Search found 368 matches

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by thepinkmachine
Sat Mar 09, 2019 7:31 am
Forum: Technical/Operations
Topic: sterile cockpit - high altitude airports question
Replies: 24
Views: 3195

Re: sterile cockpit - high altitude airports question

In one of my previous airlines, if you were operating into high altitude airport, sterile cockpit was belo 18000’. For normal airports it was 10000. Then again, this was Asia, so they needed to have everything written down in their manuals. As others said the bottom line is not to get distracted dur...

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by thepinkmachine
Fri Mar 08, 2019 3:40 pm
Forum: Civil Aviation
Topic: Rumour: Boeing to increase 787-9 MTOW by 2.5 tonne
Replies: 123
Views: 26047

Re: Rumour: Boeing to increase 787-9 MTOW by 2.5 tonne

Update - had a look into FCOM data. 2.5T extra fuel close to the edge of range envelope yields slightly less than 200Nm extra range. Also this 2.5 extra could be used towards lifting higher payload, probably 15-20 more pax at longer ranges (taking into account extra burn from higher weight)

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by thepinkmachine
Fri Mar 08, 2019 12:55 pm
Forum: Civil Aviation
Topic: Rumour: Boeing to increase 787-9 MTOW by 2.5 tonne
Replies: 123
Views: 26047

Re: Rumour: Boeing to increase 787-9 MTOW by 2.5 tonne

At the edge of the 789’s range (like LAX-SIN) how much extra time/distance does 2.5t actually give you? The aircraft is carrying fuel to carry fuel after all. In practice the 2.5t would buy you rather less than 280nm, surely? My (somewhat educated) guess is 150-200Nm. It would also depend on the pa...

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by thepinkmachine
Tue Mar 05, 2019 12:47 pm
Forum: Civil Aviation
Topic: Rumour: Boeing to increase 787-9 MTOW by 2.5 tonne
Replies: 123
Views: 26047

Re: Boeing to increase 787-9 MTOW by 2.5 tonne

B764er wrote:
That's around 750 gallons more. Wonder how much further it will go on that.


200-300Nm. Not a tremendous change, but still adds a bit of range, and some extra flight time. Mind you, at extreme ranges, almost half of the extra 2.5 tons will be burned just to carry the added weight...

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by thepinkmachine
Mon Feb 25, 2019 7:08 am
Forum: Civil Aviation
Topic: China Airlines Pilot Sleeps On Duty
Replies: 76
Views: 10485

Re: China Airlines Pilot Sleeps On Duty

I can only confirm what others said above - once you start flying Longhaul you discover completely new levels of fatigue - and no, flying 4 sectors/day LCC style, while tiring, come nowhere near that. Fortunately, my employer allows controlled rest, and I don’t hesitate to use it. Previously, howeve...

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by thepinkmachine
Sat Feb 23, 2019 5:57 pm
Forum: Civil Aviation
Topic: a MTOW increase on 787-10 to compete with A359?
Replies: 605
Views: 86626

Re: a MTOW increase on 787-10 to compete with A359?

On top of that it can fly with complete los of hydraulic systems thanks to hydro/electro static actuators.


Just a side note, the 787 has the same feature - it has two pairs of electric spoilers and electrically driven stabilizer, which allows to maintain control in case of total hydraulic loss.

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by thepinkmachine
Fri Feb 15, 2019 3:44 pm
Forum: Civil Aviation
Topic: Airbus aims to reach breakeven on A350 this year
Replies: 29
Views: 4889

Re: So Airbus is losing money on every a350 sold??

I read it as in „they are not selling enough a/c to break even”, rather than “they are losing money on each airframe”

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by thepinkmachine
Wed Feb 06, 2019 12:20 am
Forum: Technical/Operations
Topic: Crew lodging...
Replies: 10
Views: 1882

Re: Crew lodging...

...Or perhaps the crew had landed late the day before and had to delay their report in the more, to have mandatory minimum rest at the hotel.

