Ask The Pilot

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Brakes will often still be at 200c or so when we push back, and it isn't hard to put another 100c into them during the taxi out to the runway.

What are the discs made of? I thought that they were carbon fibre. Which begs the question - doesn't it take a fair bit to warm up and doesn't carbon fibre cool quickly? I know that on MotoGP racing motorbikes the carbon fibre brakes need a fair bit of heat in them before they start gripping at their best.

And presumably, forward motion, particularly at the speeds aircraft reach, would help cool them anyway via airflow over them, wouldn't it?
 
What are the discs made of? I thought that they were carbon fibre. Which begs the question - doesn't it take a fair bit to warm up and doesn't carbon fibre cool quickly? I know that on MotoGP racing motorbikes the carbon fibre brakes need a fair bit of heat in them before they start gripping at their best.
Carbon...but I don't think carbon fibre....

Getting them hot isn't an issue. There is a lot of heat in the slightest use when you're stopping hundreds of tonnes.

And presumably, forward motion, particularly at the speeds aircraft reach, would help cool them anyway via airflow over them, wouldn't it?
Yes, it will cool them...if we were to leave them hanging in the breeze. But leaving the gear out for any time longer than normal after take off has heavy performance penalties.
 
Yes, it will cool them...if we were to leave them hanging in the breeze. But leaving the gear out for any time longer than normal after take off has heavy performance penalties.

Yeah, I was refering to the time that they're left dangling under normal conditions...

How are the temps measured? ie. what devices are used?
 
This thread is now so long I have forgotten what questions have been asked, so forgive me if this has been answered before

What aircraft use what measurement of speed ? We have kt as well as km/h and mph.

I assume mph is used by the US because they don't know the others exist.

Do you need to do any conversions ?
 
This thread is now so long I have forgotten what questions have been asked, so forgive me if this has been answered before

What aircraft use what measurement of speed ? We have kt as well as km/h and mph.

I assume mph is used by the US because they don't know the others exist.

Do you need to do any conversions ?

The Americans know about knots.

As far as I know, everyone (in the West anyway) uses knots for airspeed. Any other figures that you see are simply conversions so that those knot in the know will understand. There are never conversions required in flight.

It becomes trickier when reading weather reports. The US uses statue miles or feet, whilst virtually everyone else uses metres and km. The same with the minima on approach charts. Altitude is in feet...unless you're in China in which case it's metres.

Of course the airspeed isn't just the airspeed either. We use indicated airspeed (or more correctly calibrated airspeed) at lower speeds and levels, and mach number in the higher range. At low altitudes, airspeed defines the maximum and minimum speeds available, whilst at higher levels it defines the minimum, whilst mach defines the maximum. And if navigating, you need to apply the wind to your true airspeed to get a result.
 
Yeah, I was refering to the time that they're left dangling under normal conditions...

How are the temps measured? ie. what devices are used?

They aren't left in the breeze for long on most occasions. The gear is selected up the instant we are positively off the ground. I don't know how it is measured...I've tried touching one...but that just gave me a 'burnt' answer, and I won't do that again.
 
They aren't left in the breeze for long on most occasions. The gear is selected up the instant we are positively off the ground. I don't know how it is measured...I've tried touching one...but that just gave me a 'burnt' answer, and I won't do that again.
Thanks.

And yes, the "digital" thermometer method of measurement is usually a once off thing.

Question: when you started commercial flying was it with AA or QF? I'm interested to know how you guys might've transitioned from domestic to international ops back before the two airlines became one big happy family.
 
Question: when you started commercial flying was it with AA or QF? I'm interested to know how you guys might've transitioned from domestic to international ops back before the two airlines became one big happy family.

I went from the RAN to QF long haul.

I don't know that it ever became one happy family....there were some very different agendas at play there. '89 changed at lot of things.
 
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I don't know that it ever became one happy family....there were some very different agendas at play there. '89 changed at lot of things.
Yes, my comment was slightly tongue-in-cheek.

I remember hearing about the different unions harrassing flight crew too, when the two merged.

If the split happens I'll bet that there will be quite a few senior captains flying domestic who will be somewhat upset if a promotional path is denied to them...
 
I remember hearing about the different unions harrassing flight crew too, when the two merged.

I don't think there were different unions in play then. 89 was all about union busting, so the domestic people were mostly non union. AIPA was the QF union, but it was a company union only.

If the split happens I'll bet that there will be quite a few senior captains flying domestic who will be somewhat upset if a promotional path is denied to them...

I'm really not sure how, or even why, they would need to go to two pilot groups. It would have the effect of totally destroying promotional paths for both groups, at all rank levels.

Have you heard of the Chinese famine theory? You have two villages, both in famine. You take all of the food from both. If one has a better history of loyalty (or whatever measure you like), then give all of the food to that village. If they are both the same, then randomly pick one. The village with the food will be grateful (and loyal), and the other villagers will be dead, so they don't matter.
 
I don't think there were different unions in play then. 89 was all about union busting,
I was refering to the merger of Australian and Qantas.

When you joined Qantas, presumably it was when AA was still a separate entity. What were your career opportunities before the merger?

I'm really not sure how, or even why, they would need to go to two pilot groups.

Bean Counters (and therefore, management) wouldn't care, would they? They would simply look at the bottom dollar and the theory of divide and conquer.

Have you heard of the Chinese famine theory?

No, I haven't. But the concept is familiar.

How's your EBA progressing? Because I'd bet that Capt. BJ and his crew would be looking at that side of things too.
 
I was refering to the merger of Australian and Qantas.

