Search found 617 matches

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by gloom
Thu May 26, 2022 6:21 am
Forum: Technical/Operations
Topic: E2 Fleet Fuel Burn / Consumption Numbers
Replies: 1
Views: 294

Re: E2 Fleet Fuel Burn / Consumption Numbers

https://www.icao.int/Meetings/ENVSymposium/Presentations/Arnaud%20Bonnet%20Session%206%20print.pdf Number for 190E2 vs 190E1, but probably more or less similar. For the entire family, Embraer promises double digits, and seems they exceed that by a good margin. Also: https://ri.embraer.com.br/Downlo...

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by gloom
Tue May 24, 2022 9:30 am
Forum: Civil Aviation
Topic: Embraer New Turboprop Aircraft News and Discussion Thread
Replies: 626
Views: 103185

Re: Embraer New Turboprop Aircraft News and Discussion Thread

At FL350 in a A321 I can do .75-.82, I cannot go below. And no way do I want to hang out at .75. But it's only wing/weight/power that limits coffin. Beech B350 flies at F350 on speeds like 300 KTAS. That's something like .52Ma, or 170 KIAS. Perfectly safe and possible. I'm perfectly sure Embraer wi...

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by gloom
Sun May 22, 2022 9:29 am
Forum: Civil Aviation
Topic: A350-900 now has a 283t MTOW
Replies: 126
Views: 25445

Re: A350-900 now has a 283t MTOW

There is the derated A359 but that is still the same aircraft as the standard A359. Not really. https://www.easa.europa.eu/sites/default/files/dfu/EASA%20E111%20TCDS%20issue%2012_Trent%20XWB.pdf If the plane is going to be permanently regional, you could opt for TXWB-75, TXWB-79 or TXWB-79B. Sure, ...

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by gloom
Sat May 21, 2022 8:58 pm
Forum: Technical/Operations
Topic: STARs with INS
Replies: 19
Views: 1351

Re: STARs with INS

GalaxyFlyer wrote:
RNP procedures


Yup, I wa thinking RNP, yet used INS. Thanks for correction.

Cheers,
Adam

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by gloom
Sat May 21, 2022 6:51 am
Forum: Civil Aviation
Topic: A350-900 now has a 283t MTOW
Replies: 126
Views: 25445

Re: A350-900 now has a 283t MTOW

Closer to 270-273, depending on conditions. Something like that, but when I ran the numbers, it was at ISA +15. As said, conditions could make a difference as large as 1t per 2 degs C (4 degs F, if you prefer). On ISA (say night departure) MTOW would be available, perhaps even for 280t bird. Cheers...

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by gloom
Sat May 21, 2022 6:44 am
Forum: Technical/Operations
Topic: STARs with INS
Replies: 19
Views: 1351

Re: STARs with INS

So yes, there are plenty of ground based NAVAID STAR procedures still in place. Agree. Still, one of the reasons to put INS procedures in place is gaining some extra capacity. That's what they're for. From capacity planning perspective, "it's not what you asked for". And I've seen people ...

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by gloom
Fri May 20, 2022 10:49 am
Forum: Technical/Operations
Topic: STARs with INS
Replies: 19
Views: 1351

Re: STARs with INS

how were arrivals into airports flown with the non-RNAV compliant INS? I assume it is "how were INS arrivals..."? Simple answer - were not. There are requirements for STAR procedures. And stated on STAR approach plates and/or airport description. Unable? Not using these. You can use any o...

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by gloom
Tue May 17, 2022 4:56 am
Forum: Technical/Operations
Topic: Empty Weights between first and last off the line
Replies: 17
Views: 2806

Re: Empty Weights between first and last off the line

zkojq wrote:
Thanks. And these were of exactly the same spec I assume?


Yup, all within same specs.

Cheers,
Adam

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by gloom
Mon May 16, 2022 9:08 am
Forum: Technical/Operations
Topic: Empty Weights between first and last off the line
Replies: 17
Views: 2806

Re: Empty Weights between first and last off the line

I'm curious about how similar the weights will be for sister aircraft coming off the production line next to one and other. Like if two aircraft are built to exactly the same spec how much will the weight vary between them? Are we talking about tens of kilos? 50? 100 would seem a lot, especially fo...

