Tag: Flying Lesson

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Aircraft Forced Landing Techniques

Posted on by Kai

A situation that requires a forced landing is something that most pilots would rather not experience while flying. But the reality is, that while uncommon, it could happen at any time. It’s a pilot’s job to be prepared. Like anything, practice makes perfect. In this blog we look at aircraft forced landing techniques.

To complicate things a little, there are a couple of different aircraft forced landing techniques a pilot may be instructed to follow. Knowing them all gives you more flexibility to make the right decision should the need arise. Lets take a look at both the traditional and alternative methods.

Traditional High Key / Low Key Forced Landing Technique

The High Key /Low Key technique is the method traditionally taught in most civilian flying schools across the world. This technique depends on your judgement of the trajectory of the flight in order to hit 1500 feet by your low key position, which is normally abeam your IAP (Initial Aiming Point) on a downwind.

Forced-Landing-Technique-High-Key-Low-Key
The High Key / Low Key method is the most commonly taught of the aircraft forced landing techniques

Some believe this technique to be somewhat flawed. There are a lot of factors to process in order to clearly judge the altitude of your aircraft in a glide at a particular arbitrary point. It also requires the pilot to be extremely knowledgeable about surrounding terrains and the elevation of the terrain they are flying over, which sometimes can be challenging.

Constant Aspect Technique

The Royal Air Force has developed a newer method, known as the Constant Aspect Technique. This method combats the issues of different aircraft, and the requirements for some undetermined judgements.

The principle of this aircraft forced landing technique is that it removes all the guessing of altitude and descent angle. It narrows down to one thing, which is called the “Sight Line Angle” or SLA. It is the perceived angle between the IAP of your landing field and the horizon.

Realistically, all you can look at during the forced landing with this technique is airspeed and the SLA.

Forced-Landing-Technique-SLA
The “Sight Line Angle” or SLA is the perceived angle between the horizon and the IAP of your chosen landing field.

The SLA is the “Aspect” which is part of this entire forced landing approach, and the “Constant” is basically the entire technique itself. The ultimate goal of the entire pattern is to keep your SLA constant as you approach the IAP.

How To Conduct The Constant Aspect Technique

The first step to fly this approach is to pick a landing field within safe gliding distance and meet the criteria set out by your instructor. Next, you can choose a sensible IAP within the first third of your landing field. This will be the “fulcrum” where your aircraft will pivot during the entire pattern, which ideally is a round pattern unlike the High/Low Key method with a rectangular pattern.

Forced-Landing-Constant-Aspect-Technique
The Constant Aspect Technique is one of the newer aircraft forced landing techniques.

Ideally, you will join what is equivalent to a crosswind. However, depending on wind direction, it may be a direct downwind or a midfielder crosswind join into the “circuit”. It is important that your bank angle does not exceed 20 degrees during the approach. Otherwise, you may risk the SLA either increasing or losing airspeed and glide ratio due to the reduced vertical component of lift and increased drag.

If your SLA is increasing (getting too high), deviate from best glide speed or increase spacing.

If your SLA is decreasing (getting too low), decrease spacing, fly inwards.

When approaching final, you must make the turn in to directly approach your IAP. This is the time when you decide, using your knowledge of the trend of your SLA, whether you:

1. Cut in short

2. Fly a standard final, or

3. Overshoot and then turn back onto final depending on your height.

If the SLA is high, you have three options to get back onto glide path. You can use flaps, do S-turns or do a steep slip, or you can combine S-turns and steep slips if it is ridiculously high.

This technique is not only used by RAF but also being slowly accepted by flying schools around Europe and the UK.

It is recommended that everyone should practice the entire pattern all the way down into the flare and touchdown. You will find out, if you really are ridiculously high, you can still hold the slip into the flare, centralise the rudder when the aircraft sinks, and then continue to flare.

Experiment With Aircraft Forced Landing Techniques

Chat to your flight instructor about which method they prefer and why. Proactively seek to practice both aircraft forced landing techniques, so that you know which one you feel more comfortable with.

