If you select a fixed derate on a FBW Airbus, how do you set thrust for takeoff? Do you put the thrust levels in the second detent - before full TO/GA - just like you do for Flex Power? The only difference is what takeoff thrust setting you selected in the FMC? Exactly the same as Fkex, instead of ...Jump to post
Slightly off topic: But do other people find CX J service lacking? Last time I flew the crew forgot to distribute menus, then they forgot to ask half of the cabin what they wanted. People were sitting with their menus on their laps for ages. Then they forgot to collect the menus, and forgot the bri...Jump to post
Sound like it works more like the 737 than other Boeing models. Sounds like you are selecting an actual derated rating like 24,000 lbs. The other models just select a percentage derate, usually 10% and 20%. When derated takeoff is available, 6 certified levels exist, ranging from D04 (TOGA-4%) to D...Jump to post
I won't be surprised if CX starts SEA. However, how do you get April 1? Is there some indication somewhere that CX is going to start SEA on 4/1 next year? Earlier in the thread I said SEA would be an April fools joke, the first SEA-HKG flight CX857 (1/3/5/7) will start April 1. First HKG-SEA willl ...Jump to post
Cathay777300ER wrote:I think it's unlikely to be Miami as the CX adverts on facebook for Washington DC mention that it's going to be their longest flight.
Will not be MIA. The city doesn't have a non-stop to even Japan. Moreover, MIA-HKG is more than 800km further than even SFO-SIN, and out of range from A359. I'm thinking IAH or SEA, more likely IAH. MIA is not out of range for the 359. SFO-SIN is actually a longer flight time than MIA-HKG. The SFO-...Jump to post
Quoting BoeingGuy (Reply # 8), " . . . Airbus has Flex (Assumed Temperature) thrust reductions. Do they also have fixed derates?" BoeingGuy, I have seen previously from reading another thread that on the Airbus narrowbody series (A319/A320/A321) with CFM56-5A5, CFM56-5-A1 and A3, and CFM5...Jump to post
Local paper was saying both plots fired from Air China.
“Co-pilot was smoking a e-cigarette without the Captain knowing” (I don’t believe)
Wanted to turn the fans off, turn something else off instead next to it.
CAAC will investigate, possibly loss of licence and other penalties.
The A320 and A330/A340 RLI have expired and been fully repaid.
Significant detauls of RLI can be found in the various WTO submissions (it would take weeks to go through). It is not the topic of this thread.
The false claim that not a dime of A380 development costs has been paid has been shown to be clearly false. A dime is a very low bar of proof required.
First, do we know that Airbus includes RLI as production cost in its accounting? As others have pointed out, RLI is a liability that exists whether it's paid from royalties or not. A past liability that is independent of production shouldn't be counted as a production cost. That it's paid simultane...Jump to post
And sure Airbus will be making money on aftermarket services, but I doubt that the profits on that part of the business will be enough to get the program to break even if Airbus would have used program accounting. Airbus already makes more per year in after market support for its aircraft than it s...Jump to post
Matt6461 isn't talking about the state support for the A380. The RLI payments are actually adding to the overall program losses for Airbus. It's just another cost that they cannot book as profit. That is not what he said, he said it has not paid back any development costs which is clearly incorrect...Jump to post
Matt6461 wrote:It has never repaid and probably will never repay a dime of its development cost.
https://leehamnews.com/2018/06/18/vla-era-is-over-are-777x-a350-1000-too-large/ Story is behind a paywall; this isn't one of my catch-up on Leeham premium months, but the broad argument is in the summary. I don't disagree that VLA's aren't selling well, obviously. The 748i and A388 are terrible pro...Jump to post
Yes, but also, these airports tend to be in places where strong crosswinds are relatively uncommon. LAX’s “odd” winds are Santa Ana winds, almost straight down the 6s and 7s. That is not(knot) the real reason, above 40 kts you run into issues with opening doors and the safety of ramp staff. A lot o...Jump to post
The big girls and boys flying their aircraft in and out of those locations obviously know how to use a crosswind technique.Jump to post
It is obvious, the aircraft was struck by lightning multiple times, these areas were discovered during the transit requiring further maintenance.
