Search found 467 matches

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by gloom
Tue Sep 22, 2020 5:14 am
Forum: Technical/Operations
Topic: The Long Range Playbook
Replies: 16
Views: 1949

Re: The Long Range Playbook

As a short introduction, and a checklist to what affects what. Order of items matters. For takeoff performance, you need thrust and wing area (or generally aero as a whole, if it's different to wing-and-tube) For climb gradient you need wing and thrust (except for rare occasions when one engine fail...

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by gloom
Tue Sep 22, 2020 4:55 am
Forum: Technical/Operations
Topic: Airbus studing aircraft flying in formation
Replies: 36
Views: 1574

Re: Airbus studing aircraft flying in formation

The difficult part is, how do you manage to make all these aircraft meet? Just a minute delay during takeoff or climb will result in several kilometers separation at the rendezvous point. And yet ATC manage to handle them all over the route. Delayed or not. "XXX, able to increase speed to .76?...

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by gloom
Mon Sep 21, 2020 6:09 pm
Forum: Technical/Operations
Topic: Airbus studing aircraft flying in formation
Replies: 36
Views: 1574

Re: Airbus studing aircraft flying in formation

That was my thoughts Starlionblue. Just the logistics of this seems impossible. Difficult sure, but not impossible. You can set airliners Mach speed to a 0.01 Ma at least (most of them with 0.001 step). On cruise, that's between 4 and 5 kts difference for 0.01Ma. When on NAT or Siberia route (Europ...

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by gloom
Wed Sep 16, 2020 12:13 pm
Forum: Civil Aviation
Topic: Aircraft Values, And Lease Pricing - Summer 2020
Replies: 26
Views: 4692

Re: Aircraft Values, And Lease Pricing - Summer 2020

In my opinion, it's a mistake for OEM's to reduce the production rate. In a way, you are right. We've seen few past years a race, where it wasn't about A vs B race, or price per unit, but about delivery time. If A321 would be available in 6 months instead of 6-8 years, it would be in much better ma...

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by gloom
Mon Sep 14, 2020 4:58 pm
Forum: Technical/Operations
Topic: Inflight Fire Question
Replies: 13
Views: 1415

Re: Inflight Fire Question

If there were to be an inflight fire, could the cabin be depressurized at a high altitude to essentially kill the fire? Short answer. Sorta. However, it probably wouldn't kill the fire in a definitive way. If a fire is uncontrollable, you need to set down ASAP. +1. You also gotta remember all those...

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by gloom
Sun Sep 06, 2020 10:44 am
Forum: Technical/Operations
Topic: Can the normal law in Airbus be overridden by the pilot? Question about Germanwings Flight 9525
Replies: 8
Views: 1146

Re: Can the normal law in Airbus be overridden by the pilot? Question about Germanwings Flight 9525

Why couldn't he disable the flight envelope protections from the circuit breakers behind and do a nose dive with the plane? Kinda difficult to make logic assumptions of irrational decisions. However, since he did a prolongued descend which was not a fastest way, I believe there was some form of &qu...

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by gloom
Sun Aug 23, 2020 6:22 pm
Forum: Technical/Operations
Topic: How long do ailines keep their passenger manifests?
Replies: 30
Views: 2024

Re: How long do ailines keep their passenger manifests?

it usually goes all the way to 5-7 years after departure This. I used to work for similar sector (rail pax transport), and basically there are legal obligations put on you. Invoice, claims, non used tickets, etc. And regulations differ from country to country, as a large airline you operate on many...

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by gloom
Sun Aug 23, 2020 5:53 am
Forum: Civil Aviation
Topic: Boeing 737MAX Grounding, General Discussion Thread, Q3 2020
Replies: 680
Views: 105232

Re: Boeing 737MAX Grounding News and Reference Thread 2020

Don't know if there will be a new name but calling it the 737-8 can lead to confusion with the regular 737-8. What is a regular 737-8? Most people here say it's possible to misread MAX to NG and NG to MAX. Well, sure enough they begin the same, but there are two more zeroes on NG. It's 737-8 vs 737...