Thanks to LTF student pilot Howard Lau for contributing this article on aircraft forced landing techniques. For information on our flying courses, email [email protected]/en or go to https://drift.me/learntofly/meeting to book a meeting and school tour. You can also get more handy flying tips by clicking below and subscribing to our YouTube channel!

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How Flying Critical Incidents Can Occur

Posted on by Kai

When an aircraft flying under Visual Flight Rules (VFR) enters Instrument Meteorological Conditions (IMC), flying critical incidents can sometimes occur. In most cases, this is due to reduced visibility or inadvertent entry into clouds. Both of which happen because of the loss of the natural horizon.

Unfortunately, such flying critical incidents have cost the lives of many pilots.

You hope it will never happen to you

Before I began my pilot journey, I always seemed to find the time to read unfortunate accident reports where a non-instrument rated pilot on a VFR flight enters IMC. It is even more unfortunate to realise that many of these incidents become fatal accidents. The more I’ve read, the more I’ve tried to make myself believe, ‘It will never happen to me!’

For non-pilots, all of these accidents seem preventable. Reading the Terminal Area Forecast (TAF) and good weather knowledge are all valid and effective strategies to combat any similar occurrence from happening. However, today I will write about a time when this happened to me on a training flight, nonetheless with an experienced instructor on board.

The importance of sharing stories

Before undertaking the task of writing it, I had been wondering about whether or not I should really share my story. However, I made the decision to do so knowing it could help educate other pilots and student pilots about when flying critical incidents can occur.

Cloudy conditions and lower visibility

It was a very cold morning after a cold front came through the day before. I checked the METAR of Hong Kong International Airport and the forecast indicated cloud covers clearing and rising to 2500 feet with 9 kilometres of visibility. However, as I arrived in the flight operations office, we received PIREPs from other pilots of temporary visibility reduction to an estimate of fewer than 3 kilometres near the high ground. I knew this could become an issue upon exiting the airfield area into the training area via a gap in the mountains.

The aircraft from previous slots were rocking the circuit and about to finalise their return. Skies above Shek Kong Airfield were clearing and let in some warm sunlight. However, the area towards the exit route (Kadoorie Gap) into the training area was still rather cloudy. I saw clouds on the other side of the mountains and thought this could really be an issue for our flight today – we had some instrument flying planned.

Climbing to 1500 feet

My instructor had nearly 40 years’ experience in the UK as an aerobatic pilot and warbird pilot. He also holds an Instrument Rating – Restricted on his CAA license – although on his Hong Kong license he does not hold such rating. Even so, his instructor rating allows him to teach basic instrument flying and tracking. On this day, despite the clouds, I put my trust in his judgement and was well aware of his capabilities since we had flown together numerous times.

We taxied out to the runway after our run-up checks, only to notice something very strange. Our slot was supposedly fully booked out with our entire fleet expected to fly. However, there was no action on the aircraft apron. I recall looking to my right as I prepared to shift into full power for takeoff and witnessing all the aircraft sitting idly, waiting for the weather to clear. Still, I thought there was no time to waste and we took off.

We climbed to 1500 feet and tracked towards the exit. As soon as we switched frequencies for traffic information service we heard a rescue helicopter saying, “Visibility deteriorating to less than 3000 meters.” I wasn’t sure where the helicopter was, but in retrospect, it really should’ve been the warning to turn back. We pressed on and exited out of the mountain gap and went on to “the other side,” where all the nasty clouds were, maintaining 1500 feet all the way through.

Scary in-flight sights

As soon as the mountains disappeared from my peripheral vision, my instructor and I realised that visibility was not 9 kilometres, as we had initially projected, and I could only see what was in front of us by looking downwards.

The only visibility I had was of the ground below, including the roads, trees and buildings of Tai Po. I looked back and realised that our only escape route back to the airfield would be obscured if we kept going. Just as I was about to turn back, it became apparent that my instructor had the same idea in mind. “Bring us back,” he said.

