Search found 593 matches

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by gloom
Sat Jan 22, 2022 7:54 pm
Forum: Civil Aviation
Topic: Qatar and Airbus Legal Dispute Continues - Airbus Revokes A321 Order
Replies: 437
Views: 56608

Re: Qatar and Airbus Legal Dispute Continues - Airbus Revokes A321 Order

May I ask to clarify, are you speculating it may have looked different or are you really sure that it looked quite different on day +1? Pure speculation, to be sure someone would need to see it on day 1. However, since the (first) planes are grounded for quite a long time, I'd say probability it is...

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by gloom
Sat Jan 22, 2022 7:16 am
Forum: Civil Aviation
Topic: Qatar and Airbus Legal Dispute Continues - Airbus Revokes A321 Order
Replies: 437
Views: 56608

Re: Qatar and Airbus Legal Dispute Continues - Airbus Revokes A321 Order

Just a quick reminder, anyone noticed we're quite a long time from the drama start? If I'd just go down to my car, make a scratch here and there (barely visible), then put it out and let it there for a few months, do you think it would picture a real damage on say November 2022? And if I had a plan ...

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by gloom
Sun Jan 16, 2022 9:34 pm
Forum: Civil Aviation
Topic: Boeing confirms higher gross weight 787-10
Replies: 401
Views: 61746

Re: Boeing confirms higher gross weight 787-10

With the update apparently, the landing gear can be strengthened no issue. Pavement loading will still be lower than a 300ER I'm Guessing as they said no structural changes that they found the gear could carry the extra weight. I'm betting that it could easily carry the added weight for T-O and as ...

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by gloom
Sun Jan 16, 2022 7:44 am
Forum: Civil Aviation
Topic: Boeing confirms higher gross weight 787-10
Replies: 401
Views: 61746

Re: Boeing confirms higher gross weight 787-10

I thought the gear was the weight limit? Specifically the pavement loading. Exactly this. Wiki has a list, which looks more-or-less reliable. https://www.youtube.com/watch?v=VEuYn9_e1Ac In terms of PCR, 787-9 (and J, as weights/dimensions are more or less same - with J probably just a bit heavier i...

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by gloom
Fri Jan 14, 2022 7:29 am
Forum: Technical/Operations
Topic: CRJ-200 Climb Performance
Replies: 25
Views: 2146

Re: CRJ-200 Climb Performance

The E45 cruises faster than the CR2. We were behind a Skywest 175 today, and ATC asked their speed, M0.62... then asked our speed, M0.80 ATC then asked Skywest how fast they could go... M0.72, and issued maintain M0.72 or greater and we were given M.70 or slower, which we were unable to do unless w...

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by gloom
Thu Jan 06, 2022 9:18 am
Forum: Civil Aviation
Topic: Airbus A350XWB ongoing evolutionary enhancements, EIS 2025-2030.
Replies: 106
Views: 22026

Re: Airbus A350XWB ongoing evolutionary enhancements, EIS 2025-2030.

Can anyone take a stab at what the new MTOW does for payload at max fuel? 3 tons more ;) Yeah, I know you probably ask for estimated payload at max fuel. MTOW is 283t, assuming 135-136t as consensus for "ready to go" empty weight, and 110t for fuel (it's actually 110.5, but a rough estima...

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by gloom
Wed Jan 05, 2022 10:27 pm
Forum: Civil Aviation
Topic: Airbus A350 Production/Delivery Thread - 2022
Replies: 59
Views: 17073

Re: Airbus A350 Production/Delivery Thread - 2022

I also noticed the gap, but it looks the WVs are not necessarily sequential based on when they are added to the TCDS. Quite right. I would make a guess WVs are allocated based on day when WV works started. Some take more time to make it into TCDS, some less, and that would probably explain the time...

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by gloom
Wed Jan 05, 2022 8:20 pm
Forum: Civil Aviation
Topic: Airbus A350XWB ongoing evolutionary enhancements, EIS 2025-2030.
Replies: 106
Views: 22026

Re: Airbus A350XWB ongoing evolutionary enhancements, EIS 2025-2030.