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by gloom
Sat Aug 22, 2020 1:36 pm
Forum: Civil Aviation
Topic: Qatar Airways News and Discussion Thread
Replies: 200
Views: 15673

Re: Qatar CEO: no new Airbus or Boeing deliveries until 2022

Sokes wrote:
To which altitude can a B777-300ER with MZFW climb after take off on a 9 hours flight?


That would be around 635klbs. I can't find SOP at the moment, but from my memory it should be able to reach somewhere between F320 and F340.

Cheers,
Adam

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by gloom
Sat Aug 22, 2020 1:16 pm
Forum: Civil Aviation
Topic: Airbus A350 Production/Delivery Thread - 2020
Replies: 433
Views: 149812

Re: Airbus A350 Production/Delivery Thread - 2020

So if THEY can find the time and manpower to properly check and double-check everything post production....... Well, I guess it's more about how long it would take. If you take car complexity vs plane complexity, parts count of plane is probably three, or four magnitudes above car. I vaguely rememb...

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by gloom
Sat Aug 22, 2020 6:21 am
Forum: Civil Aviation
Topic: Airbus A350 Production/Delivery Thread - 2020
Replies: 433
Views: 149812

Re: Airbus A350 Production/Delivery Thread - 2020

...what they heck were they doing during pre-delivery checks?? Just seeing if the thing will get off the ground, then hoping that the rest just fell into place? Sort of. They are surely tested when install is completed on ground. Power on, works, power off. You don't need to be flying to switch on ...

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by gloom
Wed Aug 19, 2020 7:22 am
Forum: Civil Aviation
Topic: Airbus is stepping up development A321XLR
Replies: 231
Views: 37187

Re: Airbus is stepping up development A321XLR

LH is a hub airline focused on Frankfurt and Munich. It's no surprise that they don't favor subtypes that make hub bypassing possible. You seem to be missing one thing here. Big planes are for hub2hub connections. You don't go MUC to say YYZ on A321XLR, even if it's a route within range. For a numb...

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by gloom
Tue Aug 18, 2020 7:59 pm
Forum: Civil Aviation
Topic: Future Heavy Freight Aircraft (777X)?
Replies: 78
Views: 12523

Re: Future Heavy Freight Aircraft (777X)?

-other airports 380 t MTOW, with third landing gear. Still, no. Too much an investment, too much risk, not enough numbers to justify. I think if 77x-f ever happens, it will probably be 95% of the weight for 75 (or 80, or whatever the final plane will be) percent cost. After all, how often is 77F we...

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by gloom
Tue Aug 18, 2020 6:27 am
Forum: Civil Aviation
Topic: Future Heavy Freight Aircraft (777X)?
Replies: 78
Views: 12523

Re: Future Heavy Freight Aircraft (777X)?

I suppose landing gear could be strengthened. Not really. This aircraft is already at the pavement load limit, and you certainly don't want to limit this only to a couple of airports where they'd go even further with taxiway/runway strengthening, like it was with A380 gates. Adding a third landing ...

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by gloom
Sun Aug 16, 2020 11:18 am
Forum: Civil Aviation
Topic: Was KAL 007 saveable?
Replies: 24
Views: 8934

Re: Was KAL 007 saveable?

+1 to above. We cannot be sure, but even if engines survived, the missiles are created to be deadly. Warhead of R-98 missile is blast fragmentation, so probably it damaged both hull, and structures within hull. High chance it also damaged flight controls, both physical devices and cables/infrastruct...

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by gloom
Sun Aug 16, 2020 6:57 am
Forum: Civil Aviation
Topic: Is there a Business Case for a 787-9 regional
Replies: 102
Views: 15339

Re: Is there a Business Case for a 787-9 regional

I can't stop thinking (and questioning myself): is there a general case for regional WB? What is important here: 1. Economies of scale. The planes produced in hundreds are barely positive cash. "Sales hits" sell in thousands. 2. Assuming any WB could be scaled down by paper, any LR WB can ...