Returning through the mountain gap

The direction indicator on that particular Cessna 172 was somewhat defective. This meant I started my timer on my watch and began a rate one turn to the left. I timed for 1 minute, which at 3 degrees a second would be a full 180-degree turn. Fortunately, the mountain gap remained in view this entire time and I instinctively throttled up to return quickly. We were pushed even lower as we entered the airfield airspace, finally descending to 1300 feet. It was very uncomfortable watching the mountains on either side of me come so painfully close.

Lessons learnt

Of course, we were fortunate that despite this being a VFR into IMC incident. The visibility was still sufficient for a safe turn-back manoeuvre.

Among the contributing factors to the success of this was the expertise of my instructor, who holds a restricted instrument rating in the UK, and the fact that at this time I had already completed an hour of instrument flight training. A serious lesson in how flying critical incidents can occur.

After landing, and during the debrief, we narrowed the causes down to the ‘get-there-itis’ that occurred as a result of wanting to squeeze more instrument flying time in for me and also the fact that my instructor was instrument-rated and we put such confidence in his expertise. In retrospect, we shouldn’t have even left the ground in the first place.

This flying incident is proof that pilots with any amount of experience can be sucked into this veil of complacency. They then can make decisions which go against rational and safer judgement. It is an incident my instructor and I will both go on to remember.

Safe flying everyone!

Flying-Critical-Incidents
When an aircraft flying under Visual Flight Rules (VFR) enters Instrument Meteorological Conditions (IMC), flying critical incidents can occur.

Thanks to LTF student pilot Howard Lau for contributing this article on how flying critical incidents can occur. For information on our flying courses, email [email protected]/en or go to https://drift.me/learntofly/meeting to book a meeting and school tour. You can also get more handy flying tips by clicking below and subscribing to our YouTube channel!

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Final Flight Departure Procedures: Flight Departure Processes Part 3

Posted on by Kai

In this blog series on flight departure processes we have covered engine starts, taxi checks, run-up checks and more. Now it’s time to run through the final flight departure procedures and take to the skies!

Use the TMPFISCH acronym

The proper acronym that applies whenever holding short is TMPFISCH, and it is what I usually use for my operations here in Hong Kong. It goes like this:

T – Trims set to the appropriate take-off position

M – Mixture rich, master on and magnetos on both

P – Primer in and locked (or fuel pump off)

F – Fuel is sufficient for the coming flight and flaps are set

I – Instruments’ Ts and Ps are in the green range

S – Switches (landing and strobe lights on)

C – Controls full and free

H – Hatches secure and harnesses secure

When you do your controls part of this departure check, make sure your box the controls. That means to move the controls in a movement of a box and ensure you have still got adequate freedom of movement. You might have a mile-long taxi, and something might have jammed the controls. Never skip this check as part of your final flight departure procedures.

Deliver your safety brief

You can do the EFATO brief (Engine Failure After Take-Off ) at any stage before the take-off, but I typically do it after run-ups. A typical brief should describe the actions that need to happen in the event of an engine failure at particular stages of the flight, such as:

During take-off

After rotation

Below 200 feet and with runway remaining

Above 200 feet with no runway remaining

Above 700 feet.

The brief goes something like this:

“If we have an engine failure on the ground, we stay on the ground. If we have an engine failure below 200 feet, we land on the remaining runway. If we have an engine failure above 200 feet, we land straight ahead or 30 degrees to the side. If we have an engine failure above 700 feet, we will turn back to find runway X.”

On a standard Cessna or Sling, 700 feet is plenty for a runway turn-back manoeuvre. However, during the turn back you MUST lower the nose to maintain airspeed and limit the angle of bank to 45 degrees. Never attempt a runway turn-back if an engine failure occurs below 700 feet!

Ready to go

You are lined up on the runway, and ready to take to the skies. It’as always an exciting moment for any pilot. However, discipline must be maintained during the final flight departure procedures.

Ensure you are on the correct runway by looking at your directional gyro, which will indicate the proper runway heading. It’s also a good practice to cross-check this reading with the magnetic compass as well. After that, you should triple-check with making sure that the runway numbers are indeed the intended runway. Everything checks out? Good.

Time to fly!

Now the take-off roll can begin. Ensure that your heels are on the floor and that you are controlling rudders only with the balls of your feet; this will ensure that you do not inadvertently apply the brakes! After you complete this, you should use full power – smoothly but with purpose – and count three, one-thousands before going all the way with to full strength.

