Questions tagged [aerospace-materials]

Asp materials are materials, frequently metal alloys, that have either been developed for, or have come to prominence through, their use for aerospace purposes.

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Why are Li-ion batteries not being used in aircraft but are widely used in electric vehicle industry?

This might seem a very naïve question. Maybe the comparison of electric vehicle to aircraft is hugely inappropriate. But I couldn't find a clear answer in web search. Lithium-ion batteries have a high ...
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1 vote
2 answers
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Why are liquids for cooling not allowed when drilling on CFRP/Al or CFRP/Ti stacks for aeroplane wings?

I recently did some research on the effect of cooling on CFRP/Al7075 drilling. 7075 is used for aeroplane main wing upper skin, and the plates need to be overlayed and drilled for flush riveting. But ...
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7 votes
1 answer
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What are all the composites used in the making of fighter jets? What is the green and yellow material on the aircraft in the pictures below? [closed]

Below given are images of various fighter jet manufacturing.
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0 votes
1 answer
140 views

Which parts of an airplane are made of buoyant material?

Which parts of an airplane (to make this question more specific: accessible in the main fuselage where the passengers are aboard) are made of buoyant material. Imagine a plane is about to crash into ...
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2 votes
3 answers
222 views

Can control surfaces for slow aircraft be 3D printed?

Can control surfaces for slow aircraft be 3D printed or even just printed as a core and then wrapped in fibreglass or carbon fibre? I understand that 3D printing of wings, etc. is pretty common in the ...
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-1 votes
2 answers
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Why doesn't a hot jet engine crack at 10,000 metres and -50 C air temperature?

I have seen videos of red hot jet engines being tested at sea level in a building. But even in a building the temperature difference between the engine and the room is large. Most materials would ...
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7 votes
1 answer
1k views

Could an F-35 really be 3% rare-earth?

The Financial Times' China targets rare earth export curbs to hobble US defence industry states: Fighter jets such as the F-35, a Lockheed Martin aircraft, rely heavily on rare earths for critical ...
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1 vote
1 answer
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Deicing Rod for Propellers

Similar to a card hitting the spokes of a bicycle, the card is soft enough to knock the dust off the spokes with no damage. What material would be best to impede the propellers to chip off the ice. ...
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13 votes
1 answer
2k views

Was wood used in the construction of the TU-144?

This image the Yegoryevsk crash of the TU-144 CCCP-77111 appears to show a part of the wreck made of wood: (picture source) The inside looks like wood slats with rafters. Wood is sometimes used in ...
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2 votes
2 answers
421 views

Materials usually used in dorsals fins specifically in the ATR 72

I am an aerospace engineering student and I am having problems finding information about the materials usually used in the dorsal fin of an aircraft. I would also like to know the kind of stress and ...
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3 votes
2 answers
209 views

How to know the material of key-top?

Posted it here originally. There are keys (push buttons) on the front panel of an avionics device that fits inside the aircraft cockpit. I need to know the material of which those key-tops are made ...
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2 votes
1 answer
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What is the most recent turbofan engine that used steel for its bypass fan blades?

I haven't been able to locate any engines that use steel for the bypass fan. All sources suggest Ti and composites are used for blade construction. Apart from the weight steel could partially make up ...
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3 votes
4 answers
465 views

Why did wings start to be made with aluminium skin instead of fabric?

Why did engineers start designing planes with aluminium skin on the wings instead of fabric covering? While the force of lift acts on the skin, to my knowledge it is not subject to high stresses
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5 votes
1 answer
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What material is the B737 wing skin made out of?

What material is the B737 wing skin made out of? I actually couldn't find much information on the wing skin upper and lower panel materials for the B737, the general guess is of course aluminium, but ...
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2 votes
2 answers
101 views

Can UHMWP be used as composites for aircraft impact susceptible areas?

Can Ultra High Molecular Weight Polyethylene (UHMWP), be used as composites for aircrafts impact susceptible areas? I did some research but could only see UHMWP being used as a hybrid with graphite/ ...
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2 votes
0 answers
99 views

Which connector and cables are recommended for CAN?

