Ask The Pilot

  • Thread starter Thread starter NM
  • Start date Start date
  • Featured
Does this imply that you simply sit at the end of the runway and wait (blocking it - no offence meant) or do you exit the runway and let the 'usual suspects' overtake you and then you go when you are happy with the weather?


No, you taxi on to the runway, have a look, then move forward to the first exit that you can use. You wait on an adjacent taxiway. Last time I did this I was the first to 'wimp out', but ended up with quite a few others joining us on one of the parallel taxiways. I don't recall exactly, but I don't think we delayed by more than 20-30 minutes, and as the weather passed over us, it was a case of being really glad I was on the ground.
 
Sorry, I've been reading this thread for a while but what is N1, N2 and N3?

http://history.nasa.gov/SP-468/ch10-3.htm

A jet engine consists of a compressor at one end, and a turbine at the other, joined by a shaft. The compressor compresses air before it enters the hot section of the engine, and the turbine (downstream of the combustion chambers) produces the power to drive the compressor.

If you make the shaft hollow, and run another shaft through it, connected to its own set of compressors and turbines, you've made a twin spool engine (GE). Put a third shaft in (getting complex now) and you've made a triple spool (RR).

The lowest pressure turbine is the one furthest from the core of the engine. It drives the blades (or fan) that you can see at the front of the engine. It's the one we call N1. N2/3 are the logical progressions. Turbine speed is expressed as a percentage of the maximum allowed speed.
 
JB, the temperature in Melbourne today is expected to reach 40C. What effect does this high temperature have on take-off performance?
 
Jb, how much technical knowledge does an airline pilot have to have? Are you expected to understand inside and out how every system on the plane works? Do you learn engineering in flight school?

You certainly need a working understanding of how things actually function, but you don't need an engineer's knowledge of them. When I was on Pilots' Course, the RAAF went very deeply into exactly how all of the boxes, engine, fuel control unit, etc. worked on the Macchi. You didn't actually need to know it to fly the aircraft, but they were thinking that it represented a generic jet aircraft, and that its systems would at least be similar to any aircraft we'd fly in the future. So, I don't need to know about half ball valves to fly a digital FCU A380, but I do know that the digital systems are doing the exact same things that were done by valves in an earlier generation, and for the same reasons.
 
JB, the temperature in Melbourne today is expected to reach 40C. What effect does this high temperature have on take-off performance?

It reduces the available power. Flights out of Melbourne aren't normally at max take off weight, but if you were performance limited, then it would have the effect of reducing the available weight.
 
Hey JB,
Was watching this video earlier ( A340 - Los Angeles - KLAX 25R approach with sidestick - YouTube ) and in the last 60 seconds or so after landing the automated voice in the coughpit is heard advising the length of runway left to run. I couldn't recall ahving heard this before and thought I would ask if it's somehting on just the A340 or older AB's or just an option available if the pilots want or airlines place in SOP etc?

Also, once landed the captain switches his hand from the joystick to something else beside it, what is that and what is it used for?
 
Was watching this video earlier ( A340 - Los Angeles - KLAX 25R approach with sidestick - YouTube ) and in the last 60 seconds or so after landing the automated voice in the coughpit is heard advising the length of runway left to run. I couldn't recall ahving heard this before and thought I would ask if it's somehting on just the A340 or older AB's or just an option available if the pilots want or airlines place in SOP etc?

I haven't heard that system before either. Presumably an option. Doesn't strike me as all that useful to be honest.

Also, once landed the captain switches his hand from the joystick to something else beside it, what is that and what is it used for?

Nose gear steering tiller....
 
Pretty much as usual. I think that in 28 years, I've had only about five Xmas days off, though I never minded them in Singapore.
So JB what are your plans for Christmas Day? Where are you put up in London? Does the crew have lunch & party hats together? Or is it just another day as you are not with your family?
 
So JB what are your plans for Christmas Day? Where are you put up in London? Does the crew have lunch & party hats together? Or is it just another day as you are not with your family?

No plans really. We arrive that morning, so I expect I'll have a sleep over lunch. The cabin crew are London based, and will head off to their homes. I think it will be just another lost day in paradise...with the added bonus that everything will be shut. That's why I always liked Asia if I had to be away...it's just a normal working day in most places.
 
Morning JB, my question also relates to pilot training. I am reading a book by a famous investor who talks about the lack of multidisciplinary models being used by professionals to solve problems (eg. A man with a hammer only sees nails). He goes on to say that colleges should take a leaf out of the way pilots are trained to look at problems by using a variety of mental models (eg. engineering (backup systems), psychology (cognitive biases), mathematics (eg calculating fuel loads, fuel burned in x time in an emergency), biology (reward systems)) as well as using a thing like a check-list that can help remove bias. Can you please give a run-down on how these models were taught to yourself and how someone who is not training to be a pilot but would love to learn about the approach to training and problem solving can go about it?

Of course, I don't see what I do as being multi disciplinary at all...it's just what a pilot does. When I look back at the RAAF Pilots' Course, you see that whilst much of it was taught by the flying instructors, some of the ground subjects were taught by specialists. Met by a meteorologist, ATC by a controller, navigation by a navigator, Avmed by a doctor, engineering by an engineer. In all cases the subject could have been covered by one of the QFIs, but not to the same depth.