After full power is applied, check on the RPM. They should be reading at or above the stated minimum static full-throttle RPM. At this stage, you should also check the oil temperatures and pressures and ensure that these are still sitting within the green range. Finally, you should check to ensure that the airspeed indicator is ‘alive’, meaning that it is indicating an acceleration.

At rotation speed, gradually apply back pressure and lift the nose wheel off the ground, allow the aircraft to fly off the runway and then adopt a Vy (best rate of climb) attitude to ensure maximum climb performance. Look outside! Once you are above 300 feet AGL and obstacles are cleared, move the flaps to up and auxiliary fuel pump (if applicable) to off. You should once again check the oil temperatures and pressures.

The result of following the correct final flight departure procedures? A smooth take-off, followed by another safe and beautiful flight!

Thank you to student pilot Howard Lau for contributing this great series on flight departure procedures.

IMSAFE-For-Pilots
With the final flight departure procedures done, it’s time to fly!

Find out what it feels like to take to the sky! Email [email protected] or visit https://drift.me/learntofly/meeting to book a meeting and school tour.

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Flight Pre-Departure Checks: Flight Departure Processes Part 2

Posted on by Kai

In Part 1 of our flight departure processes series, we laid the groundwork to set ourselves up. In this post, we will go through your flight pre-departure checks. This includes engine starts, taxi checks and run-up checks. Following these checks we’ll be heading to the runway.

Perfect priming

Let’s start our flight pre-departure checks with the most important thing. Safety. Crack open the window and say, ‘CLEAR PROP’. Make sure you give people time to stand clear and scan the area before you move on with your other procedures.

Next, place one hand on the throttle and start cranking the starter, but for no longer than ten seconds each time. If the engine does not fire within 10 seconds, stop cranking right away and wait a minute so the starter motor can cool down. Try some light priming when you’re ready to have another go—it works wonders.

When the engine fires, release the starter promptly. If you’re flying a plane with a fuel-injected Lycoming engine, adjust the mixture to full rich.

Green means go

After a successful engine start, you will need to check that the oil pressure is rising (or has correctly risen) into the green range. This is crucial because oil pressure indicates whether metal components in the engine are sufficiently lubricated.

If oil pressure is not within the green range, shut the engine down immediately and report this to the engineer.

As long as the pressure looks good, you can raise the flaps (if left down after pre-flight), turn on the taxi and navigation lights, and turn on the avionics master switch. Only now should you don and adjust your headsets.

Eyes forward

When taxiing, you should aim to minimise the time you spend with your head down – literally so you don’t bump into anything.

It has become normal for pilots to use GPS devices and iPads (used to run apps like OzRunways) in the cockpit. It is ironic, therefore, that when we attempt to program devices while taxiing we put ourselves at risk of having an accident.

The only exception I make to this rule of my flight departure process is to check the turn instruments. I like to quickly glance down and ensure that:

The slip ball is deflecting properly

The turn coordinator is indicating correctly

The direction gyro turns in the proper direction

The attitude indicator stays erect

The magnetic compass turns in the proper direction.

Remember the CIGAR acronym

I like to do my run-up checks using the acronym ‘CIGAR’. Here is how it works:

Controls – full and free and control surfaces deflect correctly

Instruments – all in the green range, the ammeter is charging and the suction is in the green range

Gas – check the mixture and fuel selector

Airframe – secure the canopy, doors and windows, and make sure your parking brake is on

Run-up – set the correct run-up RPM, check the brakes, check the magnetos, note when the RPM drops (on the Sling with the 912iS engine, one must check that both engine fuel pumps are working), pull the throttle to idle and ensure the engine does not seize at idle

After the run-up, the engine should be set to the ground idle speed as recommended in the POH.

Thank you to student pilot Howard Lau for contributing this great series on flight departure procedures. Stay tuned for the third and final instalment coming soon, as we head to the runway!

Flight-Pre-Departure-Checks
CLEAR PROP! Safety comes first when completing your flight pre-departure checks.