I could see this helping Delta with their JNB-ATL headaches. How? Out of JNB, A350 is limited by hot&high conditions, and resulting TOW, not by hitting MTOW. The 280t birds included wing twist and some other minor improvements that helped JNB case (for example, lower fuel burn allows higher pay...

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by gloom
Wed Jan 05, 2022 7:59 pm
Forum: Civil Aviation
Topic: Airbus A350 Production/Delivery Thread - 2022
Replies: 59
Views: 17073

Re: Airbus A350 Production/Delivery Thread - 2022

Variant: 020 Mod Number 115156 MTOW: 283 t MLW: 207 t MZFW: 195,7 t There's something more to see from Airbus, I think. Anyone noticed the numbering from VW000 till VW020 went increasing by one? And now, we have VW023 variant, but no 021 and 022. Actually, in TCDS there are two blanks. Two more wei...

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by gloom
Thu Dec 16, 2021 10:19 pm
Forum: Technical/Operations
Topic: Long delayed departure LHR-NAS
Replies: 9
Views: 1839

Re: Long delayed departure LHR-NAS

There is a couple of things that could go really wrong and make up for such a long wait time. First original reason, which usually would be technical. You need to diagnose, check the exact element, and hope it would be fixed just by simple replace of element. It's not the case sometimes. It's quite ...

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by gloom
Tue Dec 14, 2021 8:05 pm
Forum: Civil Aviation
Topic: Updated: Airbus goes legal as Qatar Airways jet row escalates
Replies: 1232
Views: 210118

Re: Updated: Airbus goes legal as Qatar Airways jet row escalates

So, if anything, AAB is not backing down, he's escalating... ... yet still staying committed to upcoming A350-1000 and A321neo orders while also closing the door on ordering A350F. Isn't that famous carrot-stick tactics? It's all your fault, if you agree, we will consider 350F though. I have more a...

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by gloom
Sat Dec 11, 2021 3:21 pm
Forum: Civil Aviation
Topic: Updated: Airbus goes legal as Qatar Airways jet row escalates
Replies: 1232
Views: 210118

Re: Updated: Airbus goes legal as Qatar Airways jet row escalates

Qatar clearly wants a one and done type fix. I think it's fair to say Airbus wants it as well. There are still two differences: 1. what's done (we have no idea how long is "temporary", how long is "done", as I believe it is an area where maintetance is done every now and then, a...

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by gloom
Sat Dec 11, 2021 7:53 am
Forum: Technical/Operations
Topic: SOU approach pattern.
Replies: 21
Views: 1784

Re: SOU approach pattern.

I guess one comment fits here. IATA code is usually passenger-oriented. Great for use within sales system, terminal services, stuff like that. Travel stats, etc will use IATA code naturally. ICAO is more airport oriented. It's not about passengers and terminals, but more about airplane services and ...

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by gloom
Sun Nov 28, 2021 8:20 am
Forum: Civil Aviation
Topic: Updated: Reuters: Airbus launches A350 freighter
Replies: 1858
Views: 322701

Re: Updated: Reuters: Airbus launches A350 freighter

The problem with upping the MTOW on the 777XF ... It would most certainly be able to carry the same 109 tons the same distance as an A350F but, and here’s the crux, weighing 50 tons more and burning 5-10% more fuel to get the job done. Not a winning proposition. Correct, but there's another itch th...

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by gloom
Sat Nov 27, 2021 9:16 pm
Forum: Technical/Operations
Topic: 787 Cruise Mach at Cost Index 300
Replies: 10
Views: 1992

Re: 787 Cruise Mach at Cost Index 300

I don’t know any airline that flies around at a seated Mach number in a modern aircraft unless it’s an ATC speed constraint. Everyone I talk to fly ECON speeds which are a function of CI, weight, altitude, and environmental conditions. I know LH was using fixed Ma at least a few years ago on their ...

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by gloom
Sat Nov 27, 2021 9:03 am
Forum: Technical/Operations
Topic: 787 Cruise Mach at Cost Index 300
Replies: 10
Views: 1992

Re: 787 Cruise Mach at Cost Index 300

So how fast is this airplane going at CI300 vs. say CI50? CI is not about speed, it's all about cost (fuel consumption) as the name says. Depending on wind (tail/head, speed), it will be different. Typically, 300 is asking for high speed standard cruise (.86, as you say), low CI (say 30s) will give...