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by gloom
Mon Aug 10, 2020 7:00 pm
Forum: Technical/Operations
Topic: Widebody for two meter high belly cargo containers
Replies: 2
Views: 741

Re: Widebody for two meter high belly cargo containers

Is there even a demand for 2-meter belly cargo? Not really, unless you can fit standard ISO containers (8x8.5ft), there's no point to go bigger, I guess. Or, to say more precise, benefits are much less than costs. If you can fit that standard unit, it's quite heavy, but that's different story, then...

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by gloom
Wed Jul 22, 2020 6:20 pm
Forum: Technical/Operations
Topic: Parallel Runway Assignment
Replies: 15
Views: 1428

Re: Parallel Runway Assignment

In Munich, the runways are specifically assigned for landings (08R and 26R) and departures (08L and 26L). The reason is that the runways are longitudinally displaced in such a way that taxi times for both incoming and departing traffic are minimized. Thanks for the info. I remember going with my co...

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by gloom
Wed Jul 22, 2020 6:32 am
Forum: Technical/Operations
Topic: Parallel Runway Assignment
Replies: 15
Views: 1428

Re: Parallel Runway Assignment

Or perhaps this is very airport dependant and variable? This. A few famous examples from Europe: Heathrow - two independent, parallel 09/27. One is arrival, other departure. Both more-or-less equal in terms of runway length, so I think it's workload reduce config that's most usual, 27R arr, 27L dep...

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by gloom
Mon Jul 13, 2020 6:02 pm
Forum: Technical/Operations
Topic: How often is widebody used in short haul domestic flights?
Replies: 15
Views: 2637

Re: How often is widebody used in short haul domestic flights?

HEl-LHR -- although in my understanding that's partially dur to freight needs. I believe you wanted to point out HEL-LHR on A350. This is indeed due to cargo - it was large enough to justify A350 on the route. I believe the contract(s) have been mentioned in one of threads on 500+ tons monthly - so...

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by gloom
Sun Jul 05, 2020 6:36 am
Forum: Civil Aviation
Topic: A321 or 737-8 right size post covid?
Replies: 29
Views: 5078

Re: A321 or 737-8 right size post covid?

The incremental cost of flying a MAX 9 or 10 vs. an 8 (or 321neo vs. 320neo) CAN'T BE ZERO. The estimate of 500 pounds fuel burn per hour, and maybe another FA, has to be weighed against the probability the seats will be filled and at what fares. (WN is in a pretty good spot here: Just sub an -800 ...

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by gloom
Sat Jul 04, 2020 5:49 am
Forum: Civil Aviation
Topic: A321 or 737-8 right size post covid?
Replies: 29
Views: 5078

Re: A321 or 737-8 right size post covid?

Well, I think it would be useful to rephrase the question, to let others understand the question rather, than turn it into A vs B bashing. The recent trend has been to go towards larger one-aisle airplane. More A321 than 320, with 319 essentially dying. More 737-9 and 737-10 than 737-8, with 737-7 a...

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by gloom
Wed Jul 01, 2020 5:51 am
Forum: Technical/Operations
Topic: A350-1000 fuel burn
Replies: 114
Views: 17110

Re: A350-1000 fuel burn

But even without reading the rest its more than obvious that I mean one row of QSuites. No, not really. Whole thread bashing is about bigger or smaller. Exact QSuites number was brought up as a reply to claims Qatar 777 would pack 30 seats more. So, if you don't bring what "row" is, defau...

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by gloom
Tue Jun 30, 2020 5:34 am
Forum: Technical/Operations
Topic: A350-1000 fuel burn
Replies: 114
Views: 17110

Re: A350-1000 fuel burn

Four more QSuites means one additional row. Would you please be a little more analytic before posting, so we don't have to read claims like that? 4 QSuites means a whole row (4 abreast). Sure, that's one row. Of Qsuites, not economy. How much is the pitch difference QSuites to economy? Cheers, Adam

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by gloom
Wed Jun 17, 2020 6:55 am
Forum: Civil Aviation
Topic: Are there any jet alternatives to the 737-200C for gravel operations?
Replies: 100
Views: 17664

Re: Are there any jet alternatives to the 737-200C for gravel operations?