Find out what it feels like to take to the sky! Email [email protected] or visit https://drift.me/learntofly/meeting to book a meeting and school tour.

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Flight Departure Processes: Part 1 of 3

Posted on by Kai

With so many other things in life, it’s easy enough for you to just remember something once you know it. Then it’s no problem to repeat it. Like driving. But flying is different. There are checklists and acronyms (and more checklists) for a reason. There are far more safety considerations when you are flying, and following the right flight departures processes will help to ensure you have a smooth and safe flight, every time.

Walk the walk

A successful and safe flight begins before you even turn on the master switch. It all starts on the tarmac as you approach the aircraft. Your flight departure processes should involve asking yourself lots of questions:

Are the tie-downs done properly?

Are the tyres inflated correctly?

Is there any pink hydraulic fluid around the aircraft?

Is there any blue fluid around the aircraft reminiscent of Avgas?

It has been scientifically proven that asking yourself questions is the most effective way to stay in the loop of information.

Feel the wind

You should not only ask yourself about the aircraft or about the ‘now’ but also ask questions that will bring into effect a successful take-off. Personally, I like to ask myself these:

Should I use flaps or not?

What technique will I use for these conditions? Short field or normal?

Should I delay my rotation for density altitude, load or gusts?

What crosswind correction should I be using during taxi and initial roll?

These questions really are the basis for me completing smooth and safe flight procedures. They help me make sure I’m always ready to respond to new information. On that note, try to make sure you always pay attention to your surroundings. Feel the wind, look at the windsock, listen to the wind and feel the temperature on your skin. Forming attentive habits and looking out for these cues will allow you to prepare for a better flight.

Take it easy

After a normal interior and exterior pre-flight check has been completed, and the aircraft is confirmed to be in safe working order, we can proceed to the engine start. My secret tip is don’t rush!

I’ve had the fortune to fly with the training captain of a major airline in Hong Kong, who is also a tailwheel aircraft instructor and aerobatic pilot. He said these wise words I will never forget, ‘Don’t rush because if you rush you will kill yourself one day.’ I could not believe the severity of his words given his experience in aviation! Needless to say, I listened to his advice.

Get ready for ignition

Before I start the engine, I like to plug in the key, and with the master switch off, I rotate the key to start and then release it. The key should immediately snap back to the both position. This is a simple pre-start ignition check that I learned during my time as an aircraft maintenance intern in Hong Kong.

What this check does is make sure that the starter motor does not engage when the master switch is off, the key locks into position properly and the spring mechanism works.

Prepare the cabin

With the pre-start ignition check completed, I check the cabin. This is when you should adjust your harnesses and seats to your satisfaction, and keep a window or the canopy open. After ensuring that the propeller area is clear, flip on the beacon light switch and the master switch.

Look at your ammeter—it should show a discharge. Check your oil temperature to gauge the amount of priming required or (if it’s the Rotax 912ULS equipped Sling 2 or the Bristell at Learn to Fly) the use of choke. Ensure all circuit breakers are in and the avionics master switch is off.

Wait for it

One of my pet peeves at this stage is pilots who don their headsets before the engine has started. What if someone was trying to get your attention about an unfolding emergency? With the headset on, you wouldn’t be able to hear them. Instead, remove the headset from the dashboard and put it on your lap so you can have maximum visibility out of the windscreen.

An unwritten rule

Set the fuel selector in accordance to the POH and prime as required. After priming, ensure the primer pump is in and locked or, alternatively, that the auxiliary fuel pump is off. If the plane has a fuel-injected Lycoming machine, check that the mixture is set to full rich. If you’re ever in doubt, start with no prime. This will avert the possibility of flooding the cylinder heads due to excessive priming.

Thank you to student pilot Howard Lau for contributing this great series on flight departure processes. Stay tuned for the next part, where we run through flight pre-departure checks.

Flight-Departure-Processes-Female-Pilot
Getting your flight departure processes right ensures the safest start to your flight.

Find out what it feels like to take to the sky! Email [email protected] or visit https://drift.me/learntofly/meeting to book a meeting and school tour.

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