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by gloom
Sun Nov 21, 2021 7:51 am
Forum: Civil Aviation
Topic: Airbus A350 Production/Delivery Thread - 2021
Replies: 526
Views: 214996

Re: Airbus A350 Production/Delivery Thread - 2021

Question. First 280T was MSN #216, are all -900’s manufactured after also 280T. Thanks. One remark first - A350 line was already running full speed at that time, so depending on MSN/completion date, there could be a number completed after, and not 280T. Having said that, any A350 after MSN 219 is a...

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by gloom
Mon Nov 15, 2021 7:29 pm
Forum: Civil Aviation
Topic: Tim Clark hinting at a possible Emirates order review?
Replies: 83
Views: 16674

Re: Tim Clark hinting at a possible Emirates order review?

He can't move ahead of others in the Airbus queue and start replacing those with A351s in any appreciable number before then can he? Talking about appreciable numbers, A350 line is running now at what, 7/month I believe. What will be the start of 777X? Airbus managed to get just over 10 350s first ...

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by gloom
Fri Nov 12, 2021 7:30 am
Forum: Civil Aviation
Topic: Updated: Airbus goes legal as Qatar Airways jet row escalates
Replies: 1232
Views: 210118

Re: Qatar Airways has grounded 13 A350’s at the request of the Qatar Aviation regulator

I suspect that even the paint was not expected to fail in 4.3 years in normal service. Sure thing. Yet, it's not like normal conditions. There are some early frames, that could've been investigated outside of Qatar. OH-LWA still flying, right? And it's older than at least few of the grounded Qatar ...

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by gloom
Tue Nov 09, 2021 8:09 pm
Forum: Technical/Operations
Topic: Going higher
Replies: 3
Views: 1063

Going higher

Hello, I've only just got a link for an interesting data stats on Eurocontrol website: https://www.eurocontrol.int/publication/eurocontrol-data-snapshot-21-aircraft-flying-higher-more-efficiently-and-sustainably Hope you will all enjoy. STill, there's more to come, isn't there? With data at hand, an...

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by gloom
Sun Oct 10, 2021 2:05 pm
Forum: Technical/Operations
Topic: Could flap operation be automated?
Replies: 18
Views: 1906

Re: Could flap operation be automated?

I was wondering about this since flap movement is tied to variables like weight and speed. Could flight deck automation remove from pilots the task of lowering and raising flaps based on aircraft configuration? Yes, it is possible. No, it is not welcome. And not for a "human don't like automat...

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by gloom
Fri Oct 08, 2021 6:49 pm
Forum: Technical/Operations
Topic: EGLL SID Altitude Constraints
Replies: 7
Views: 943

Re: EGLL SID Altitude Constraints

Do these constraints exist in real-world ops and pilots adhere to them? Yes, they are. Check side-by-side SIDs and STARs, or see the traffic on FR24. Arriving traffic is limited to 7000, while departures are 6000 limited. As these cross, and once those crossing points are cleared, you're allowed to...

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by gloom
Wed Oct 06, 2021 8:40 pm
Forum: Technical/Operations
Topic: Circling to Land in an Airliner. JAC
Replies: 16
Views: 1927

Re: Circling to Land in an Airliner. JAC

If you don’t have visual conditions you can’t circle. Exactly this. I was also taught, that at any time during circling you loose visual to runway, you break off the approach and go around. This is - as mentioned since the start - low, fast, and prone to mistakes. It's perfectly safe, but probably ...

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by gloom
Mon Oct 04, 2021 8:18 pm
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4158

Re: 747-8 engine choice

bigb wrote:
I guess I was looking for optimal cruise not max being tucked in the coffin corner.


Increasing cruise also increases max weight a bit (check .80 vs .82 cruise differences).

Still, it's only 242t bird that cannot reach 330 as optimum. 233t birds are off to 330 with no problem at all.

