The very first A380 to be scrapped has an estimated airframe value of $45 million, and the power plants should be worth another $24 million. The owner of this 11 year old plane expect to see a small but positive return on investment when all is said and done. Having a positive return after scrappin...Jump to post
The very first A380 to be scrapped has an estimated airframe value of $45 million, and the power plants should be worth another $24 million. The owner of this 11 year old plane expect to see a small but positive return on investment when all is said and done. Having a positive return after scrapping...Jump to post
Unducted fan ...
The marketing name for propellers with lots of blades.
Does anyone know what the fuel energy ratio Efficiency is on the jet engine with the best fuel economy is ? Looks like about 71-72 percent propulsive efficiency, 39-40 percent overall efficiency for the Airbus 350 and Boeing 787. https://www.nap.edu/openbook/23490/xhtml/images/p-51-1.jpg There are ...Jump to post
Would it be more economical for an airline to operate 1 single A380 or 3 738's for a flight that is around 4 hours long? The operating costs per hour are more for the A380 but I still think it is more efficient than sending 3 738's, just thinking about using 3 gates, 3 slots etc instead of 1. Can a...Jump to post
Too far west to be east-west hub, too far south to be western north-south hub and disconnected from the eastern half of the country. Simple look at a map tells. AW built PHX because it was based there. GF SEA-SFO-NYC 3250 miles SEA-LAS-NYC 3100 miles SEA-PHX-NYC 3260 miles SEA-SLC-NYC 2691 miles LA...Jump to post
On the other hand, full exemptions from compliance apply to aircraft certified for cargo only, aircraft below a certain MTOW, aircraft that use fuel systems that demonstrate an equivalent or greater level of safety by other means (such as the A380) What???? Now I'm curious. What does the A380 do?Jump to post
The recovery package will be finalized in 10 to 15 days. I'm very interested in what reforms will reduce the losses: https://www.moneycontrol.com/news/india/govt-to-finalise-air-india-revival-package-in-10-15-days-says-civil-aviation-secy-r-n-choubey-3014581.html/amp Is there any reason to assume t...Jump to post
UA makes orders for airplanes it can finance, to operate where it has the demand. This is in contrast to massive, costly orders which end up as albatrosses when the economy turns south and the company doesn't have enough profitable flying to deploy them and generate a ROI. Gigantic 747/777 orders i...Jump to post
No, this is how co operates. UA didn't order piecemeal, instead they made large order announcements. UA makes orders for airplanes it can finance, to operate where it has the demand. This is in contrast to massive, costly orders which end up as albatrosses when the economy turns south and the compa...Jump to post
Thank you for opening the subject keesje. I considered opening the subject myself for the last 5 month, but felt too lazy about it. I also see a great potential for the ACJ321LR (especially for smaller governments in Africa/Asia), but so far it's very quiet from Airbus. I have a feeling the ACJ321L...Jump to post
In 2013 there was ONE A321ACJ delivered. https://gama.aero/facts-and-statistics/statistical-databook-and-industry-outlook/ So would the do one? :yes: But whomever is writing that big a check would want the A330ACJ... Did I read right, zero ACJ delivered in 2017? :faint: Neither Boeing or Airbus sel...Jump to post
"LHT develops automated steam cleaner for engine heat exchangers".
https://www.flightglobal.com/news/artic ... at-452131/
But what is a a jet engine heat exchanger, and what does it do?
Just wondering if anyone would know how much more efficient can a jet engine get compared to the cutting edge jet engines out there now on commercial airliners Does anyone know what the fuel energy ratio Efficiency is on the jet engine with the best fuel economy is ? Does anyone know what the next ...Jump to post
Dalmd88 wrote:tomaheath wrote:Parton my ignorance but don’t a lot of the airframe parts and engines need paperwork for last maintenance and hours flown?
Any structural part that has been drilled, will not be able to be reused on another plane.
