Questions tagged [aircraft-development]

Development of an aircraft from an On-Paper design to its final stage as a flyable plane is called Aircraft Development.

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4
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1answer
198 views

Is it coincidence that the B-2 and YB-49 flying wings have exactly the same wingspan?

Development of the Northrop Grumman B-2 Spirit began as far back as 1979; however, this was nearly thirty years after the last flight of Northrop's earlier flying wing the YB-49. There aren't many ...
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3answers
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Was a six-engine 747 ever seriously considered by Boeing?

The Boeing 747 can carry a fifth engine on the side. As the airframe looks quite symmetric, I think that it would not be big work to hang a sixth engine on the side as well. From here, we seem to be ...
7
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1answer
159 views

When were checkerboard fiducial markers first used in aircraft development?

It's common to put checkerboard fiducial markers on aircraft to help analyze rates and orientations from photographs and film. When was this practice first used on aircraft? Flight test versions ...
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2answers
302 views

How come Boeing invested \$32 billion on the 787 program and Airbus only \$15 billion on the A350?

How come Boeing invested \$32 billion on the 787 program and Airbus only \$15 billion on the A350? (according to wikipedia)
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2answers
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Where can i find aircraft blueprints for study purpose? [closed]

I'm a 3D artist and i want to start my new project. I'm going to create an exact model of the Embraer 190 aircraft. I need this for my graduation project at the university (I chose such a project, ...
2
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1answer
302 views

Could simple fly-by-wire controls be installed in a prototype as quickly as a mechanical system with an autopilot?

It seems that fly-by-wire systems can take longer to get certified as the testing requirements are much more extensive. A prototype aircraft wouldn't have to pass these tests. How much more time or ...
0
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2answers
259 views

Why manufacturers does not producing variable sweep wing in our current scenario? [duplicate]

I read about many types of aircraft wing configurations like rectangular, swept forward, swept backword, and Delta wing. These configurations have their own advantages and disadvantages. But why we ...
4
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1answer
326 views

What does Lockheed have to do to mark the end of the F-35's SDD?

What does Lockheed Martin have to do to mark the end, or close out, the System Development and Demonstration phase of the F-35?
6
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2answers
556 views

If maximum speed was a priority for modern military fighter jets and bombers, approximately how fast would they likely be?

Burt Rutan talks rather passionately about the lack of innovation in space flight, but also mentions how fighter jet (maximum) speed performance has stalled: In fact,...
7
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3answers
469 views

How does one develop artificial stabilization for aircraft uncontrollable without it?

In an answer about the F-117 Peter Kämpf writes F-117 (...) is unstable and uncontrollable without artificial stabilization. I wonder how such an aircraft comes to existence, specifically how one ...
5
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2answers
1k views

How much does it cost to design a jetliner's wing?

The cost of designing a brand new wing for a jetliner, compared to modifying an existing one—with or without the changes to the production line—how is it estimated? Related questions (bonus): Are ...
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0answers
210 views

Does the C series from Bombardier incorporate composite materials into the fuselage and/or wings?

Does the C series from Bombardier incorporate composite materials into the fuselage and/or wings? If so, what material is used, and where is it applied. Because of Airbus's 50% market share in the ...
106
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13answers
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Why does it take so long to develop modern military jets?

In the 1960's, it took three years to produce a flying prototype of an aircraft that flew faster than anything before, was built out of a novel construction material, used a new type of fuel, and was ...
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0answers
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What limits the size of the aircraft? [duplicate]

Why is it so hard to make large aircrafts? Boeing stopped after the 747. They haven't made a larger plane ever since. Airbus A380 took a long time for it to be designed. In June 1994, Airbus ...
0
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1answer
76 views

Besides size, what determines the cost of creating a composite structure for a single engine piston aircraft? [closed]

When designing an aircraft (LSA or GA), how would one minimize the cost of construction when the aircraft is composite. To be clear, I am talking only about the structural components, not the interior,...
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1answer
713 views

What's the point of the Total In-Flight Simulator?

Picture of the contraption: Source: wikimedia.org After a quick research, and Simon's link, it turns out to be a simulator for how different aircraft would handle. And was useful is simulating ...
8
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1answer
906 views

Why did it take so long for helicopters to be developed/in use?

The Sikorsky_H-5 was made in 1943 but used an engine released in the 1930's. It seems to me that the used that applied to helicopters, specifically in warfare, could have applied much earlier. Things ...
2
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1answer
345 views

Does RTCA/DO-254 apply to power electronics?

DO-254 provides guidance for the development of airborne electronic hardware and it is recognized by the FAA in 2005 via AC 20-152 as a means of compliance for the design of complex electronic ...
4
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1answer
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What do aircraft designers like Burt Rutan do to cheaply practice geting good at designing aircraft? [closed]

I am a new aircraft designer, and work for a small company (which doesn't have the enormous resources of a Boeing or Lockheed) so we have to work with limited resources to get good at our trade. I've ...
3
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1answer
303 views

How are $V_r$ and $V_2$ determined?

$V_r$ is the speed at pilot should initiate rotation on take-off and $V_2$ is the safe climb-out speed. Pilots determine them for each take-off by looking them up in a table in POH or QRH or somewhere....
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3answers
5k views

How are composite materials on aircraft joined?

Answer for the question Why are planes using rivets & not welded construction? describes why rivets are preferred for joining aluminium alloy components. But how are carbon-fibre-reinforced ...
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7answers
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Why are planes using rivets & not welded construction?

I was motivated to ask by this question: Why are airplanes riveted and not screwed? Why not welded construction? Is welding these alloys too difficult? I come from a refining background & in a ...
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2answers
3k views

How are forces on the landing gear reduced or compensated for at touchdown?

When an aircraft lands with the tires of the landing gear at rest, as soon as the the aircraft touches down, the landing gear experiences a large amount of wheel-spin up forces (because of the static ...
2
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1answer
479 views

What tests are done on aircraft wings for testing the effects of lightning? [duplicate]

During the testing phase of aircraft wings, there are lot of testing like temperature, pressure, humidity, vibration and load/stress. Apart from these, does any one have idea which other tests are ...