Cheers,
Adam

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by gloom
Mon Oct 04, 2021 6:52 pm
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4158

Re: 747-8 engine choice

I find it hard that a A330 at Max Gross will make FL330 initially I could be wrong though. Usually FL310 is what I normally get on a max gross 747 doing a transpac with stepping up to FL330 after a few hours in flight. Depends on weight config - we know this concept of flex MTOW. However, there is ...

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by gloom
Sun Oct 03, 2021 8:52 pm
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4158

Re: 747-8 engine choice

kitplane01 wrote:
What I don't know is if B747s cruise at or very near their Mach limit. How much lower than Mmo is a B747s cruise speed?


Typical cruise: 0.85 (some airlines will fly a bit faster, accepting increased a tad fuel burn, up to 0.86).
Mmo: 0.9

Cheers,
Adam

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by gloom
Sun Oct 03, 2021 7:54 am
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4158

Re: 747-8 engine choice

If you go too high, you will not have enough engine thrust to maintain the optimum indicated air speed and so you have to increase your AoA above the optimum value. But with larger engines you could maintain this optimum air speed higher up. With larger engines you can maintain the optimum IAS and ...

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by gloom
Sun Oct 03, 2021 6:26 am
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4158

Re: 747-8 engine choice

You wrote "optimum altitude" and not "maximum altitude" but for recent technology jetliners flying to maximum range, that's just about the same thing because the thinner air lets you go faster for the same thrust. No, not really. Optimum altitude is an altitude where a given fra...

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by gloom
Sat Oct 02, 2021 8:10 pm
Forum: Technical/Operations
Topic: In a circling approach, how much of a straight path is required before landing.
Replies: 20
Views: 1598

Re: In a circling approach, how much of a straight path is required before landing.

Just to clarify not to confuse the terms. While a visual approach is not a standard instrument approach procedure it is conducted by an aircraft on an instrument flight plan. I believe your reference to "VFR" is not referring to a VFR flight plan, but an aircraft operating on an instrumen...

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by gloom
Sat Oct 02, 2021 5:42 pm
Forum: Technical/Operations
Topic: In a circling approach, how much of a straight path is required before landing.
Replies: 20
Views: 1598

Re: In a circling approach, how much of a straight path is required before landing.

yes we (ATC) can assign a visual approach as well as the pilot can request it as well, but the pilot has to report the airport in sight and/or the preceded aircraft if they will be following one closely. A bit different at my country. You cannot directly offer VFR as ATC, as it's pilots to ask and ...

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by gloom
Sat Oct 02, 2021 5:33 pm
Forum: Civil Aviation
Topic: Ethiopian 777X or A350-1000 Deal Nears
Replies: 53
Views: 12133

Re: Ethiopian 777X or A350-1000 Deal Nears

It’s about the same. I don’t know if the higher thrust engines of the GE9X add to the hot and high discussion Not at all, given thrust/weight ratio is more or less the same (more thrust compensates weight difference). I'd say slight edge for A-bus here, since it has a ready-to-go product with sligh...

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by gloom
Sat Oct 02, 2021 6:53 am
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4158

Re: 747-8 engine choice

If you're saying a 747 with a bigger wing would likely have a higher maximum altitude (and lower top speed) I'll agree. But it is still the case that a 747 with more thrust could climb higher. Both right (assuming by speed you mean lower IAS, but Ma/TAS staying more or less same). But once you have...

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by gloom
Fri Oct 01, 2021 6:27 am
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4158

Re: 747-8 engine choice

I've never read wing-load-limited in any aerodynamic textbook, and I don't think they do the math in those terms. They don't. It's the construct to give a hint . But since you want some... Two important moments in flight that affect cruise level: 1. Capability to do final climb is (or could be) bot...

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by gloom
Thu Sep 30, 2021 7:32 pm
Forum: Technical/Operations
Topic: 747-8 engine choice
Replies: 46
Views: 4158

Re: 747-8 engine choice

For less development cost the 747-8 could have used a bleed-air version of the normal GE-nx, with more thrust (74,100 vs 65,000). This would have added 1308 lbs of extra engine weight, plus some pylon reinforcement. [...] Would this have allowed the 747-8 to fly higher, and therefore save fuel? Not...