In the current MEX airport the A359 can take off at 250 Tons (to be increased to ~260 Tons when the new MEX opens). The OEW of the A359 should be around 145 Tons, 348 passengers translates to 33 Tons, leaving 72 tons for fuel that in a very rough estimate should amount to a range of 5,600 NM. MEX-M...Jump to post
HKG would have to be one of the most competitive hubs in the world with over 100 airlines. An airline like DL has proven time and again it cannot compete, they usually blame everyone else for their problems, be it the government taxing them too much to foreign airline subsidy. In reality DL has a lo...Jump to post
The four “issues” I am aware of with A350s lavatories are the mirror cracking due to normal fuselage movement, soap dispenser not working, the indicator outside the door not going from green to red to show it is in use, and the light not coming on when the door is locked. Typical minor quirks with a...Jump to post
There are numerous flights both daily and weekly that use the Polar Route Structure for their flight plans. Not all pass directly over the pole but within 200NM or less. This subject has been discussed before on ANet so you might want to do search to expand your knowledge base. Much closer than tha...Jump to post
There are numerous flights both daily and weekly that use the Polar Route Structure for their flight plans. Not all pass directly over the pole but within 200NM or less. This subject has been discussed before on ANet so you might want to do search to expand your knowledge base. The closest waypoint...Jump to post
Whoever in Airbus marketing came to that strange "4 times less noise", he will have based that on an input from somewhere expressed in dB or rather dB(A). And he found a difference in dB that he tried to translate into "real world numbers", but he did that very, well at least mi...Jump to post
That is not the point! You made a completely wrong calculation that turned a factor 4 of something into a 0.6 dB difference. That is complete nonsense, and you seem still not to understand why. Therefore I will ignore the rest of your post, it is based on wrong assumptions. And that has nothing to ...Jump to post
we were practicing some troubleshooting procedure , where its says do ground scanning and refered some reference. What does this ground scanning means? On the Airbus using the CFDS ground scanning tests various systems and computers, it is like providing the system/computer with known fake inputs v...Jump to post
I can look wherever I want, the difference between 55 dB and 55.6 dB is nowhere even close to 4 times of anything related to noise. They said it is quieter !!! You need to take your engineers hat off and understand the “up to” numbers probably have nothing to do with the underlying physics and ever...Jump to post
masi1157 wrote:No! That one is not a possible interpretation, it is just wrong.
You know the definition of sound pressure level? Sure, I understand the difference between acoustic power, sound intensity, and sound pressure. Sound pressure level is the sounds pressure referenced normally to 2x10^-5 N/m^2, the nominal sensitivity of the human ear at 1000 Hz (but purists say it s...Jump to post
So when an Airbus expert on cabin noise tells you that "up to 4 times less noise" is a pretty meaningless statement, you still don't care? No, I know they would have measured it to come up with the statement, but would a human actually be able to tell the difference, doubtful. Much like t...Jump to post
zeke: When it comes to piloting, I listen to what you say, knowing that you're a professional pilot. I know that I can learn from your insight. As far as I know, cabin noise is masi1157's profession, so maybe you can lean something from him...? (Looking at your decibel calculations, I'm pretty sure...Jump to post
A factor 4 in sound pressure would mean a 12 dB difference. A factor 4 in sound power (resp. sound intensity or, in a reverberant field like an aircraft cabin, sound energy density) means 6 dB. A factor 4 in noise perception (by humans) would require almost 20 dB. I am afraid somebody mistook a 6 d...Jump to post
lol yes... I was wondering what that could mean - I was thinking maybe "4 times less" could mean -12 dB, but it's just weird. Maybe it's a bad translation from French, and they meant to say that there is less noise in the cabin up to 4 times during a flight. (At the gate, during taxiing, ...Jump to post
hotelmode wrote:The 380 will be a lot higher a lot earlier than the 777. This could totally change the best routing. You'll see the same even within the same airline where the type is different.
Worldwide PBCS would be the largest improvement to safety and economy as per the OP question.
https://www.icao.int/airnavigation/pbcs ... ault.aspx/
No - the length of the runway is not the issue here. Long runways end up hitting tire speed limits, so a super long runway is not going to make a big difference. The A359 is limited to around 250 tonnes out of MEX, and that is due to second segment requirements. It is a long way off being tyre spee...Jump to post
The A30N has been on a diet. As such, one area weight was removed was the A340 structure that remained as the wing was dual-purpose. This area was used to mount the refuelling pods as the A330 doesn't have outboard engines or the 'plastrons' that the A340 needed. The points were readymade reinforce...Jump to post
Well Ramadan is a reason why carriers in the region park aircraft every year. And it is also undisputed that the State of Qatar does not have a lot of regional friends at the moment. So they are replacing 3 regional aircraft with 3 long haul aircraft. Doesn’t that point more to them looking at diffe...Jump to post
I think the point he was making is there is an overcapacity in the ME. Etihad, Emirates, and Saudi have all grounded aircraft, I would be surprised if Qatar did not. How much of it is due to the normally yearly Ramadan slow down is yet to be seen. Plus the A332F is mainly used for regional routes, a...Jump to post
Nice post, but I do not agree with the comment it is performance alone that seals the deal, for us it’s a nett present value assessment so performance, maintenance, financing etc come into play to determine lifespan costs. If the engine misses its mark the manufacturer will offer a deal, the airfram...Jump to post
Isn't the range delta from higher MTOW extra fuel determined by the fuel flow at the beginning of the flight? ( You add range at the front so to speak and not at the back :-) No, should be the fuel flow at the point plus the cost of fuel (or payload) to carry that fuel (or payload) that distance to...Jump to post
The 35K is ahead of the 777X for that for obvious reasons; and will get some orders after it enters commercial service for companies who were waiting for that point and to see some actual real world performance data. Yes it will help the 35K that its performance numbers are better than projected. B...Jump to post