If we look at C130, perhaps a smaller turboprop would do as well, I mean something in class of CN295/C27J. It's not a lifter really, but should work gravel out of the box and have a cost similar to standard civilian aircrafts.

Cheers,
Adam

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by gloom
Fri Jun 12, 2020 5:29 am
Forum: Technical/Operations
Topic: Landing - Thrust Reverse and Brake
Replies: 33
Views: 2345

Re: Landing - Thrust Reverse and Brake

The A380 and A350 have BTV. Not, as mentioned, the 787. OK, passed by someone who was a pilot, I assumed he knew what he talked about. BTV doesn't decrease brake wear since carbon brake wear is related to the number of applications, not the braking force. The purpose of BTV is largely to decrease r...

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by gloom
Thu Jun 11, 2020 7:11 am
Forum: Technical/Operations
Topic: Landing - Thrust Reverse and Brake
Replies: 33
Views: 2345

Re: Landing - Thrust Reverse and Brake

Can the Autobrake setting be changed once the WoW has been triggered? It depends. As people explained normal system, I'll move on to some that do have such capability (even if probably different from what you expect). New WBs (I think both 350 and 787, I'm sure on 350) have a functions called by Ai...

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by gloom
Thu Jun 11, 2020 6:51 am
Forum: Technical/Operations
Topic: 747-400 climb performance when empty
Replies: 15
Views: 3174

Re: 747-400 climb performance when empty

All WB going empty will have an enormous climb possibility. I'd expect most of them being able to reach over 6kfpm, and going all the way to max certified alt within 15 minutes. There used to be a release from JustPlanes or similar, where 767 on regional route (pax, around 1hr trip) went to F410 wit...

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by gloom
Thu Jun 11, 2020 6:33 am
Forum: Civil Aviation
Topic: Airbus threatens to sue airlines
Replies: 104
Views: 20312

Re: Airbus threatens to sue airlines

I think that recovery looks like a basically linear trend. A scary proposition if desiring airlines to take aircraft as demand must grow faster to create a survivable plan to accept aircraft. Lightsaber The trend like this could go linear or as a logistic function (translation from my native langua...

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by gloom
Wed Jun 10, 2020 5:37 am
Forum: Civil Aviation
Topic: Airbus threatens to sue airlines
Replies: 104
Views: 20312

Re: Airbus threatens to sue airlines

This is especially true in recent years with many of the big orders that airlines have been placing (with OEM encouragement) to boost OEM’s numbers in order race that have had very favorable (for the airline) predelivery payment terms (again, to encourage large orders). I guess you're wrong to blam...

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by gloom
Mon Jun 08, 2020 8:17 pm
Forum: Technical/Operations
Topic: A339 performance for AirAsia X on KUL-Europe
Replies: 8
Views: 3001

Re: A339 performance for AirAsia X on KUL-Europe

Another thing with this route is the actual flying time is gonna be closer to 13-14hrs in a .82 aircraft. So it becomes a 6500nm route time Sure? .82 is roughly 470kts at F360. 13hrs is then around 6100nm. 14hrs checks 6500 (and even goes beyond) though. But overall, direct is 5723nm, add 100nm for...

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by gloom
Sat Jun 06, 2020 6:18 am
Forum: Technical/Operations
Topic: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?
Replies: 98
Views: 10736

Re: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?

Is that a function of climb thrust available? Not really. It's a wing load function on most modern airliners. For two holers, excess of thrust is significant enough to not worry about climb thrust, and as a result optimum FL (where the drag at given speed/weight is minimum) is below max FL (defined...

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by gloom
Sat Jun 06, 2020 6:05 am
Forum: Civil Aviation
Topic: Airbus threatens to sue airlines
Replies: 104
Views: 20312

Re: Airbus threatens to sue airlines

They have not solved the core problem of financing, ie what do we do when a large customer has liquidity problems, or worse even, what do we do when all customers have a liquidity problem. Actually, I feel they learned their lesson. Many NTUs were not a problem for Airbus. Still, this is just my op...