Hi I am looking for an economical 6 seat or high useful load 4 seat aircraft after full tanks. Something not more 150k CAD but up to 200k CAD is fine but not preferred. Also just single engine aircraft. It's mission will be cross country recreation and carrying camping supplies also I live in a mou...Jump to post
> The Hondajet is an example of over the wing. No other business jet does this. The Scaled Composites Triumph also had an over-the-wing engine installation. It was also the first airplane to fly with FJ44 engines. I did the aero design of the nacelle installation and will say that it wasn't easy. 1...Jump to post
Most older business jets have engines maintained by their owners. But newer business jets are often on power-by-the-hour. A clear example is this: older Citations powered by Pratt engines are normally owner maintained, but newer Citations powered by Williams are almost always power by the hour. Only...Jump to post
BTW ignoring all the other arguments for wing mounted engines, mounting well behind the center of gravity, e.g. MD-80, is just fine, as long as you also move the center of lift back. Which is why the MD-80 wings are mounted relatively much further back compared to, say, the 737 wings. 2090945,43842...Jump to post
Hei all, This is maybe a noob question for many of you but I am not an engineers.... and I failed to find the reply by research function. The engine are normallly located near the centre or gravity due to structural reason + (if I am not wrong) it's easier for fuel intake system and some how better...Jump to post
Singapore’s sovereign wealth fund has expressed interest in buying General Electric Co.’s plane-leasing unit, said people with knowledge of the matter. At a meeting between GIC Pte. and GE officials, fund executives asked whether the Boston-based company would consider selling all or a part of GE C...Jump to post
Have their ever been any computer control system failures so bad they had to go to alternate law or direct law in the modern jet age? I know about the DC-10 (United 232) that had hydraulic control system failure, and about 737 rudder issues. That's not what I'm asking. I'm asking about failures of h...Jump to post
1200 meters if fine for small propeller aircraft with a reasonable pilot on a reasonable day. I've never heard of an airliner operating into a 1200 meter runway. Maybe someone does somewhere, but it's quite rare.Jump to post
I think everything you wrote is true for non-fly-by-wire aircraft. But in the fly-by-wire world, one can counter undesired rolling moments from a slideslip using programmed movement of the ailerons. The human need never know anything is going on. A different poster suggested that flyability conside...Jump to post
I have been assuming that the anhedral of high wing aircraft is due to gravity. In flight, due to lift, the wings are level. With low wing aircraft this is not possible due to ground clearance. Is that assumption far from reality? That is not at all the reason for anhedral and dihedral. The wings o...Jump to post
Or you can have the great F4 with dihedral on the wing and anhedral on the horizontal stabilizer I That was done to keep the tail out of the wake of the main wing at various angles of attack. It's a reasonable reason to have andedral for some planes. Other planes just use a T-tail, or other arragme...Jump to post
The normal reason to have anhedral angle is for better stability Are you sure? Acc. Wiki dihedral would be much more stable. So anhedral on high mounted aircraft is done for increasing maneuverability. You're right. I was trying to be too cute with my words. By "better" I means "not ...Jump to post
fr8mech wrote:Just from a practical point-of-view, the aircraft you mention are military cargo aircraft. The high-wing is a result of the necessity to keep the fuselage as close to the ground to facilitate rapid load/unload.
The loss of lift isn't very large ... There are two sources of inefficiency. (1) The wing lift vector is not vertical, which reduces lift and (2) the wing has to weigh more to have the same span. Unless you get some benefit, you wouldn't accept any inefficiency. Aerodynamic designers will kill thei...Jump to post
I notice that most high wing jet aircraft, even ones with fly by wire controls, have significant Anhedral (the wings droop), Look at a C-5, a C-17, and AN-124, etc. This causes a slight loss of lift, since the lift vector for each wing is not vertical. The normal reason to have anhedral angle is for...Jump to post
Where are PT-6 built? Could Canada build PT-6s by themselves, or are they dependent on significant imported parts? Can I ask what's the reason for that question? You want to go to war with the USA with a fleet of DHC-6 Twin Otters and thus be independent on part delivery from the South? :lol: Just ...Jump to post
Where are PT-6 built? Could Canada build PT-6s by themselves, or are they dependent on significant imported parts? Pratt and Whitney Canada builds the PT6 series many parts are built by american companies though . It could be built solely in Canada but it's under a US Patent and thus could also be ...Jump to post
I think what would help me most is if people made an explicit prediction what they think will happen. Not what they think ought to happen, but what they think will happen.
I always find that kind of thing clarifying.