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by gloom
Fri Sep 24, 2021 6:19 am
Forum: Technical/Operations
Topic: A couple of battery electric aircraft questions. 1 noise, and 1 cost.
Replies: 7
Views: 1040

Re: A couple of battery electric aircraft questions. 1 noise, and 1 cost.

As for costs, itll be substantially cheaper to operate than fuel-powered planes, Not quite sure about it. Yes, the energy cost per flight would probably be cheaper. I fully expect MX to be cheaper, as both electric engines and batteries are less complicated and easier to replace/upgrade. However, t...

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by gloom
Sat Sep 11, 2021 6:22 am
Forum: Technical/Operations
Topic: Does the A220 have a PTU?
Replies: 2
Views: 1168

Re: Does the A220 have a PTU?

https://wwwapps2.tc.gc.ca/saf-sec-sur/2 ... BD_500.pdf

Cheers,
Adam
-->

Yes, it does.

Little goodie found during googling:
https://wwwapps2.tc.gc.ca/saf-sec-sur/2 ... BD_500.pdf

Cheers,
Adam

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by gloom
Fri Sep 10, 2021 2:54 pm
Forum: Technical/Operations
Topic: How did they decide where to put the VOR stations?
Replies: 30
Views: 3189

Re: How did they decide where to put the VOR stations?

There were plenty of single NDB approaches, no requirement for two beacons, but you’re correct in that two beacons, one near the airport could reduce the minimums. Lots eastern bloc countries used them, see Dubrovnik and USAF crash. In North America, we never saw two NDBs on approaches, just went t...

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by gloom
Fri Sep 10, 2021 5:29 am
Forum: Technical/Operations
Topic: How did they decide where to put the VOR stations?
Replies: 30
Views: 3189

Re: How did they decide where to put the VOR stations?

Back in the days, there were navigating beacons called NDB (Non Directional Beacons). They were the first radio approach devices, ADF was used for approach. But since they were non directional, you've had to have two for an approach to be accurate enough, more expensive to maintain etc. Then, the VO...

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by gloom
Fri Aug 27, 2021 5:53 am
Forum: Technical/Operations
Topic: CFM56 versus GTF
Replies: 3
Views: 1169

Re: CFM56 versus GTF

It's always a bad thing to consider engine's reliability based on own prejudices. Remember T1000 problems on 787? And, at the same time, TXWB doing records on IFSDs? How can a bad engine and a good engine be done next to each other? Yes, there were some teething issues on GTF. Still, PW took it's le...

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by gloom
Fri Aug 27, 2021 5:48 am
Forum: Technical/Operations
Topic: Can you expand on this quote on speed stability in the CV-880M to help me understand it better?
Replies: 11
Views: 1867

Re: Can you expand on this quote on speed stability in the CV-880M to help me understand it better?

I don't immediately see how the MAX issues were positive speed stability issue. Reread, he never said MAX was not positive speed stability. He said it showed how much not having such stability could be bad thing. And sure, MAX is positive speed, but issues with human-machine interface made its pitc...

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by gloom
Sun Aug 08, 2021 6:18 pm
Forum: Technical/Operations
Topic: long distance at low altitude
Replies: 14
Views: 2301

Re: long distance at low altitude

The FAA allows flight crews to fly up to 12499' in unpressurized aircraft without supplemental oxygen, Sec. 135.89 Pilot requirements: Use of Oxygen. (a) Unpressurized aircraft. Each pilot of an unpressurized aircraft shall use oxygen continuously when flying— (1) At altitudes above 10,000 feet thr...

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by gloom
Sun Aug 08, 2021 4:45 pm
Forum: Technical/Operations
Topic: long distance at low altitude
Replies: 14
Views: 2301

Re: long distance at low altitude

10,000 feet is not the assumed maximum safe altitude for non-pressurized aircraft. Depends on context. On unpressurized aircraft, usually above 10.000 ft pilot needs to use oxygen, at least according to FAA (and I think it's also a consensus across the world). https://www.faa.gov/pilots/safety/pilo...