That’s actually more plausible than their delay due to snow on the highway.

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by thepinkmachine
Fri Jan 25, 2019 4:29 pm
Forum: Technical/Operations
Topic: AKL Alternates
Replies: 10
Views: 1913

Re: AKL Alternates

Don’t know what QR are using, but when I used to operate to AKL, we used CHC as our alternate. Alternates 400Nm away are not that unusual, especially in a wide body, which can’t operate into certain airports. I’ve seen alternates twice as far (GLA for KEF, BOM for DEL). As far as the cost of extra f...

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by thepinkmachine
Thu Jan 24, 2019 9:13 am
Forum: Civil Aviation
Topic: Air Tahiti Nui CEO Hints Nonstop Flights To Paris With 787-9
Replies: 77
Views: 15143

Re: Air Tahiti Nui CEO Hints Nonstop Flights To Paris With 787-9

Yes it would. With 25,000lb payload the 787-8 can fly 400nm further than the larger 787-9 according to the ACAPs. 9200nm versus 8800nm. The 788 burns less fuel, so in theory it has better range than the 789 - but it maxes out on MTOW too early. Technically, it could do the flight, but with 100-150 ...

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by thepinkmachine
Wed Jan 23, 2019 11:18 pm
Forum: Civil Aviation
Topic: Air Tahiti Nui CEO Hints Nonstop Flights To Paris With 787-9
Replies: 77
Views: 15143

Re: Air Tahiti Nui CEO Hints Nonstop Flights To Paris With 787-9

Had a quick look into the FCOM flight planning data and it *almost* works in still air and ~150-170PAX. Any significant headwind makes it a non-starter.

To make this flight operationally viable, the 789 would need ~5T extra fuel capacity (ACT anyone?) and a 5T MTOW boost...

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by thepinkmachine
Wed Jan 23, 2019 8:57 pm
Forum: Civil Aviation
Topic: Air Tahiti Nui CEO Hints Nonstop Flights To Paris With 787-9
Replies: 77
Views: 15143

Re: Air Tahiti Nui CEO Hints Nonstop Flights To Paris With 787-9

[list=][/list]

Samrnpage wrote:
Wouldnt the 787-8 be a better plane for the trip?


Not at current MTOW

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by thepinkmachine
Wed Jan 23, 2019 7:50 pm
Forum: Civil Aviation
Topic: Air Tahiti Nui CEO Hints Nonstop Flights To Paris With 787-9
Replies: 77
Views: 15143

Re: Air Tahiti Nui CEO Hints Nonstop Flights To Paris With 787-9

I think it would be doable with <200 pax. The problem is, even at max load, they would max out fuel capacity, which is 101T. LHR-PER is pretty much at max fuel. To fly 600Nm extra, they would need another 5-6T of fuel. Maybe Boeing is able to increase max fuel like Airbus did with A350ULR?

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by thepinkmachine
Mon Jan 21, 2019 8:57 pm
Forum: Technical/Operations
Topic: ALLISON 250’s shutdown procedure
Replies: 9
Views: 1549

Re: ALLISON 250’s shutdown procedure

Every turbine engine I have operated had a cool-down limitation, between 1 and 5 minutes of operation at idle. However, they vary from engine to engine, even of the same size. For instance CF-6 had 5 minutes (or 3, don’t remember now), while similar size RR T700 has only 1 minute. In any case, the p...

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by thepinkmachine
Sun Jan 06, 2019 10:35 am
Forum: Technical/Operations
Topic: Flight BF703 RUN-ORY
Replies: 4
Views: 1554

Re: Flight BF703 RUN-ORY

AFAIK, BF operate brand new A330 with 242T MTOW and center tank enabled, so it can take more fuel.

I have no data at the moment, but I’m pretty sure this variant could do this route with full house ie. 300+ PAX - especially that most likely they carry no cargo.

