Airliners.net

gloom

Re: FOD penetrates the fuselage of a UX787 in SDO

Kikko19 wrote:
Alu would have performed better?

Not likely, but would be cheaper to repair.

I remember the 787 is one of most requiring aircraft in terms of ACN/PCN, wonder if debirs was self-caused, or existing from previous traffic. And if it's a one-off, or a trend we're going to see more often.

Cheers,
Adam

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gloom

Re: Can Cargo airlines fly above FL410?

If the A350 had a low enough payload and regulators or airlines allowed it, could it make it up to FL450 or higher? Depends on what we call "make it". I was in A350 with MTOW 253t flight on HKG-HEL, which cruised F430 for approx 3hrs. So, technically speaking, yes, empty A350 would be abl...

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Re: Boeing 737 MAX Fails Dozens of Tests in FAA Audit

Can you meet the standards without meeting the underlying procedures? From my past experience in different sector (similar), but with similar procedures. Can you meet the standards? Yes, in most cases. What the procedures give, is consistency. Without procedures, you will fail more frequently. At l...

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Re: Single engine failure on a twinjet SOP questions

One quick question, sort of side to op topic, but very much in a context. Has there ever been a need to go glide for technical (solely technical, like in broken) reason, on twin? I know of a couple (two or three come to my mind) stories where fuel was the reason (doesn't fit this context though; ple...

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Re: Airbus Looking for Potential Delivery Spots for United

I read into it that getting A321NEO fast is more expensive than United is ready to pay, even after throwing in the A350 ... It's Boeing's to lose, and I believe UA is in strong position to expect Boeing to throw in some cash for those delays. And it could/would be used for 321 lease. I'd say it's a...

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Re: Boeing 737 MAX Fails Dozens of Tests in FAA Audit

Perhaps it’s more accurate to say the FAA believes the 737 MAX being delivered by Boeing meet all requirements. I'd say that a bit over the line as well. But it's your call. 737MAX delivered by Boeing is safe to fly (assuming all necessary standards are met). It's the only matter for FAA. It doesn'...

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gloom

Re: Boeing 737 MAX Fails Dozens of Tests in FAA Audit

The FAA appears to be satisfied with the current status to some degree based on the fact it continues ticketing airplanes for delivery. Definitely not a black and white situation. Heck me. To tell "Definitely not a black and white situation.", and a phrase above to tell "The FAA appe...

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Re: Airbus Looking for Potential Delivery Spots for United

So, rather than build the production slots that were supposed to be Max 10s that are useless (for the moment) to United, they want Max 9s instead - planes that, despite their flaws, they can actually use. I think this is the true statement. They need the fleet to grow now, not in 5 years, so they a...

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gloom

Re: Nautical Miles vs Miles?

That is not understood "everywhere else", but only in the US. The rest of the world still have to convert it to understandable SI units. Sure, but that's not the point here. Most applications for weather equipment are used outside aviation, so it's cheaper to calibrate to whatever the loc...

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gloom

Re: Nautical Miles vs Miles?

No reason it couldn’t be calibrated for nautical miles Remember weather equipment is used (mostly) outside of aviation world. Probably cost of different tuning exceeds the cost. And everywhere else, you want and need to have units that people understand. Visibility of 200ft? Okay. 0.3 nautic miles?...

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gloom

Re: Boeing’s Troubles

It is impossible for a CEO of even smaller companies to know everything that a company does. The key is to know what you know and recognize there are things you don't know, and then rely on qualified and trusted individuals who do know what you don't know. You have to surround yourself with advisor...

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gloom

Re: Does domestic competition still hold true today?

Any idea from where the radical concept would come from or what it would be (ex. Composite engineering or revolutionary assembly line concept)? A couple. Massive powerplant change, supersonic allowed, growing capabilities of ground transport, and any other changing the market as we know it (economy...

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Re: Does domestic competition still hold true today?