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by gloom
Sun Aug 08, 2021 6:42 am
Forum: Technical/Operations
Topic: long distance at low altitude
Replies: 14
Views: 2301

Re: long distance at low altitude

About less than an hour ago I saw an plane flying at "relative low" altitude flying over Braunschweig Germany. According to flightradar24 it is a 777 VP-BJP from airline Nordwind flying from Paris to Moscow with 320kt at 9000ft. What the heck are they doing? What might be the reason for s...

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by gloom
Wed Aug 04, 2021 7:07 pm
Forum: Technical/Operations
Topic: Maximum gross weight step climb question
Replies: 20
Views: 2097

Re: Maximum gross weight step climb question

A heavy 787 will start at approximately FL330, not sure about the A350. 430 will only be reached by a fairly light 788 Right, my airline started with 788 and usually 380 as initial. Forgot it's not the case for 789/78J. 359 at MTOW goes straight to 370, IIRC. 430 is quite reachable - on HKG-HEL leg...

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by gloom
Wed Aug 04, 2021 6:11 am
Forum: Technical/Operations
Topic: Maximum gross weight step climb question
Replies: 20
Views: 2097

Re: Maximum gross weight step climb question

I am not sure if the same pronounced effect exists with newer generation 787's or A 350's. It does in terms of general step climb procedure. However, both 787 and A350 will start higher (approx 36,37 at MTOW) and will climb higher a bit quicker. In many cases up to F430, depending on ZFW. Cheers, A...

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by gloom
Mon Aug 02, 2021 8:16 pm
Forum: Civil Aviation
Topic: DL drops Cape Town from JNB-ATL schedule
Replies: 246
Views: 53318

Re: DL drops Cape Town from JNB-ATL schedule

codc10 wrote:
DAL is working to preferentially schedule its 3 (currently) higher gross weight 359s on the route.


No need to, in most cases. Usually due to high and hot, A359s are TOW limited, but below 275t. Subject to specific day condition, but most calculations were just above 270t TOW limit.

Cheers,
Adam

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by gloom
Mon Jun 21, 2021 7:35 pm
Forum: Civil Aviation
Topic: DL drops Cape Town from JNB-ATL schedule
Replies: 246
Views: 53318

Re: DL drops Cape Town from JNB-ATL schedule

It doesn’t matter what Vr is only GS matters. While I respect you reading from a book I have operational knowledge as a retired 787 Captain. Typical density altitude, temperature corrected for CPT would be around 7500ft for typical conditions when Delta departs (ISA+15, 5700ft pressure altitude). T...

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by gloom
Sun Jun 20, 2021 8:37 pm
Forum: Civil Aviation
Topic: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS
Replies: 254
Views: 23811

Re: CX Working With Airbus on Single-Pilot System for A350 With 2025 EIS

Two is the absolute minimum. Two engines, at least two systems of everything like hydraulics and generators. One pilot is not enough for an airliner. At least two are needed and often more than two are on duty for safety reasons. Not really. There used to be four engines, then three systems (in cas...

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by gloom
Sun Jun 20, 2021 7:27 pm
Forum: Civil Aviation
Topic: DL drops Cape Town from JNB-ATL schedule
Replies: 246
Views: 53318

Re: DL drops Cape Town from JNB-ATL schedule

Not saying you are wrong but I have to ask are you using Ground speed? Not really. It's all there on ACAPS. You can easily see where it reaches tire speed since from that moment longer runway does not increase TOW. The plane becomes tire speed limited. https://www.airbus.com/content/dam/corporate-t...

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by gloom
Sun Jun 20, 2021 6:33 pm
Forum: Civil Aviation
Topic: DL drops Cape Town from JNB-ATL schedule
Replies: 246
Views: 53318

Re: DL drops Cape Town from JNB-ATL schedule

On a hot day in DEN Iv been well below MTOW and right on Max tire speed. A350 would be on (standard) tire limit somewhere around 271t, going at ISA+15/8000ft altitude elevation. Tire limit is then hit, at around 4700m takeoff run. JNB rwy is 4400m long, 5700ft altitude, ISA+15 usually at time of de...

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