi con questo video
- Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
- Fai shadowing frase per frase a velocità normale, ripetendo ognuna finché il tuo ritmo coincide con quello di chi parla.
- Registrati e confronta con l’originale, facendo attenzione a parole come cylinder, horizontal, component.
Cos'è la tecnica dello Shadowing?
Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.