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by gloom
Wed Apr 06, 2022 6:40 pm
Forum: Technical/Operations
Topic: Why A330 P2F but no A340 P2F
Replies: 19
Views: 2609

Re: Why A330 P2F but no A340 P2F

What is the OEW difference between a A333 and a A333 P2F? Not exactly the thing you ask for, but there was an estimate on A350F thread, and I believe it was somewhere in 10..15T area. Depends a lot on required (or not, maybe some operators would take passenger floor for volume cargo) strengthening ...

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by gloom
Mon Apr 04, 2022 7:28 pm
Forum: Technical/Operations
Topic: How feasible is this new RNP 20 approach of Kathmandu for wide bodies?
Replies: 6
Views: 2101

Re: How feasible is this new RNP 20 approach of Kathmandu for wide bodies?

Yes exactly, RNP 20 would be a bit tricky in that area. Looking at the charts, it's RNP 0.3 required. Attached chart says RNP1 STARs and RNP0.3 RNP AR approach - page 18. Taking the final turn under considerations, they seem to be 2.5nm radius turns on page 43. With speed 165kts IAS max at KT421, a...

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by gloom
Mon Apr 04, 2022 7:13 pm
Forum: Technical/Operations
Topic: Altitude of the static 6g maneuver?
Replies: 13
Views: 1871

Re: Altitude of the static 6g maneuver?

The fighter aircraft can be designed to take more g's than the pilot can take, but that means adding strengthening materials and weight. GD designed the F-16 to handle 9's (+ some margin) because that's the max what most pilots can sustain. The point you raise is valid, but not completely adequate....

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by gloom
Sat Apr 02, 2022 9:03 am
Forum: Technical/Operations
Topic: Altitude of the static 6g maneuver?
Replies: 13
Views: 1871

Re: Altitude of the static 6g maneuver?

As for fighters, if I remember correctly a just under 10g requirement (not sure at what weight) is limited by pilot, not by (actually stronger) airframe. Correct. Most fighters are rated +9/-3 g I believe, and this is indeed human factor limited. Once pilot is removed from equation, most current je...

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by gloom
Thu Mar 31, 2022 7:54 pm
Forum: Civil Aviation
Topic: Cathay Pacific News and Discussion Thread - 2022
Replies: 87
Views: 13335

Re: Cathay Pacific to launch the world's longest flight ever

crwxxx wrote:
The typical cruise Mach Number for the A340 is around M0.82 Vs A350 M0.85


.82 Ma is for 342/343 versions. On 345/346, you'd have a hundredth more, typical at .83 (subject to operator policy).

Cheers,
Adam

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by gloom
Wed Mar 30, 2022 6:19 am
Forum: Civil Aviation
Topic: China Eastern 737-800 crashes in Guangxi, southern China
Replies: 1166
Views: 430456

Re: China Eastern 737-800 crashes in Guangxi, southern China

the weakest point is likely the feet on the chips where welds may break, necessitating repairs prior to data readout. A crash of this magnitude is likely to result in such scenario. I believe the board itself will break way sooner than chip legs themselves. Anyways, a wafer and data inside would pr...

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by gloom
Wed Mar 30, 2022 5:53 am
Forum: Civil Aviation
Topic: China Eastern 737-800 crashes in Guangxi, southern China
Replies: 1166
Views: 430456

Re: China Eastern 737-800 crashes in Guangxi, southern China

Those speeds are transmitted when ground speed is not available. Correct. Ground speed was available in this case. Probably true, but I guess 0.3% statistically mentioned in the document above gives a slight chance for TAS frame. As I mentioned before, we'd know if we looked at all received frames....

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by gloom
Wed Mar 30, 2022 5:44 am
Forum: Civil Aviation
Topic: China Eastern 737-800 crashes in Guangxi, southern China
Replies: 1166
Views: 430456

Re: China Eastern 737-800 crashes in Guangxi, southern China

That is roughly 3600G. So we are at the very limit of the forces the black box can take. Two factors here, I guess: 1. assuming it felt off the sky in (more or less) one big piece, the boxes started deceleration higher than at the ground level. It is not confirmed, but I guess quite possible there ...

