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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5
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1answer
244 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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which aluminium alloy was used in the 777 fuselage and which one will be in the 777x?

Seems like Boeing is going to use carbon fiber wings for the new 777x, but for the fuselage aluminium will be used, which alloy will be? and which one is it substituting?
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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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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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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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3answers
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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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2answers
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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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1answer
195 views

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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2answers
647 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 passenger fighter jets travel at twice that speed on average. What ...
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1answer
165 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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146 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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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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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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235 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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1answer
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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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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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1answer
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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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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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1answer
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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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1answer
545 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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385 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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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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1answer
110 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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761 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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737 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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1answer
173 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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1answer
2k views

What type of hydraulic oil is used in the aviation industry?

Among the three different types of hydraulic fluid types (mineral based/petroleum based, synthetic esters, naturally occurring vegetable oils) which one is used in the aviation industry and why?
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What materials are used for aircraft windshields?

Is hard plastic or some form of plastic replacing glass in aircraft windshields? Any idea/companies/players in this field?? I have heard there is recent trend as plastics are light in weight and have ...
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1answer
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Why does the MiG-25 have silver-coated panels?

This is about the Mig-25. This documentary on youtube, @10:03, says: Special insulating panels had to be fitted to protect the area around the engines from overheating. The panels were silver-...
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Are artificial magnetic fields used or proposed to be used to shield high altitude pilots and astronauts from charged, high energy radiation?

If not for the earth's magnetic field our atmosphere would be bombarded by high energy plasma (ionized gas) from the sun and other space sources. At very high altitudes and orbital altitudes this ...
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What material is used on the wing surface of this airplane?

This is one of the Redbull's 2015 Flugtag contestants; I was wondering what material is used on the wing surface of this airplane? video here.
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191 views

Could low pressure compressor blades be made of aluminum?

With the compressor blades on a gas turbine, could the low pressure blades be made of aluminum, or would it be catastrophic? Edit: Like the 6061 alloy.
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1answer
502 views

On a small/micro jet engine, can the turbine blades and vanes be made out of ceramic?

I am researching on how to make a small jet engine, and trying to figure out the materials for rotor and stator blades just after the combustion chamber so that they can hold up to the temperatures ...
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2answers
1k views

What is the material composition of aircraft compressor blades?

I read up that aircraft compressor blades are generally made out of titanium. I was curious as to why is titanium the choice of material used for aircraft compressor blades? What alloys are involved ...
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2answers
1k views

Is tungsten a good metal for jet engines, besides the weight penalty?

Right now, the hottest part of jet engines are made from a steel-nickel alloy. Is tungsten a better choice? Pure tungsten has the highest melting point and highest tensile strength of any other pure ...
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Why are the leading edges on the Boeing 787 made from aluminum?

Why are the leading edges of the wings, horizontal stabiliser and vertical stabiliser and the engine's inlets made from Aluminium?
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2answers
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What materials are used to make up a combustion chamber? [duplicate]

What type of materials are used to make up the different sections such as the linings of the combustion chambers in a gas turbine engine. Do these type of materials vary for the different types of gas ...
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167 views

Can the phrases “carbon fibre reinforced polymer composites” (CFRP) and “carbon fibre-epoxy composites” be used interchangeably? [closed]

Does the "polymer" in CFRP imply the use of an epoxy resin?
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1answer
2k views

How can I design and build an aeroplane from scratch? [closed]

Let's say I want to build an aeroplane completely from scratch (not downloading some blueprints on the internet, I mean really designing it myself). The goal is to create a flyable aeroplane from ...
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1answer
416 views

Are flame holders made of a special material other than that used in combustion chamber?

Are the flame holders made of materials which have higher friction coefficients than the combustion chamber in order to create turbulence?
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3answers
963 views

Can stainless steel replace titanium for Mach 3+ speeds?

In the documentary Wings of Russia: MiG-25 and MiG-31, they mentioned both aircraft had to use special stainless steel alloys and arc welding to withstand the Mach 2.83 - 3.2 speeds. I couldn't help ...
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1answer
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What is the tailhook on naval aircraft made out of?

What is the tailhook that enable naval aircraft to land on aircraft carriers, it must be made out of a strong metal to not bend or 'snap' under the force of the thrust that the plane is expelling, as ...
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4answers
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Why has aluminium, rather than steel, prevailed in airliner construction?

As any cyclist knows, steel has many advantages over aluminium: it's stronger (for the same size) it can handle greater forces without needing to be stiffer it has better fatigue characteristics it's ...
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2answers
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When airplanes first got windows, what material was used?

When airplanes were first introduced they were open cockpit - but soon enclosed cockpits were developed. What were the first materials in use for airplane windows? I don't believe plexiglass existed ...
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355 views

Can balloons be stacked in a climable daisy chain to the edge of space? [closed]

How high can a balloon/s be and still be tethered to the ground? The most common problem was finding the calmest place on Earth. The longest balloon chain is 20 km Pictures below are basic ...
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1answer
251 views

How do fighter jets measure how high they are?

I know most of the commercial planes use altimeter to find how high they are. I was just curious in finding out what fighter jets use to to find their height and what are the other technologies that ...
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Maximum/Lowest achievable expansion ratio (generally) in a turbine? [closed]

Let's think about a turboprop with a single shaft. The turbine moves the compressor and the propeller. My question: what is the "limit" to the expansion ratio achieved by the turbine? If we call $5$ ...
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1answer
2k views

What are the wings and fuselage of an airliner made of?

Which materials are used to make the wings and the fuselage of an airliner, for example the Boeing 767 or the Airbus A320?
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3answers
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What material is used to make the hot sections of jet engines?

What metal alloy is used for the hot section of a jet engine? Specifically the exhaust nozzle? I have found mention of a titanium alloy and nickel alloy but nothing with that much detail. What sort of ...
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2answers
328 views

What are the criteria that govern the choice between titanium, composites, and more common materials, like aluminum?

In the newest large commercial jets, composite materials seem to be all the rage. The first thing I wanted to know is why composites were chosen instead of titanium? If I'm not mistaken, titanium has ...