If humanity is to progress, certain mindsets must be eradicated using peaceful methods, one of which are economic sanctions. Iran is not compatible with the Western world and ideas of equality seem abstract to its citizens regardless of the social ladder. I hope the US will impose similar sanctions...Jump to post
Great news. Shows sanctions are working. The west must continue to apply severe pressure to force the theocratic government to its knees and usher in the great Persian country that is modern and secular. Well said. However I don't understand why POTUS allows European carriers to operate to Iran. He...Jump to post
This is way too vague to take anything from, without going to OAG for more research. E.g. what does "LA to San Francisco" even mean? LAX-SFO only? Or BUR/SNA/ONT/LGB-OAK/SJC count too? Also, from the look of it, this seems to be a measure of frequency instead of capacity. It is by frequen...Jump to post
World's busiest air routes, 2017. 1. Jeju to Seoul 2. Melbourne to Sydney 3. Mumbai to Delhi 4. Fukuoka to Tokyo 5. Rio de Janeiro to Sao Paulo 6. Sapporo to Tokyo 7. LA to San Francisco 8. Brisbane to Sydney 9. Cape Town to Johannesburg 10. Beijing to Shanghai https://twitter.com/spectatorindex/sta...Jump to post
Flightradar24 lists the registration of the aircraft that will be used on flights a few days from now for some airlines in NA and Europe. I believe this is one of the most powerful features of FR24, and regardless of how accurate it is (sometimes it's not, based on experience), it is a great featur...Jump to post
Nippon Cargo Airlines on 17 August submitted plans to Japan’s Ministry of Land, Infrastructure, Transportation and Tourism (MLIT) that centers around consolidating the fleet and maintenance operations to a single platform based on the 747-8F. The detailed improvement plan was in response to a manda...Jump to post
Precisely. BA have them for 6 more years. I’d imagine LHs stay around for a while too among others. It would be interesting to know where the last -400 will fly. With the way oil prices have gone in the last year or so BA and LH could well accelerate retirements. I can’t comment on other airlines b...Jump to post
Excluding service dogs (seeing eye dogs, rescue dogs, police/fire), everything should be a pet and charge $100 Lightsaber Are used to think that too. When I asked the guy in front of me at the hockey games why he brings his dog to a hockey game. His wife explained that he used to get angry all the ...Jump to post
Air India is not going to just magically disappear! Not without significant "structural damage" that will make demonetisation look like a walk in the park. Air India's work force is about 1/70,000th that of the Indian workforce. Air India is about 1/700th of the total economy of India by ...Jump to post
Prediction: The Indian government within the month will announce a plan to “revitalize” and “restore” Air India. It’s two main components will be a large pile of cash and a large pile of words. No real reforms will actually happen (but lots of words will be used). Air India will not be privatized b...Jump to post
Prediction: The Indian government within the month will announce a plan to “revitalize” and “restore” Air India. It’s two main components will be a large pile of cash and a large pile of words. No real reforms will actually happen (but lots of words will be used). Air India will not be privatized be...Jump to post
@lightsaber I said $8B six days back in #616. The point you are missing is all debt is not equal. AV : WC is 50:50, so $4B:$4B 1) AV debt revenue generating frames @LIBOR + 0.25 - $3,4 Billion 2) AV debt non-rev frames @LIBOR + 0.25 - $600 Million 3) WC debt external commercial borrowing @5-8% ($1 ...Jump to post
But it's just not the same plane. It's a 50% bigger plane with (probably) very few common parts. EDIT: even the different wing you'd mentioned previously is almost no different. It's just the standard wing of the 300 with a ~0.5 m plug at each wing root to move the engines outboard and increase the...Jump to post
Did you know that the Q400 is about 50% bigger than the Q300. It does not share wings, fuselages, or engines. Really a different thing. The wing is very similar and developed directly from that of the 300, the fuselage is in essence just a stretch, and the engines are generally based on the same PW...Jump to post
When it comes to atmospheric flight (not space flight) you have to have at least a unity of exhaust gas velocity if you want to travel at that speed and even then that's not a guarantee. So if the bypass air is moving at 550mph and the core air is moving at 700mph you could theoretically end up som...Jump to post