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by thepinkmachine
Sat Jan 05, 2019 4:20 pm
Forum: Technical/Operations
Topic: Question regarding missed approaches at SYD
Replies: 12
Views: 1448

Re: Question regarding missed approaches at SYD

As others said, it was probably not as much drama as it looks. Having said that, SYD ATC tend to push people into accepting the shorter 16L/34R as long as performance permits. On a windy day with one missed app behind me I would be more inclined to try 16R - it gives more leeway, plus perhaps the wi...

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by thepinkmachine
Fri Jan 04, 2019 4:21 pm
Forum: Technical/Operations
Topic: TOC/TOD determination before FMS
Replies: 23
Views: 1590

Re: TOC/TOD determination before FMS

The 787 glides very well, but it has very efficient speedbrakes, so once you extend them it turns into a brick... :) Also, it decelerates surprisingly well - no problem to lose speed, contrary to eg. A330. Also, it has autodrag function, which helps to decelerate on approach. All in all, you need to...

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by thepinkmachine
Fri Jan 04, 2019 11:31 am
Forum: Technical/Operations
Topic: TOC/TOD determination before FMS
Replies: 23
Views: 1590

Re: TOC/TOD determination before FMS

They can. However in an unpressurized a/c you also need to account for cabin descent rate for pax comfort - depending who you carry of course. In my GA time I was just aiming form 500ft/min descent based on time to destination. Eg. When flying at 10000 ft, i’d Start the descent 20 minutes before lan...

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by thepinkmachine
Thu Jan 03, 2019 4:10 pm
Forum: Technical/Operations
Topic: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina
Replies: 29
Views: 3619

Re: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina

Their are multiple advisory notes regarding the opening of the cargo doors after a landing due to a possible fire. Make sure you have the trucks standing by and ready for action. Yup. This, plus you also want to have the passengers off the plane before you open the door. Still, you can’t tell if th...

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by thepinkmachine
Thu Jan 03, 2019 3:11 pm
Forum: Technical/Operations
Topic: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina
Replies: 29
Views: 3619

Re: ETOPS/safety rating for flights between AU/NZ and Chile/Argentina

While fire suppression is one relevant standard, for a lot of people, pax especially, potentially flying for 5 hours on one engine is a bit difficult to accept. GF Then again- I’d rather be flying on one engine for 5 hours then with a fire in my cargo hold. The funny thing is, that the smoke detect...

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by thepinkmachine
Wed Jan 02, 2019 10:42 pm
Forum: Technical/Operations
Topic: TOC/TOD determination before FMS
Replies: 23
Views: 1590

Re: TOC/TOD determination before FMS

GF’s Works pretty well till today - actually with a bit of practice the mental calculations done this way may be more accurate than whatever VNAV comes up with...

Just on the newest jets it’s altitude x4 instead of 3 - they tend to glide like crazy... :)

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by thepinkmachine
Wed Jan 02, 2019 6:11 pm
Forum: Civil Aviation
Topic: LOT News Thread - 2019
Replies: 681
Views: 89492

Re: LOT News Thread - 2019

Blerg wrote:

Do you know what equipment they used? IL-62?


For sure the 767 in the 90’s, maybe the IL62 as well before the 76 came

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by thepinkmachine
Wed Jan 02, 2019 7:05 am
Forum: Civil Aviation
Topic: How is the A350 performing for DL
Replies: 261
Views: 55420

Re: How is the A350 performing for DL

The galleys on the 350 are a joke - they are really cramped compared to other wide bodies. IIRC they are part of Airbus’s SpaceFlex concept, which is supposed to save space in the cabin. This time, however they went too far imho... I wholeheartedly understand the frustration of ‘senior mamas’, as th...