Embraer most successful, I guess, but thirty years since they started RJs, they still develop RJs, never managed to develop mainline. In fairness the E190/195 is as mainline as the original DC-9. They are heavier, carry more people over a much longer range, and have been operated as part of the mai...

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gloom

Re: Does domestic competition still hold true today?

After the McDonnell Douglas merger with Boeing, there was never any idea to explore another U.S. passenger aircraft builder. With current concept, there will never be. Many have failed for the past years. Not only in the US. Remember BAe? Convair? MDD? Fokker? MBB? Lockheed was also a passenger pla...

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gloom

Re: Could Embraer build a larger jet to compete with MAX and NEO

Remember, the mainline is moving from 150+seats region to 200+ seats region. While I can see both Embraer and Airbus 220 going for 150-160 seats plane, and actually having a nice share there, the market moving towards Max9/Max10/A321 is where the share rises. And I don't see Embraer as being able to...

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gloom

Re: UA possibly cancelling 73M10 order?

The MAX 10 may not match the a321neo's capabilities 1 to 1 but it should surely make up for that in terms of operating costs . Problem here is some think the MAX 10 doesn't possess any merits over the a321neo , but it does This is a statement, not an opinion. Numbers? The only real advantage I see ...

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gloom

Re: UA possibly cancelling 73M10 order?

There are other options. C919. How does capacity on the C919 compare to the 73M? Length is 1.5m more than A320 and 5.5m less than A321 (+5ft on A320 and -18ft on A321). Probably in range of 200seats, no match for either A321 or M10. Even if considered option with plenty of "ifs" concernin...

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Re: A350-1000 take-off weight hiked to 322t

Why do you expect restrictions for the A350-1000 in JNB? Is the answer "A35K seems to have more penalty on hot&high, based on ACAPS" enough? I'd say, it should be. But I guess most people commented before checking ACAPS before. OK, so first things first. JNB is hot and high. We're tal...

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Re: A350-1000 take-off weight hiked to 322t

JNB-ATL This answers your own question. From a specific airport such as JNB, MTOW is not a factor. It is the weather (air density) for every and each plane. Since A350-1000 is hit more with altitude restrictions (as % reduction of TOW compared to MTOW), it's not going for full pax&bags on the r...

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gloom

Re: Short-haul flights at high altitudes

https://aerotoolbox.com/airspeed-conversions/

Cheers,
Adam

gloom

Re: GPS spoofing in middle east

Is there any idea why these things are so easy to corrupt? Af GPS is 1980s technology. People were much less concerned about cyber security those days. I wouldn't say it's the reason. It has more to do with signal power (transmitted by satellites which are usually power-limited), and electronic war...

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Re: IAG in talks to replace BA 777s

I recall discussions of pavement loading and the 787 does not have the pavement loading of the 77W as an example, You're right, it's not 77W. To be fair, though, nothing is close to 77W being No1 in both ACN and PCN, The difference to 787 (both 9 and 10, since these use same weights and bogey layou...

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Re: AF/KL Shopping for 50+ Widebodies

this is not the IGW version which has 6.4 tonnes greater payload U sure? I was pretty sure it's MTOW raise, not MZFW raise. Your statement is then not correct. Any link to support this statement? A Correct, it's a 6.4 ton MTOW bump. So, for current range-constraint routes it will provide a boost in...

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Re: AF/KL Shopping for 50+ Widebodies

ElroyJetson wrote:
this is not the IGW version which has 6.4 tonnes greater payload

U sure?

I was pretty sure it's MTOW raise, not MZFW raise. Your statement is then not correct.

Any link to support this statement?

A

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gloom

Re: Airbus and Boeing Orders - 2023

Airbus August 2023 orders UNDISCLOSED - 12 A321neo WIZZ AIR - 75 A321neo AIR ALGERIE - 5 A330-900 AIR ALGERIE - 2 A350-1000 AVOLON - 20 A330-900 UNDISCLOSED - 3 A330-900 ====================== Gross orders 117 https://www.airbus.com/en/products-services/commercial-aircraft/market/orders-and-deliver...

