Questions tagged [aircraft-design]

Questions about the different choices that aircraft designers (typically aerospace engineers) make in order to create an aircraft.

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3
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2answers
263 views

Why are there no high wing Canard airplanes?

Just had a thought about canard airplanes while looking at the Tu-144 that features a canard surface on the top of its fuselage. Are there any high-wing aircraft with a top or bottom mounted canard? ...
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1answer
122 views

What is the "mass growth factor" of an aircraft?

How to understand the aircraft mass growth factor? Which physical meaning does it hide? Which are the practical applications?
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0answers
46 views

Why are C17's horizontal stabilizer mounted so high? [duplicate]

The C17 has its horizontal stabilizer mounted at the top of the vertical stabilizer, way above the plane of the wing but most aircraft, including other large aircraft made by the same manufacturer (...
7
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3answers
636 views

What would it take to have a new large civil aircraft manufacturer?

What would it take to have a new large civil aircraft manufacturer besides Boeing and Airbus, that is not state sponsored (C919, MC-21) In other words, what are the chances a new company would break ...
13
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2answers
1k views

Why do helicopter rotors have constant section and angle of attack?

As I understand it helicopter rotor blades keep a constant aerofoil section along their length, and are not twisted. Other rotating aerodynamic devices such as propellors, turbofan fans and wind ...
3
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1answer
121 views

Are Airbus A320 Cabin Door Exterior & Interior Levers Linked?

Was looking at this video on Airbus A320 Cabin door procedures and was wondering if the exterior door lever is mechanically linked to the interior lever? It seems as if the exterior lever will open ...
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3answers
868 views
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0answers
52 views

Suggestion to make a paper [closed]

I'm trying to make a paper for the master's degree, and my synodal are requesting me to propose an electronics applied to aviation/aeronautics to work on it. I have the idea of review if the 5g ...
13
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5answers
3k views

Has there ever been a diesel-electric helicopter?

Occasionally I come across the diesel-electric (DE) design for submarines and freight trains. They say something like "a diesel engine powering an electric drive lets the two operate at their most ...
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3answers
91 views

Calculate Rudder Angle by Bank Angle [closed]

My question: Is rudder angle equal to bank angle? Or, does rudder angle has some relationship with ROT formula? Below is my steps trying to solve this question. Step 1: Found below graph from this ...
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5answers
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What are the hurdles to overcome before purely electric commercial aircraft can fly?

What are currently the largest issues with purely electric commercial aircraft (large scale ones like the size of a Boeing 737)? Are there any organizations right now that are trying to solve those ...
0
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3answers
135 views

Calculate speed by turn angle and distance [closed]

I'm trying to combine two rate of turn formulas, which I found it online this and this. The first is ROT = 1091 * tan(bank angle) / speed in knots The second is <...
21
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3answers
4k views

Do fighter jets have deicing in their wings?

If there is such thing as deicing for fighters? If so, is bleed air or electric heating preferred? I could not imagine that a $50MLN fighter jet would not be able to get the ice off its wings.
0
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1answer
163 views

What are the basic principles of making fighter jets manoeuvrable [closed]

Disregardimg thrust vectoring and other computer-aided functions, what are all the basic factors of making a fighter jet manoeuvrable? Using basic physics design principles such as high thrust to ...
0
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1answer
60 views

What is the windshield Heating Element (Thin Cable) for Aircraft or Rotorcraft?

My question is related with the heated windshield employing the some type of heating elements. Very very thin metalic cables are in use between two glasses of windshield. I have searched but noting ...
52
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3answers
14k views

What are those things at the wing tip of an aerobatic aircraft?

See: The radially placed needle-like things that resemble a snowflake in the first picture. The triangular structure in the second picture. In the third picture, the object placed on only one wing In ...
5
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1answer
1k views

Why not use the alternate static port at all times?

One of my club's small planes apparently has an intermittent problem with moisture in the static port line, so the recommendation is to always fly with the alternate static port open. That leads me to ...
16
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1answer
2k views

What is the purpose of this aileron trailing edge strip?