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by thepinkmachine
Mon Dec 31, 2018 9:47 pm
Forum: Civil Aviation
Topic: How is the A350 performing for DL
Replies: 261
Views: 55420

Re: How is the A350 performing for DL

Perhaps the issue is that the 268T variant is not doing what it was expected/guaranteed to do? ie. it doesn’t carry the payload it was supposed to on paper at 268T. Increasing MTOW is a solution, but it costs money in OEM fees, but also nav/landing charges etc. Heard similar rumors from some sources...

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by thepinkmachine
Mon Dec 31, 2018 1:27 pm
Forum: Civil Aviation
Topic: How is the A350 performing for DL
Replies: 261
Views: 55420

Re: How is the A350 performing for DL

HIA350 wrote:
yes they are scrapping them, sell them to coke and pepsi to become soda cans



That would be the world’s first carbon-fiber soda cans :D

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by thepinkmachine
Sun Dec 30, 2018 5:26 pm
Forum: Technical/Operations
Topic: Boeing 777 Wiper limit speed
Replies: 39
Views: 4688

Re: Boeing 777 Wiper limit speed

Well, they do help, especially in tropical wx. I’ve wondered the same - all the Airbuses have a hard limit for wiper speed, but apparently there’s no published limit on the Boeing.

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by thepinkmachine
Sun Dec 30, 2018 5:22 pm
Forum: Technical/Operations
Topic: 787 Improvements
Replies: 74
Views: 16248

Re: NZ CEO hints longer range 787

To me, one obvious candidate for range extension is the 788. It already has the same wing as the 789, already has the same fuel capacity as the 789. It is lighter than the 789 and burns less fuel.

If Boeing gave it the same MTOW as the 789 it would be a real long range monster!

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by thepinkmachine
Thu Dec 27, 2018 8:58 am
Forum: Technical/Operations
Topic: Interaction between weight, thrust, altitude and speed
Replies: 5
Views: 838

Re: Interaction between weight, thrust, altitude and speed

You pretty much have answered your own questions :) As the plane gets lighter you need less thrust to continue flying at constant speed and/or fly higher speed by maintaining constant thrust. Having said that, - the lighter the plane gets, the more efficient it is to fly at higher altitudes, so on l...

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by thepinkmachine
Wed Dec 26, 2018 6:50 pm
Forum: Technical/Operations
Topic: Non-political flight plan deviations from shortest/fastest route
Replies: 6
Views: 1878

Re: Non-political flight plan deviations from shortest/fastest route

How large can these be? The example I gave seems overblown but curious about the magnitude of such deviations. Normally on order of 2-3%, maybe 5. Especially on long haul routes, the magnitude is low. On the other side of spectrum are short haul routes in certain parts of the world (eg. India, Chin...

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by thepinkmachine
Wed Dec 26, 2018 8:31 am
Forum: Technical/Operations
Topic: Non-political flight plan deviations from shortest/fastest route
Replies: 6
Views: 1878

Re: Non-political flight plan deviations from shortest/fastest route

As far as I can see, your example is errorneous. I believe the problem might be that the flight goes near the pole and that somehow affects Flightaware’s calculations. If you look at the routing on the map it makes no sense at all... After all, it’s just a website, not a professional flight planning...

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by thepinkmachine
Mon Dec 24, 2018 2:27 pm
Forum: Technical/Operations
Topic: Derating engines and SFC
Replies: 31
Views: 2341

Re: Derating engines and SFC

The most direct effect of derate on TSFC is increased engine life. As an engine degrades, its fuel burn for a set thrust level increases. Increased engine life means that the engine degrades at a lower rate and better fuel flow is retained for a longer time. That’s in the long term. How about reduc...

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by thepinkmachine
Mon Dec 24, 2018 2:26 pm
Forum: Technical/Operations
Topic: Derating engines and SFC
Replies: 31
Views: 2341

Re: Derating engines and SFC

The most direct effect of derate on TSFC is increased engine life. As an engine degrades, its fuel burn for a set thrust level increases. Increased engine life means that the engine degrades at a lower rate and better fuel flow is retained for a longer time. That’s in the long term. How about reduc...