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by gloom
Mon Jun 01, 2020 2:47 pm
Forum: Technical/Operations
Topic: European Routing and CFMU Validation
Replies: 6
Views: 1558

Re: European Routing and CFMU Validation

Sorry, cannot edit previous. Had a bunch of talks with my friend, who's a area ATC, working with GAT. Mil traffic has its own routes on approaches usually, that means in most cases 2000ft or less, and outside of controlled area. In controlled airspace they have dedicated OAT controllers, but otherwi...

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by gloom
Mon Jun 01, 2020 7:05 am
Forum: Technical/Operations
Topic: European Routing and CFMU Validation
Replies: 6
Views: 1558

Re: European Routing and CFMU Validation

Is there still OAT military only routes in Europe? I can only speak for my country, but yes, in Poland there are still a few. Mainly as approach routes to large mil bases. Probably the same with other countries where large airbases exist (Rammstein, anyone?). There are maps in MIL AIP showing these...

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by gloom
Mon Jun 01, 2020 5:32 am
Forum: Civil Aviation
Topic: DL to permanently retire entire 777 fleet
Replies: 763
Views: 122989

Re: DL to permanently retire entire 777 fleet

So what is the engine performance like for the 77W out of DXB on a 114F day compared to the same 77W out of JNB at 77F but at its 5 558ft altitude? I have no time to do extensive check, so forgive me if you did the check (you probably did). The problem with JNB is not only high. Everyone is conside...

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by gloom
Sun May 31, 2020 6:51 am
Forum: Civil Aviation
Topic: Delta Widebody Thread - 2020
Replies: 450
Views: 92393

Re: Delta Widebody Thread - 2020

atlflyer wrote:
When will Delta take delivery of this plane? This is their 14th A350?


Usually? 20 to 30 days from taxi to delivery-ready pre-covid.

We're in the covid though, and sometimes you would need some extra time to accept. I'd say July, or late June if they need them ASAP.

Cheers,
Adam

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by gloom
Mon May 25, 2020 8:52 pm
Forum: Technical/Operations
Topic: Costs of using Antonov 225
Replies: 8
Views: 2953

Re: Costs of using Antonov 225

Yeah, general reason to use An124 or An225 is LHC (Large Heavy Cargo). Something you can't take on standard Cargo plane, or as a pallet in passenger plane. However, recent run of transports aboard An225 I believe has two reasons: 1. Many governments making marketing show ("listen kids, we broug...

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by gloom
Fri May 22, 2020 8:24 am
Forum: Civil Aviation
Topic: DL to permanently retire entire 777 fleet
Replies: 763
Views: 122989

Re: DL to permanently retire entire 777 fleet

A359 ACP shows 1st knee - max structural payload range - at 5500 nm. But there are so many variants. Not just weight variants, but the new wing twist, new winglet, and XWB-EP engine. Airbus doesn't specify which variant is covered by the chart. So we are left to assume. A lot. Actually, current one...

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by gloom
Fri May 22, 2020 5:08 am
Forum: Technical/Operations
Topic: European Routing and CFMU Validation
Replies: 6
Views: 1558

Re: European Routing and CFMU Validation

I've had to get used to having sometimes very strange looking routes that zig-zag around to avoid certain areas due to restrictions on airspace, altitudes, airways, etc. So true. But with FRA, it's definitely getting better. I actually wanted to use a route into EDDM as example, and did some routin...

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by gloom
Fri May 22, 2020 4:54 am
Forum: Civil Aviation
Topic: DL to permanently retire entire 777 fleet
Replies: 763
Views: 122989

Re: DL to permanently retire entire 777 fleet

Could you share a source? I’m not saying you’re wrong but 2% seems exceptionally high. I thought the incremental gains between the previous WV (that Delta first received) and the latest was much lower than that. Yeah, always such statements should come with support. 1% gain on twist/winglet improve...