See the following photos of the LH aileron of a Beechcraft King Air B200: Source: own work Source: own work As seen in the above photos, the Beechcraft King Air B200 has what I would describe as a ...
4
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1answer
173 views

Can a jet-engine aircraft fly all the way to its service ceiling at its maximum takeoff weight? [closed]

I am trying to understand how high an aircraft can get to at its maximum takeoff weight (minus whatever fuel is consumed in getting to that altitude). Can it make it all the way to its service ceiling?...
25
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3answers
7k views

Why do some helicopters have the tail rotor mounted higher than the tailboom?

Why do some helicopters have the tail rotor mounted high above the tailboom, whereas others have it at the end of the tail boom? Above the tailboom: Wiki Commons At the end of the tailboom: Boeing....
31
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2answers
12k views

What is this "No Hand Hold" thing in the P-51 Mustang cockpit?

Does Anybody remember Combat Flight Simulator WW2 Europe Series ? In the P-51, there is a "something" with "No hand hold" text on top of it What is that ? Image source
5
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1answer
148 views

Do UL aircraft complying with LTF-UL need to copy an existing design pattern?

With my current pipe dream being to get physically involved in aviation instead of only theoretically, I looked into the regulations for ultralight planes in Germany. On multiple occasions in the ...
7
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3answers
244 views

Why do smaller RC helicopters have visible twist in their rotors, and slightly bigger ones do not?

Smaller, cheap, RC helicopters generally have very pronounced twist in their blades, and also vary their chord - slightly larger, slightly more expensive RC helicopters have no visible twist or chord ...
34
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7answers
8k views

Why are jet aircraft never designed with a slower cruise speed?

All jet airliners have a cruise speed between Mach 0.82 and Mach 0.85. At those speeds the aircraft are flying at their maximum subsonic speed. Any greater cruise speed would only be ...
2
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1answer
105 views

Are horizontal engine pylons generally shaped to provide lift (in either direction)?

Most civil multiengine jets and some civil multiengine propeller aircraft have engines mounted in nacelles on the ends of pylons extending some distance away from the wing or fuselage. Wing-mounted ...
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1answer
155 views

Would blade-less (Dyson style) jet engines work? [duplicate]

Is it possible to design an aircraft with blade-less (same concept as Dyson) design to generate thrust? What are some of the key benefits, drawbacks and examples of attempts (if any) at this kind of ...
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2answers
1k views

How exactly do the Beechcraft 1900's stabilons work?

The Beechcraft 1900, in addition to the usual wings and vertical and horizontal stabilizers, and the extra vertical tail surfaces added for improved directional stability, has a pair of horizontal ...
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0answers
128 views

Why do white marks on the spinners in front of engines have different patterns? Not Yellow? Omitted for some models?

In aeroailas' answer I understand that the cones in front of the props/fans are called spinners. In Farhan's answer I understand that the ehite marks painted onto the spinners act less as scarecrows ...
28
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2answers
34k views

What are the advantages of more than 4 propeller blades?

I have heard that propellers with more than four blades are not as efficient as 4 or less blades because of lower thrust which may result from interfering prop-streams. But I see the ATR-42/72 and ...
7
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4answers
2k views

Is a VW Beetle engine a good choice for a light two-seat aircraft build? [duplicate]

What do you think of an air cooled Volkswagen engine for building a light two-seat airplane? This is probably the only engine I can get my hands on that needs no reduction gear and has enough HP. ...
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0answers
33 views

Mass flow rate for jet engine combustion [duplicate]

Want to know about the mass flow rate in typical turbofan engine combustion chamber
3
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1answer
88 views

Angle of Attack influence on Adverse Yaw

we are analyzing an aircraft's lateral-directional control characteristics with self-made code. We have observed that the aileron's influence on the body axis yaw moment is quite sensitive to the ...
4
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1answer
225 views

What CAD software is most commonly used for aircraft design?

What is most commonly used CAD software for aircraft design? AutoCAD, CATIA..?
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2answers
254 views

What is the difference between the series and parallel yaw-damper systems for the 707?

Some excerpts from the Pan Am 707 AOM indicate that the 707 can have one of two different yaw-damper systems, "series" and "parallel", with differing capabilities: YAW DAMPER The ...
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5answers
5k views

Why are no recent small aircraft designed to be "characteristically incapable of spinning" as the Ercoupe was?