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by thepinkmachine
Mon Dec 24, 2018 12:32 pm
Forum: Technical/Operations
Topic: Derating engines and SFC
Replies: 31
Views: 2341

Re: Derating engines and SFC

I’m no engine specialist, but I’m 100% sure that all derated/reduced thrust ops result in increased fuel burn - I guess due to lower engine efficiency, or due to the fact that the airplane climbs longer and stays longer at lower levels. All in all, the work done is the same, but one way or another, ...

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by thepinkmachine
Mon Dec 24, 2018 11:47 am
Forum: Technical/Operations
Topic: Derating engines and SFC
Replies: 31
Views: 2341

Re: Derating engines and SFC

What Derate does is reduce takeoff and/or climb thrust to save engine life. It does not affect cruise thrust (see “derate washout”), so cruise TSFC is the same.

However, Derated thrust increases fuel burn during takeoff/climb, so one can argue that the TSFC during these phases is somewhat reduced.

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by thepinkmachine
Sun Dec 23, 2018 6:30 pm
Forum: Civil Aviation
Topic: LOT news thread - 2018
Replies: 258
Views: 36196

Re: LOT news thread - 2018

AFAIK only E190 is LCY certified...

Also, the Q400... ;)

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by thepinkmachine
Wed Dec 12, 2018 9:58 pm
Forum: Technical/Operations
Topic: BA bird strike at Male, divert question
Replies: 5
Views: 2211

Re: BA bird strike at Male, divert question

Depends on several factors, like the crew composition (2, 3 or 4 pilots), total duty time etc. However, for a simple fuel stop (i.e. gas up and go) I’d expect them to be able to continue without a crew change...

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by thepinkmachine
Mon Dec 10, 2018 9:42 am
Forum: Technical/Operations
Topic: Reverse thrust practice
Replies: 19
Views: 3843

Re: Reverse thrust practice

Carbon brakes do wear per application, but brake energy is not entirely irrelevant. Once you hear them up past ~450-500 degrees C, brake oxidation starts and wear increases substantially. Depending on the plane type, mass and possibly tailwind, it may be quite easy to get into oxidation region. Ther...

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by thepinkmachine
Sun Dec 09, 2018 12:12 pm
Forum: Technical/Operations
Topic: Manual flight handling characteristics of airliners
Replies: 74
Views: 9400

Re: Manual flight handling characteristics of airliners

What I can add is that most airliners’ flight controls are quite sensitive and powerful compared a C172. You fly them with much smaller inputs than on GA aircraft. Also, higher speeds means little pitch changes result in large VS changes, so manual handling has to be more precise. Changes in pitch a...

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by thepinkmachine
Fri Nov 09, 2018 7:07 pm
Forum: Technical/Operations
Topic: Taxi out on one engine?
Replies: 65
Views: 6633

Re: Taxi out on one engine?

On a 787 it would be a no brainier really. During training I was told by Boeing instructors that Boeing didn't recommend it - unlike the 'Bus, which has appropriate SE taxi procedures published in the FCOM. I stand to be corrected, though. If there's any official Boeing guidance on this, I would lo...

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by thepinkmachine
Fri Nov 09, 2018 5:03 pm
Forum: Technical/Operations
Topic: Taxi out on one engine?
Replies: 65
Views: 6633

Re: Taxi out on one engine?

Single taxi out worked like a treat on the ATR, however, it gets more complicated as the size of the airplanes increases. Did it a couple of times on the A330, but scared myself in the process. To get the thing moving, I needed a handful of thrust and those big engines can make a lot of jet blast, a...

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by thepinkmachine
Fri Nov 09, 2018 2:23 pm
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 457
Views: 94412

Re: 787 vs A350 range

In reading this thread I have to ask.. Is any of this relevant as to what airplane the Airline should or could buy? Because none of you would be in on the FIX as to What any airline would purchase. If you read carefully the title of thread, you will find that it says “787 vs A350 range”, rather tha...