Which mechanical connector(s) and cable(s) is/are recommended to arrange a Controller Area Network (CAN) bus communication or its aerospace counterpart ARINC 826 in the aerospace industry (civil & ...
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3 votes
2 answers
200 views

Why don't the noses have the same de-icing metal surface like that of the wing's leading edge, engines, tail, etc.?

For reference, let's take the A320. The nose is painted like the rest of the body. Image Source
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2 answers
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Why do we use composite aluminium or titanium stacks in airplanes? [closed]

Why do we use composite aluminium or titanium stacks in airplanes? What are their machining conditions?
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1 vote
2 answers
286 views

Why is there such a low level of automation in the aerospace industry (compared to other industries such as automobile)?

I have been watching some episodes of the documentaries made by National Geographic lately and I have noticed something that I can't find an explanation for. In this episode of Megafactories - ...
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10 votes
1 answer
479 views

Did the Phantom F-4 contain "polychron" or other synthetic materials as a replacement for rubber circa 1969?

update: In order to make it easier to answer this question, use of "synthetic materials as a replacement for rubber circa 1969" in any aircraft might be good enough. Michael Crichton's 1969 ...
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19 votes
2 answers
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How strong is aircraft-grade spruce?

I have been trying to find some real numbers on how strong a single solid piece of aircraft graded spruce wood timber is, but haven't had much luck and the numbers that I have found so far were either ...
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6 votes
1 answer
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What is the material of snubber brakes?

What is the material of snubber brakes that is used for stopping the spin of the nose landing gear? KC-135, Boeing 747, 727 are the aircraft that I saw with these snubbers.
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8 votes
8 answers
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Why don't they build airplanes from 3D printer plastic?

I'm not an expert in this field. My assumption is that there are plastics lighter and stronger than the materials used to build planes. So that would make plane lighter and thus would consume less ...
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4 votes
1 answer
1k views

Are turbine and compressor blades and vanes cast or forged?

I was wondering how blades and vanes are typically made in commercial jet engines. Would you typically use investment casting to make compressor blades or just in the turbine section to accommodate ...
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1 vote
1 answer
261 views

What materials are used in a Rolls-Royce RB211-524 Engine?

I am trying to know what materials (Specifically metals) are used in making a Rolls-Royce RB211-524 Engine. I already found what is used in engines in general, but is it the same for all? And if so, ...
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2 votes
0 answers
85 views

How do composite aero structures compare against metallic structures in crash resistance?

is there any information available comparing the difference in crash resistance between composite mainly carbon or fiberglass polymers etc vs conventional metallic mainly aluminum aircraft structures.
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2 votes
1 answer
165 views

How is a composite fuselage repaired when structurally damaged?

In case of FOD, a fuselage puncture for example, what is the repair process? Considering time, complexity and cost, how is compared if it was an aluminium fuselage?
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18 votes
3 answers
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Why would a jet engine that runs at temps excess of 2000°C burn when it crashes?

Airline engines are designed to work at very high temperatures. Yet, when a plane crashes they're burnt (see below). Is it something in their design? (bostonherald.com)
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6 votes
3 answers
462 views

Why don't short-haul regional jets go for composites?

We have seen Airbus and Boeing going all the way for composites on their A350 and 787, but when it comes to smaller planes like the Embraer E-jets or the Bombardier C-series, they choose to use ...
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  • 108
4 votes
1 answer
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What material is used to make the interior sidewalls panels, ceiling as well as luggage bins in a commercial aircraft?

What material is use to make the interior sidewalls panels, ceiling as well as luggage bins? All these elements seems to be made of similar material. What is the weight these cabin interior elements ...
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2 votes
2 answers
7k views

What material is used for the skin of a modern fighter jet?

Modern passenger jets/airliners use aluminum 2 to 3 mm thick as their skin, their maximum speed is 900 km/h give or take. Modern fighter jets travel at twice that speed on average. What material is ...
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2 votes
1 answer
162 views

3-D Printed Carbon Fiber UAV Skin

aviation pros! New to the aviation/RC world and would like to ask a serious question about using composites for the skin of a UAV I am developing my first time out. Want to use carbon fiber for a ...
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5 votes
1 answer
786 views

What is the material and font used on the panels of most cockpits?