Once you leave the military, it tends to be more by osmosis. For instance, nobody teaches pilots how to deal with passengers, but we follow the examples we see from those 'old and bold' Captains that we all flew with. We actually tend to be very bad 'students' when the company decides to have mixed cabin/tech crew classes, as they sometimes do in EPs, because we tend to find that our whole mindset has been coloured by the idea that "the aircraft is moving at 1,000 feet per second...it will get there whether you are ready or not", and so classes that beat about the bush, really annoy.

When teaching new pilots to fly, one thing you almost always have to work on is decision making. The aircraft will always get there, but ideally you want your mind to get there first. Mucking about, playing with all of the options you may think you have, simply amounts to procrastinating. Once the aircraft is ahead of you, you've become a passenger. I remember telling many a student to just 'make a decision'...initially it doesn't matter whether it is right or wrong. Work on getting the decision made...and eventually the accuracy will improve too. Do it the other way around, and he'll always make the right decision, but too late to use it...so it's now the wrong one.

The maths...well that just underlies everything. Fairly simple trig and geometry will cover most navigation issues. Here's something for you to play with...you're over Australia, flying from (say) Perth to Sydney. At approximately Mildura, you're advised that Sydney has closed. Find the limit that you could safely fly to, in every direction (i.e. not just one solution, but all of them), using a map, a piece of thread and a pin or two. Ensure you allow for the known average wind.

I see aviation as always building on the shoulders of whatever came before. QF doesn't go back and reteach things that were covered by the RAAF (or whatever your previous life). They assume you actually know that stuff, and move to new items that they know you'll not have covered. Manufacturers normally don't take a bunch of new engineers from university, and tell them to design from scratch...they normally build on what has worked previously.
 
On another thread http://www.australianfrequentflyer....discussion/how-much-have-you-flown-56077.html I asked how much AFF members have flown this year.


How much have you flown this year, JB? Is this a typical year for you?


How do you keep track of your flights?


It would be interesting to compare the figures that some of us have shared on that thread compared to a long haul pilot.

This year was anything but average. I took a substantial amount of leave early in the year, and had barely gotten back when I had a medical issue with my licence. So I spent well over half the year on the ground, wishing I was in the air....
 
JB - first of all, season greetings and thanks for another year of sharing your experience with us.

Can you recall/were you privvy to what sort of flight-time-to-ground-maintenance-hours the Navy A4's used to have? I was in the ATC in the mid eighties, and at a bivuoac at Williamtown, seem to remember they told use the Mirages were getting so old, the flight hours to shop hours ratio was insanely small.

And while I appreciate a military aircraft will get less use per hour than a civilian one, how do the numbers compare with a typical four engine widebody (747/A380)?
 
Can you recall/were you privvy to what sort of flight-time-to-ground-maintenance-hours the Navy A4's used to have? I was in the ATC in the mid eighties, and at a bivuoac at Williamtown, seem to remember they told use the Mirages were getting so old, the flight hours to shop hours ratio was insanely small.

And while I appreciate a military aircraft will get less use per hour than a civilian one, how do the numbers compare with a typical four engine widebody (747/A380)?

Interesting question...and I'm sorry but I have no idea of the answer.
 
Congratulations on getting declared good to go by CASA. Medical checks are probably a necessary evil but it has such serious consequences for a career so the stress and wait times must be really painful.
I saw the latest rulings on lithium batteries. If a lithium battery misbehaves/shorts out in the passenger cabin do you have a containment insulated box to use on board ?
 
I saw the latest rulings on lithium batteries. If a lithium battery misbehaves/shorts out in the passenger cabin do you have a containment insulated box to use on board ?

There is no dedicated containment box. Lithium batteries are a bit of a moving target, and the rules relating to them have been changing rapidly.
 
What are the "rules" for lithium batteries? And is that what ipads, ipods, iphones and other gadgets have in them? If so, and if these batteries are a problem why are they allowed on board at all?
 
Ask The Pilot

Hi JB,

A simple question - away from the uber tech of thrust levers ....

Soft vs Hard landing

Would a pilot always be boxed in as a Soft or a Hard lander ?

Or that is entirely out of his control : winds, weight etc.....

Some flights you'd hardly notice the plane has landed whereas some other flights land with a thud.

What are the variables that determine if the plane is going to have a soft vs a hard landing ?

Many thanks for your knowledge

Ps: waiting in line for some sushi @ Tsukiji Market, Tokyo (QF21 landing 4 hrs ago - with a thud !)

ImageUploadedByAustFreqFly1387761301.439532.jpg
 
Last edited:
Turn business expenses into Business Class! Process $10,000 through pay.com.au to score 20,000 bonus PayRewards Points and join 30k+ savvy business owners enjoying these benefits:

- Pay suppliers who don’t take Amex
- Max out credit card rewards—even on government payments
- Earn & Transfer PayRewards Points to 8+ top airline & hotel partners

AFF Supporters can remove this and all advertisements

Become an AFF member!

Join Australian Frequent Flyer (AFF) for free and unlock insider tips, exclusive deals, and global meetups with 65,000+ frequent flyers.

AFF members can also access our Frequent Flyer Training courses, and upgrade to Fast-track your way to expert traveller status and unlock even more exclusive discounts!

AFF forum abbreviations

Wondering about Y, J or any of the other abbreviations used on our forum?

Check out our guide to common AFF acronyms & abbreviations.
Back
Top