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by thepinkmachine
Thu Nov 08, 2018 4:23 pm
Forum: Technical/Operations
Topic: Taxi out on one engine?
Replies: 65
Views: 6633

Re: Taxi out on one engine?

Happened to me as well… When I was a brand new F/O on the ATR, one idiot captain decided to cut both engines when entering the parking stand with the intent of coasting into the final parking position. It went pear-shaped when he tried to stop the plane and discovered the brakes were not working... ...

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by thepinkmachine
Thu Nov 08, 2018 1:00 pm
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 457
Views: 94412

Re: 787 vs A350 range

What kind of contingency fuel do you usually get in kg or in terms of flight time on LH flights? Just trying to get an idea of how much can be saved compared to traditional 3-5% method... Well with PBC (probability based contingency) you need to take the good with the bad, generally I will arrive w...

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by thepinkmachine
Thu Nov 08, 2018 12:01 pm
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 457
Views: 94412

Re: 787 vs A350 range

We keep a track of every flight by city pair, type, and flight number. Also the actual fuel burn vs flight plan, taxi out time, holding time, extra burn vs flight plan, track flown, contingency left on arrival, departure/arrival times for every flight number by type. That means if we have a city pa...

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by thepinkmachine
Thu Nov 08, 2018 10:45 am
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 457
Views: 94412

Re: 787 vs A350 range

There is No ESAD on the plan, but the Contingency fuel is 1.2. It’s 10% up to a maximum of 1.2, but that is considered to be burnt in the Min fuel required over destination. The actual Min required fuel is 95.1, but the “build up” to get them there with 70 minutes is 95.8. Final reserve is 1.9, wit...

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by thepinkmachine
Wed Nov 07, 2018 4:08 pm
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 457
Views: 94412

Re: 787 vs A350 range

For discussion. Tonight’s QF9 has a flight time of 16:54 with a flight fuel burn of exactly 91.0. Take off weight is 249.3/ 254.0, and it arrives with 4.5T of fuel. Carrying 210 POB so 26 empty seats all of which are in economy. Incidentally that arrival fuel gives the QF9 and Endurance over the de...

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by thepinkmachine
Wed Nov 07, 2018 12:14 pm
Forum: Technical/Operations
Topic: Taxi out on one engine?
Replies: 65
Views: 6633

Re: Taxi out on one engine?

Did it on the ATR, A320 and eve A330. Having said that, single engine taxi out is not very common and many airlines don't authorize it, as there can be several problems. Single engine taxi in is much more common....

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by thepinkmachine
Tue Nov 06, 2018 9:45 am
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 457
Views: 94412

Re: 787 vs A350 range

Zeke, small correction regarding QF9. According to my calculations, the Trip Fuel for this flight should be around ~95 tonnes, So average fuel flow would be around 5588 kg/hr. 100.6 tonnes quoted earlier is most likely the Block Fuel and that’s approximately a tonne short of the maximum tank capacit...

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by thepinkmachine
Sat Nov 03, 2018 9:35 pm
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 457
Views: 94412

Re: 787 vs A350 range

A380 and 777 will probably have significantly different values of reserve fuel. So will A320 and 737. However, A332, A333, A359, 788 and 789 all are airplanes of similar size and will have similar amount of fuel remaining after landing. A ton, or two, of difference will have negligible effect on fue...

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by thepinkmachine
Sat Nov 03, 2018 1:03 pm
Forum: Technical/Operations
Topic: 787 vs A350 range
Replies: 457
Views: 94412

Re: 787 vs A350 range

@RJMAZ, Reserve fuel is only used to obtain the landing weight, which in turn is required to get the fuel burn values. The resulant fuel figures are only trip fuel figures, ie. fuel burnt from takeoff to landing. If it makes you happy, we can assume eg. 6T of reserve fuel for the 788, but it will on...

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