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Re: A380 Max Pax Payload

Just found a payload diagram for A380 on the Internet. It says maximum passenger payload is 52 tons. But Airbus claimed that max pax capacity is 893 passengers. That 58kg per person. Even Asian elementary students weigh more. How did they plan to achieve this capacity with such a tiny payload? Read...

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Re: Short-haul flights at high altitudes

Descend nearly balances climb in terms of fuel burn. So, the higher you go the more efficient you get. I'd bet ballistic (climb-to-descend profile) will most likely be most effective in most cases. When Japanese used their 767 for one-our flight between Japanese cities, quite often it was 0-F410-0 i...

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Re: A350 Engine / T/O Performance

Runway distance used is only one factor when it comes to takeoff performance. Often, a lot of the limiting factors happen after liftoff and beyond the runway itself. Agree 100%. Now, which has the better climb performance: better wing or more thrust? You know the answer, right? Having said that, OP...

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Re: A350 Engine / T/O Performance

I certainly find from experience that the A350, near MTOW, is more runway limited than an equivalently loaded 777. Challenge accepted. Numbers at ISA conditions, could be a bit off reality since I've had to do with publicly available data (which are quite often just a guess) MTOW: 350-1000: 2900m, ...

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Re: A350 Engine / T/O Performance

The A350 is only an average takeoff performer for a twin. I would not say that, for a very reason you mention: That is a result of the pursuit of efficiency in which the new generation of airliners are basically not given a pound of thrust they don't desperately need... I understand the 787 is basi...

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Re: How much force to pull a Vulcanair?

https://www.engineeringtoolbox.com/plan ... _2083.html

Seems you need approx 200N per every ton to roll. AFAIR, 2 to 3 times more to overcome static friction, so likely in the range of 500N to start moving.

Cheers,
Adam

gloom

Re: MIT unveils a megawatt motor

There are existing electric motors with 10+MW power. I guess it's not a problem of delivering a motor with enough power, more of a building it to allow cooling and/or increase power to mass weight (those electric motors are way heavier/larger than turbine ones). I think talking about electric planes...

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Ability to develop sophisticated aviation products in China/Russia

Hello, I was looking for the best forum to share my thought, and I think it fits best here. I've read an interesting discussion in Polish press about automotive market, why Chinese are not able to produce state-of-the-art electric cars even though it seemed to be something they invested so much and ...

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gloom

Re: US ATC Specialist - "Good Rate"

atcsundevil wrote:
In any case, I never rely on ambiguous phrases like (...) "expedite" because it leaves room for interpretation.

Does it really?

I believe it means "max climb, green dot", at least for bus drivers. Not much space for interpretation, really.

Cheers,
Adam

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gloom

Re: Rumor: American Airlines considering flying to SIN

Explain PER-LHR westbound at over 200 nmi longer. Longitude. PER-LHR flies quite a part of flight near equator, where wind component is MUCH lower. Check wind map at windy.com and FL390, for example. Also, explain why it will not work with 6 tonnes more fuel with the IGW version of the 789. Easy. A...

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gloom

Re: Tracking UA's 753s overwater

FR24 and FA are definitely not relying on data that is 5 minutes old, as they show accurate positions for ADS-B out equipped aircraft in most situations. They used to, a couple of years ago. Back in the days, when ADSB was not so popular, both in terms of plane equipment and receivers. Cheers, Adam

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gloom

Re: Tracking UA's 753s overwater

Obviously ATC has different receivers and if their receiver data is accessible by the flight tracking sites, then the sites would have better coverage. That's what I'm asking, and his answer was uncertain with the 5 minute stuff. FAA did (does?) redistribute flight data (not the ADSB data) to FR24....

