Daniele Procida
  • Member for 5 years, 10 months
  • Last seen more than a week ago
How close can planes fly to each other over the ocean?
71 votes

This is an excellent question, and helps illuminate several important aspects of the way perception works in aviation. But first... Any near-miss or other air-proximity incident would have been ...

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Are German, Japanese, and Chinese companies not able to build aircraft jet engines on their own?
48 votes

This is an interesting question, but I also think it's the wrong question. Firstly, even despite the tight and complex relationships between governments and aerospace companies, it's not nations that ...

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Why have none of the US /UK/Japanese airlines ordered the Irkut MC-21 yet?
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47 votes

Ordering an aircraft is a very complex business, and implicates a number of matters that don't actually (on the surface, anyway) have anything to do with the aircraft itself. Consider this from the ...

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Why are airplanes described as the safest method of transportation?
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44 votes

Good news The good news is: you really are safe in an airliner, so safe that you could spend every minute of every day of the the rest of your life flying in one, and still not face any greater ...

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How could the Helios 522 passengers have survived so long without oxygen?
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37 votes

Consciousness requires quite a bit more oxygen than merely being alive. Human beings can last remarkably long with very little oxygen, but not remain conscious. And lack of oxygen will soon enough ...

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Why didn’t Boeing ramp 737NG production back up in response to the 737 MAX groundings?
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29 votes

There are several reasons why. First, it takes an awfully long time to make that kind of switch. While one can switch an assembly line for a product, that works rather differently for (say) ...

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Why were the first airplanes "backwards"?
27 votes

I am not sure you are correct that most early planes placed the elevator at the front. For example, Otto Lilienthal's gliders had the tail at the rear. The Wright brothers were strongly influenced by ...

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Could airliners use a steam or electric powered catapult for take-off?
24 votes

It would be possible from an engineering point of view to design some sort of ground-assisted take-off launch mechanism for airliners, even though any of the benefits you describe would be greatly ...

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Why don't short runways use ramps for takeoff?
23 votes

This is a smart but unfortunately not very good idea. It seems quite reasonable to use a ramp at the end of a runway to help launch a plane into the air, and matches everyday experience when we are ...

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Why are airplanes sometimes led by a vehicle?
22 votes

"Follow-me cars", as they are known, make it easier for pilots to get to the correct spot by the correct route. This could be the runway before take-off, or the final stand after landing. They're ...

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Why are there no commercial supersonic flights at present?
22 votes

There are numerous reasons. They are not all economic ones by the way, even if most of them are. First, you must build your supersonic airliner Neither of the two supersonic airliners that once flew ...

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How exactly should I understand the term "accidental hull loss"?
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22 votes

Both the MetroJet and GermanWings incidents were deliberate acts of destruction, not accidents in any common understanding of the word, or indeed in the sense defined by the Convention on ...

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Would mechanical indicators have helped in the Air France 447 incident?
19 votes

Unfortunately, if there had been a jazz band in the cockpit singing "The plane is stalling" it wouldn't have helped. If Moses had been in there carrying a stone tablet newly-carved by God himself ...

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Do airplanes dump fuel before landing?
19 votes

I assume we're speaking of commercial air services such as airliners. Generally, landing with less fuel is better than with more It's better for an aircraft to land with less rather than more fuel. ...

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Is this one of the engines from the 9/11 aircraft?
18 votes

Unlike many of the others who have responded here, I have relatively little expertise in identifying motors and wouldn't be able to distinguish a pump motor from a high-torque lift motor at a glance. ...

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Would a slower speed and lower altitude reduce fatal incidents?
17 votes

Other answers have explained why height is a good thing. I don't want to elaborate on that, but to focus on one aspect of the question's reasoning. It's implicit in the question that a falling object ...

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Why are the AOA sensors placed outside the aircraft?
14 votes

No, it is not possible to place the sensors inside the aircraft, because the angle-of attack sensors need exposure to the surrounding air, in order to measure, as you mention yourself, "relative ...

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Does the power behind the engine make any difference to how strong the thrust is?
12 votes

You ask: If the engine can spin the propeller fast enough, why does it need power behind it? Good question. However, the answer is in the if of your question. A propellor does work - it pulls (...

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Is it feasible to recuperate energy from landing aircraft by using a runway sled with regenerative braking?
Accepted answer
11 votes

What you propose might be technically possible, but that doesn't make it a good idea. However, any benefits would by tiny compared to the immense cost, the extraordinary engineering efforts required, ...

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Is it normal for a Boeing 757 engine to bounce under its fairing?
Accepted answer
10 votes

Yes, it's normal. You will see engines bounce, yaw and shake, sometimes with apparently alarming ferocity, and you might wonder whether something is going to shake itself apart. However, the fact is ...

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Which country started the tradition of naming aircraft?
10 votes

I think the answer has to be that it has always been a tradition. Since time immemorial - in the most ancient of mythologies and legends, across a very wide range of cultures (in fact I'm not aware ...

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What exactly does it mean, that plane has diverted due to the needs of a passenger?
10 votes

The transportation industry tends to use specific phrases to describe events of this kind. They are not just euphemisms, but are intended to neutralise the potential for drama, speculation, voyeurism ...

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Do flight schools typically have dress codes or expectations?
9 votes

Expectations Learning to fly is not cheap, and you are likely (depending where you are studying of course) in a minority, if you are there as a hobbyist, because I would expect that most of the other ...

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What prevents Low Cost Carriers (LCCs) from cutting cost that compromise safety?
9 votes

There are two main factors. The law One, as other answers have mentioned, is the law. There are strict regulations that cover everything in aviation, from the way people speak to the training they ...

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Would the twin engine Boeing Y3 be able to compete better than the Airbus A380?
Accepted answer
8 votes

The answer is quite simply, no, at least, not if it is or was intended to compete as an airliner of roughly the same size. That's because your question is based on a false premise, that the struggles ...

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Which simulator is appropriate to learn the minimum to land an airliner?
Accepted answer
8 votes

The simple answer is: none. Flying an airliner (never mind the difficulties of getting into a locked cockpit) is not just a matter of wrestling with some controls. And, unfortunately, you would ...

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Can the removal of a duty-free sales trolley result in a measurable reduction in emissions?
7 votes

I paid for a flight Amsterdam to Accra this afternoon. I selected the option to "Benefit from CO2-neutral travel". fly CO2 neutral Contribute directly to reforestation and conservation of ...

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Is it really cost effective to put a motion system underneath a Full Flight Simulator?
7 votes

The fact that this is how flight simulators are built gives you the answer: yes, it is cost-effective. It doesn't matter what the cost is, since they are built like that, the cost must be worth it. ...

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Why do countries not bound by US law comply with the FAA's originate airworthiness directives?
5 votes

In the case of well-funded, highly-respected agencies such as the FAA and EASA, it makes a lot of sense for other agencies to follow their lead especially when it comes to acting on the side of ...

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Can I use PVC pipes for the rib on the wings of my homemade airplane?
5 votes

Yes, of course you can. However, it's probably not a very good idea. PVC pipes are pretty strong and light; circular-section PVC pipes have an excellent strength-to-weight ratio. Being strong and ...

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