I'm a student pilot at a flight school that primarily flies RV-12s as a trainer. We had one day that through a booking error meant that all the RV-12s were booked so we had to use their Ercoupe 415-C ...
0
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1answer
241 views

What are the advantages and disadvantages of fluidic thrust vectoring on aircraft?

The Rockwell XFV-12 was a research project for combining supersonic speed with Vertical Take-Off and Landing, From wikipedia: The XFV-12 used a thrust augmented wing concept... in which exhaust would ...
0
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1answer
156 views

Can a fixed pitch propeller be designed to act as both a propeller and a generator?

The angle of attack (AoA) plays a major role in designing a propeller for specific uses, such as if it is to be designed for aircraft propulsion the AoA must be high, while the AoA must be low if it ...
73
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10answers
139k views

What happens when an airplane stalls and why do pilots practice it?

When a non-pilot hears the word stall, it brings to mind what happens when a car stalls - the engine quits. It seems like that would be a dangerous scenario in an airplane. From a non-pilot ...
2
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1answer
1k views

Why aren't there any jets with horizontal-stabilizer-mounted engines? [duplicate]

Looking at the spectrum of where jet aircraft put their engines, there are examples of almost every place that could conceivably used to carry a jet engine: slung under the wings buried inside the ...
12
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4answers
10k views

How are aircraft wings protected against flutter - aerodynamic oscillations that can break bridges?

A wing and a bridge are both exposed to flutter, a transverse wind distorting them by resonance. Aircraft flutter: Aircraft flutter, source (video) Bridge flutter: US Tacoma-Narrows bridge collapse ...
2
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3answers
153 views

How the AOA, Pitch and FPA are changing during a flight maneuver

For a steady state flight, there is a equation that FPA + AOA = Pitch, but how these three variables are correlated during a flight maneuver like currently I am in a leveling flight and then I want to ...
6
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2answers
772 views

Why do wings prefer laminar flow if cd is lower for turbulent flows?

Can anyone please explain to me why we prefer to maintain laminar flow over wings, despite the fact that the overall coefficient of drag appears to reduce as the Reynolds Number increases? I have read ...
5
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3answers
318 views

Why have high lift devices on both leading and trailing edge?

Trailing edge devices such as flaps increase lift by raising lift coefficient at s given AoA. Leading edge devices such as slats increase lift by raising stall AoA. The former is nice because it ...
0
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1answer
94 views

Would this concept of Autogyro/Gyroplane be efficient or practical?

First, i'm quite ignorant on aerospace engineering, so I hope I don't make too many incorrect assumptions. If you don't know what an Autogyro/Gyroplane is, here is the Wikipedia article of it. The ...
3
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2answers
257 views

Why is aircraft design so simple compare to other aero-applications?

All design in aviation is relatively simple and clean, without some fancy stuff, compare to others aero-applications. What is reason for this, because every aero application has same goal, get lift ...
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2answers
168 views

Why large freighter planes still do not use intermodal (ship) containers given that size and shape are not problems?

Recently I found this article this article about the concept of directly sit on a pile of intermodal containers and lock them in place. Whether it is plausible to open such a huge opening ventral of ...
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1answer
83 views

Can a Magnus/Coanda effect be used on wings with hot gases for more efficiency? What are current aircrafts that uses such system?

Well, I don't know much about this type of mechanism, and the only post I could find that has something similar to what I'm asking is this one, but isn't quite what I'm asking. So, the idea would be ...
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0answers
69 views

How expensive is the structural materials on a stealth aircraft compared to its other components?

Well, I couldn't find much information about the prices on the materials used on stealth aircraft, but nevertheless, its huge price tags are often quite obvious. The B-2 bomber, for example, costs 2 ...
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1answer
125 views

What are the feasibility of making a spherical aircraft using Magnus/Coanda Effect? [closed]

Well, I'm quite ignorant in aerodynamics in general, but I couldn't find any aircraft that fits this description. And yes, I know that wouldn't be as efficient as a conventional aircraft, but I'm ...
9
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8answers
3k views

How would you design an airplane to counteract a single engine’s left turning tendencies?

How would you design an airplane to counteract a single engine’s left turning tendencies caused by torque, p-factor, spiraling slipstream and gyroscopic precession without pilot input or use of rudder?...

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