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by gloom
Tue Mar 29, 2022 6:14 am
Forum: Civil Aviation
Topic: China Eastern 737-800 crashes in Guangxi, southern China
Replies: 1166
Views: 430456

Re: China Eastern 737-800 crashes in Guangxi, southern China

As Zeke mentioned, you can't derive True Airspeed from the FR24 data. Not true. You can't from public available data. But remember, this is a global network of ADS-B receivers. ADS-B messages do carry velocity data (IIRC, it's twice a second). ADS-B frames can carry all necessary speed info - IAS, ...

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by gloom
Mon Mar 28, 2022 6:52 pm
Forum: Civil Aviation
Topic: Delta Fleet Thread - 2022
Replies: 895
Views: 174642

Re: Delta welcomes its 1st Airbus A321neo

maps4ltd wrote:
Yeah that's odd. Flightradar24 also has it blocked.


Probably asked by airline & agreed by sites. ADSB Exchange has no problem whatsoever tracking it (found a past flight, so at least it seems so).

Cheers,
Adam

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by gloom
Sun Mar 06, 2022 10:56 am
Forum: Technical/Operations
Topic: How do pilots keep track of so many waypoints for long haul flights?
Replies: 13
Views: 2591

Re: How do pilots keep track of so many waypoints for long haul flights?

AirKevin wrote:
But I don't think you can just type in Track Z and expect waypoints to show up.


No. They preload routing from departure to entry, and from exit point to destination. Track might (and usually will) be different day to day, so that's the manual part.

Cheers,
Adam

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by gloom
Sun Mar 06, 2022 8:11 am
Forum: Technical/Operations
Topic: How do pilots keep track of so many waypoints for long haul flights?
Replies: 13
Views: 2591

Re: How do pilots keep track of so many waypoints for long haul flights?

But if you’re doing oceanic tracks that change daily or random routes then you can’t take advantage of that. Sure? At airline I know, they used constant routing to-from track. So basically you have to use on- and off-routing as a preselect, and then simply add track intersections. Sometimes dispatc...

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by gloom
Sat Feb 26, 2022 6:12 pm
Forum: Military Aviation & Space Flight
Topic: Russian Invasion of Ukraine - Military Aviation News and Discussion Thread
Replies: 945
Views: 125923

Re: Invasion of Ukraine - Military Aviation

If we get nuked they get nuked right back and we all die. Would Putin go nuclear to save his foreign adventure in Ukraine knowing that such a decision would mean the complete destruction of Russia? The Russian warfare assumes limited tactical nuke strikes are "quite safe" - so, until you ...

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by gloom
Mon Feb 14, 2022 9:17 pm
Forum: Technical/Operations
Topic: Fly-by-wire project help
Replies: 18
Views: 2107

Re: Fly-by-wire project help

And at times the PNF had no idea what the PFs plans were. Exactly this. And exactly this should be addressed by CRM. On the other hand: I know you Airbus guys defend your aircraft whenever necessary. This is your statement, actually opposite to your (unverbalized) proper understanding - see above q...

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by gloom
Fri Jan 28, 2022 7:25 am
Forum: Technical/Operations
Topic: Turbofan throttle response
Replies: 18
Views: 2401

Re: Turbofan throttle response

Whereas piston engines normally operate in the range of 40 percent to 70 percent of available rpm, jets operate most efficiently in the 85 percent to 100 percent range, with a flight idle rpm of 50 percent to 60 percent. The range from 90 percent to 100 percent in jets may produce as much thrust as...

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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: 435
Views: 62448

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: 435
Views: 62448

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: 68378

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: 68378

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: 2847

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: 116
Views: 28683

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: 307
Views: 103170

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: 116
Views: 28683

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: 307
Views: 103170

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: 2009

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: 216595

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: 216595

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: 1945

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: 327947

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: 2370

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: 2370

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: 217784

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: 16965

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: 216595

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: 1118

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: 2023

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: 1024

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: 2016

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: 4367

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: 4367

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: 4367

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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