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by gloom
Fri May 22, 2020 4:50 am
Forum: Civil Aviation
Topic: DL to permanently retire entire 777 fleet
Replies: 763
Views: 122989

Re: DL to permanently retire entire 777 fleet

The 6321 nmi figure was given by Delta. I don't think they have any reason to lie. Actually I've had a look and it's almost exactly 5500nm. Could it be range at MTOW? But then, just to keep apples to apples, we need to say the truth. 787-9 range is barely 6000smi. And 787-10 is at 4800smi. Sounds r...

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by gloom
Thu May 21, 2020 8:58 pm
Forum: Civil Aviation
Topic: DL to permanently retire entire 777 fleet
Replies: 763
Views: 122989

Re: DL to permanently retire entire 777 fleet

The 6321 nmi figure was given by Delta. I don't think they have any reason to lie. To believe one source and disregard so many more showing fuel flow, weights and all other details. One source, that is there for average passenger, not a statement showing conditions etc. Well, how to state one that ...

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by gloom
Thu May 21, 2020 5:42 pm
Forum: Civil Aviation
Topic: DL to permanently retire entire 777 fleet
Replies: 763
Views: 122989

Re: DL to permanently retire entire 777 fleet

280T vs 275T doesn’t help JNB-ATL. Seems most people are not taking this information into account. The extra MTOW isn't going to enable a JNB-ATL nonstop, because MTOW is not the limiting factor. That's only half truth. 280t version came with some significant improvements. One is the weight (MTOW) ...

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by gloom
Wed May 20, 2020 6:02 pm
Forum: Technical/Operations
Topic: European Routing and CFMU Validation
Replies: 6
Views: 1558

Re: European Routing and CFMU Validation

NOP offers explanations and also points out to RAD issues. Most of RAD explanations offer alternate routings, or explains fixes. If you have any particular problem(s) with route, let me know and I'll see what I can do. I never ever encountered a route that I was not able to fix with RAD explanations...

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by gloom
Wed May 20, 2020 5:59 pm
Forum: Technical/Operations
Topic: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?
Replies: 98
Views: 10736

Re: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?

The “270 tonne limit” is not a runway limit, it is related to something in a standard takeoff path some distance from the airport. Info about fuel copied, thanks. However, 270 tonne (or 272 from my approx) limit is straight from ACAPS. For following conditions I used: Local temp: +13C (ACAPS says I...

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by gloom
Wed May 20, 2020 5:16 am
Forum: Technical/Operations
Topic: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?
Replies: 98
Views: 10736

Re: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?

[ Just get the OEW for both and add the weights Zeke gave you - then you’ll have your answer. See MoKa's answers. Numbers seem to be quite off - sure, weather could be real factor, but since TOW expected in these conditions maxed at around 270t, and OEW at ~136t consensus, math doesn't add up. 136+...

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by gloom
Tue May 19, 2020 5:48 pm
Forum: Technical/Operations
Topic: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?
Replies: 98
Views: 10736

Re: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?

I did a flight plan for today, the 77L would carry 32 tonnes of payload, and burn 126 tonnes of fuel for the sector. The A359 would carry 43 tonnes of payload, and burn 102 tonnes of fuel. Zeke, would you be so kind to disclose TOW for both? I guess that would say a lot about how limited are planes...

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by gloom
Tue May 19, 2020 8:42 am
Forum: Technical/Operations
Topic: RR CTi Fan Colour
Replies: 5
Views: 1213

Re: RR CTi Fan Colour

Just out of curiosity, why does the RR version have the turquoise color while the GE version is black? I've toured a UA engine shop before and held a GE90 fan blade in my hand, and the black color is not paint, but is the actual color of the carbon "fabric." As mentioned above - since it'...

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by gloom
Mon May 18, 2020 4:09 pm
Forum: Technical/Operations
Topic: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?
Replies: 98
Views: 10736

Re: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?

Does anyone have some figures about the actual payload numbers for this route using the B77L? You have not specified what actual payload is. Average? Some real life examples accompanied by weather conditions? I also don't think it would be really revelant to this discussion. For a number of reasons...

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