I am working on a project for one of my aerospace engineering classes and was curious to see if anyone knew what type of material is used to make the panels of a cockpit (preferably a 737) as well as ...
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0 votes
2 answers
234 views

aircraft display Processors

what kind of Processors and GPU are used for Aircraft display ? Is it possible to use single processor to run all three displays (Primary flight display, Navigation display and EICAS)?
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2 votes
2 answers
231 views

Is there a flexible "cloth-like" material that can be used as "skin" for a non-conventional wing?

I am in the very early stages of playing with the idea of an ornithopter derived aircraft. The intention is to be able to scale the resulting aircraft, to passenger (or useful payload) carrying ...
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0 votes
0 answers
55 views

Could a airship be built using vacuum as the lighter-than-air “material”? [duplicate]

Could an airship be built that uses instead of a very light gas a vacuum to keep it floating? Or would the materials needed to keep its volume even without the pressure from the inside always be ...
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1 vote
2 answers
513 views

Is it possible to build a honeycombed vacuum balloon? [closed]

Is it possible to build a vacuum balloon with a near perfect void that can lift heavy objects and doesn't collapse and buckle under the atmosphere? I expect perhaps a honeycombed or lorimerlite ...
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5 votes
1 answer
369 views

How did the windshield technology evolve?

I would really appreciate it if someone could please explain the differences and similarities between the cockpit windows of a Boeing 747-400 and Douglas DC-3. I am just trying to figure out how the ...
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3 votes
2 answers
3k views

Which aluminium alloy is used in the Boeing 747's fuselage?

Which aluminium alloy is used in the Boeing 747's fuselage?
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4 votes
2 answers
990 views

What were the J47's turbine blades made of?

What materials were used to make the General Electric J47 turbine blades in the 1960's?
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10 votes
1 answer
2k views

What components of the Boeing 787 are made out of titanium?

Inspired by the question, Why is the 787 tail cone made out of titanium?, I want to know what other parts of a Boeing 787 are made out of titanium. We now know, the APU exhaust cone is made out of ...
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41 votes
1 answer
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Why is the 787 tail cone made out of titanium?

In this question there is a drawing of a 787 that shows that the tail cone is made of titanium. Why is such a heavy-duty material like titanium required for the tail cone? I do not see how there ...
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4 votes
1 answer
705 views

Which are the main aluminium alloys used in airliner construction?

The proportion of composites used in airliner construction has increased in the last decades, with the B787 and the A350 being the first ones with composites making up the majority of wing and ...
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4 votes
1 answer
507 views

How does the rotor blade material affect aircraft performance?

Helicopter rotor blades in newer helicopter designs are made from composite materials. This results in improved performance. Is this simply because they are lighter or is there another reason behind ...
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6 votes
1 answer
2k views

What is the average weight difference between composite and metal airliners?

Is there any rule of thumb for weight savings using composite materials. For example, is there an early model large airliner like the B747 or even B737 that later was modified with composite wings or ...
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1 vote
1 answer
124 views

What are Water Vapour Resistant (WVR) engine bags made from?

What specific material are Water Vapour Resistant (WVR) engine bags made from?
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4 votes
2 answers
2k views

What material was/is used on the skin of the Blackbird SR71?

What material was/is used on the skin of the Blackbird SR71 and how was it cooled. How was it manufactured to be stronger with age
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4 votes
2 answers
2k views

Who manufactures the landing gear on the Airbus A350 series aircraft?

Where are they made? I assume that they are made out of titanium. Right?
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3 votes
2 answers
1k views

What materials are suitable for making a mini gas turbine engine?

What materials are suitable for a mini/model gas turbine engine, specifically the fan, compressor, combustion chamber and turbine?
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3 votes
1 answer
368 views

What type of variation in temperature does the wing undergo?

Generally what is temperature variation does the wing of the commercial aircraft like A380 undergo , flying at mach speed of 0.8 and how does it affect the aircraft other than icing , what type of ...
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