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Re: Tracking UA's 753s overwater

Question for the Tracking site experts....I thought they depended on the aviation enthusiasts who buy the ADSB receivers and connect to the internet. Do any of the tracking sites actually use Air Traffic Control ADSB data to supplement the civilian trackers? I guess you're messing out some things h...

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gloom

Re: Number of sims in a major airline

Trimeresurus wrote:
It would be pretty cool if simulating 0g in a stationary environment was possible. Would be quite the tourist attraction

Actually it is possible, just not at any station available to public.

Check the Kraken Disorientation Device.

Cheers,
Adam

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gloom

Re: Airline Cruise Speed changing over decades

Would that be something to do with the higher bypass ratio? Would the new generation aircraft generally climb slower at high altitudes? Exactly this. As a reason. An effect is growing fan for the same thrust, and as ram drag is increased with diameter, net thrust at high-fast is lowered. Hence lowe...

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Re: Why crosswind only runways?

Starlionblue wrote:
Yes, I'm looking at you, HKG.

Well, they progress anyway. Yes, I'm looking at you, KaiTak

Some places, even the winds seem to blow the wrong way.

Cheers,
Adam

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gloom

Re: Engine Derates and top-of-climb power

Hence why cruise power is pretty near maximum. Near maximum by what metric? Certainly not by shaft power or fuel flow. Near maximum achievable at that altitude? From what I get from pilots here, if there is enough power to climb - it makes economic sense to do so.. Would N1 and/or EGT be near maxim...

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Re: Operating costs: 2x A321XLR vs 1 widebody

2 A321 disadvantages vs A330: * 4 engines less efficient than 2 * 4 cockpit crew flying is less efficient than 2 * 2 gates is less efficient than 1 * 2 landing fees is less efficient than 1 Isn't that all included in the CASM? CASM should have all flight costs, including crew, gate & landing co...

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Re: Fan with electric core - possible?

So basically there are no hard, technical problems there with such a concept, it's more an issue of fuel volume/range limitations as such, and fuel availability.

Thanks for your input.

Cheers,
Adam

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gloom

Re: Fan with electric core - possible?

If you can magically store H2 with total energy density per weight and per volume better than that of kerosene, you may start talking drop-in replacements. I'm well aware of lower energy density of H2 liq. https://www.energy.gov/sites/default/files/styles/full_article_width/public/fcto_storage_fuel...

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Fan with electric core - possible?

Since most airliners currently in production are built to a specific configuration (turbine jets under the wings, ever bigger fan blades around smaller, more efficient cores=higher bypass), I was wondering if anyone can help with three questions. These are sort of expanding on each other: 1. I belie...

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Re: Why do different cities in India have different transition altitudes?

AFAIK, the reason ATC sets a transition level is due to QNH variations. The TL at any given time would be on the ATIS. This is usually where an ATC makes sure TL is higher than TA. For my country TA is 6500, TL is F80, but once the pressure is high enough to offset 1500ft (yeah, I know that's a lot...

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Re: Turboprops vs Turbofans.... and Propfans!

What is reasonably achievable if someone has some loose change of couple $10Bs? Reasonable for, say, NYC-FL service with longer trip with "it's green!" slogan? How would operational economics look like? We have no platform to actually compare apples to apples. If/when Embraer delivers fir...

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Re: Turboprops vs Turbofans.... and Propfans!

As far as I remember, service ceiling is a significant factor. Dash-8 and ATR are limited below FL300, while RJ can go over FL400. Are you aware it's not a powerplant limit, but a general choice of aerodynamic efficiency vs payload vs range? There are turboprops able to go way above F300. Dash8 and...

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Re: Absurd CX LHR-HKG flights avoiding Belgian airspace

berari wrote:
What drivers can you think of for this?

Airspace capacity. Belgium is a small country with traffic passing north to south, east to west. I guess the original poster could be right with limits.

Cheers,
Adam

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