When you joined Qantas, presumably it was when AA was still a separate entity. What were your career opportunities before the merger?

I reached a command before any involvement with AA, so my career sequence wasn't affected.



Bean Counters (and therefore, management) wouldn't care, would they? They would simply look at the bottom dollar and the theory of divide and conquer.

No, I haven't. But the concept is familiar.

How's your EBA progressing? Because I'd bet that Capt. BJ and his crew would be looking at that side of things too.

We're off into industrial relations, which I won't discuss here.
 
Hi JB

Thanks for your excellent and knowledgable input on this thread particularly and AFF in general.
On a lighter note, the Fin Review says QF is going to issue iPads for all pilots.
Article states will include all charts and manuals (subject to regulatory approval.)
See
iPads flying high with Qantas pilots

Is the story correct?
Little bit less to lug around or are the charts and manuals kept permanently on board each aircraft?
And will you have to turn your iPad off for take off and landing like the rest of us down the back?
 
Hi JB

Thanks for your excellent and knowledgable input on this thread particularly and AFF in general.
On a lighter note, the Fin Review says QF is going to issue iPads for all pilots.
Article states will include all charts and manuals (subject to regulatory approval.)
See
iPads flying high with Qantas pilots

Is the story correct?
Little bit less to lug around or are the charts and manuals kept permanently on board each aircraft?
And will you have to turn your iPad off for take off and landing like the rest of us down the back?

Yes, it was announced to us in a letter from the Chief Pilot a few days ago. The exact details are unknown, but apparently it will have the Jeppesen app, which completely replaces about four cubic feet of charts and docs that are carried on every aircraft. I gather the roll out will by aircraft type, with the 380 getting them last, presumably because it already has a computerised system (which we've discussed previously, and which basically doesn't work).

Other applications that will need to be incorporated will handle performance calculations, and the aircraft flight manuals. The current (Airbus written) 380 performance apps do work quite well, but have limited ability to handle complex failures (as per the 32), and so do need to be redone. The manuals were a bit of a first attempt at making a hyperlinked manual system, and whilst they work well in some instances, are almost impossible to study from, so again a rewrite is something that is needed.

Within the aircraft there are varying changes across the fleets. Most of the aircraft have laptops for use in performance calculations, whilst the 380 (in theory) has the laptop doing everything from performance, to manuals, to interfacing with the aircraft system for maintenance and ACARS access. The Panasonic Toughbooks that have been used are terribly slow, and often unreliable, as well as being very expensive. I suspect that from a maintenance point of view, getting rid of them would be a positive. That leaves us with access to ACARS, and maintenance...well the engineers can carry their own machines on board an use them to interface with the aircraft. Not sure about how to do the ACARS, but as it was accessed via an FMC in the 747, I'd be surprised if the same thing isn't possible with a software update on the 380.

Potentially, it makes the OIT and the keyboard redundant in the 380, but as neither are shining examples of technology, I doubt they'd be missed.

If we have to turn them off, it defeats the purpose, so no, I don't think we will. Remember though, that the exact piece of equipment is controlled, and there will be a test flight or two, with the gear in particular places on the aircraft, before being certified.

I gather that once they are fully issued to a fleet, that the books on board will be reduced to one set for a bedding in period, and then removed entirely.

The use of these systems opens up other options too. Flight plans can be sent to the crews. They will be 3G/wifi enabled....so they just need a system that places some wifi routers in useful places. Standing orders, and the various other notices that we get, plus manuals updates can be pushed out, instead of waiting for someone to visit their physical mailbox.

I doubt that it has been a simple project, but potentially it has a lot of upside....not the least of which old blind pilots (like me) can much more readily read an ipad than we can the tiny print on the paper charts.

We already have an example of how it can be done. A few of the pilots have created their own system, using 'Sugarsync' and 'Goodreader', that automatically updates around 5 gig of A380 related data. It works well, but isn't all that flexible. Given that it was done with a budget of zero dollars, it isn't a bad effort.

Downside? Well, there can't be too many. Some sort of power charging system will have to be provided, but all of the aircraft have a high voltage outlet somewhere in the coughpit, so they may be suitable. From a personal point of view it's something more for me to lug around, and depending upon just how things are implemented, I may, or may not, need to keep carrying my own personal ipad around as well. We'll have to wait and see on that. Issues like security, loss, breakage, etc also have to be addressed (I'm sure they have been, but I don't know the details).
 
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Just how much paper (kg/volume) do you now carry or is in the aircraft ?
The bit about (blind) pilots worries me. :). I had to clean my glass's to read that again !
But the reality the only time I am concerned is when the pilot is younger than the aircraft.
 
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We personally don't carry any...although I have a complete set of everything on my laptop/ipad.

QF has always had sets on the aircraft, although other airlines have had pilots carting around individual sets...at 20-30 kgs each. So much for luggage.
 
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Highest I've seen is about 550c. Normally they are around 400c, but with 16 brakes sets you often have quite a range across them, with one or two both high and low.

Our take off temp limit is 300c, so that would also make a good retraction limit. Brakes will often still be at 200c or so when we push back, and it isn't hard to put another 100c into them during the taxi out to the runway.

32 came in a bit hotter!!
 
I know that there are carefully controlled slots sold by airports do retake of and landing but is there control over who has access to flight paths. I do no mean whilst in the air but more from a scheduling perspective. I was at a sustainability presentation and as a side topic they talked about to fly from hamburg to Majorca twice in one day you needed to take off at 6AM andit started me thinking about who controls access the flight paths.
 

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