Questions tagged [aircraft-performance]
Aircraft performance covers areas such as the amount of runway required to takeoff or land and how fast an airplane can climb or descend.
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By what principle is the lift coefficient calculated without first knowing the lift? [closed]
Or air density, or velocity, or wing area? Question: What principle is applied in the calculation and determination of the lift coefficient? The lift coefficient just seems to be a number. How do ...
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Why aren't we using forward swept wings in commercial airliners? [closed]
What are the advantages and disadvantages of doing so.
Is there any practical problem in execution?
Provide some experiments for examples.
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Can any aircraft beat this car's 0-400-0 km/h record of 28"?
In 2024, the KOENIGSEGG Jesko Absolut set a new world record for 0-400-0 km/h. That's starting from 0 km/h, accelerating to 400 km/h and then decelerating to 0 km/h again.
Without such easy rolling ...
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Can commercial aircraft be equipped with ECM and ECCM equipment?
I've came across an article recently about a commercial aircraft that was traveling from Madrid to Toronto and could not ascend to a higher altitude due to GPS Jamming.
With this apparent situation ...
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F15 Startup Intake drop
So I’m aware that the F15 has intake Ramps that adjust to airspeed and AOA, in order to ensure that the airflow is entering the engine smoothly and not too fast. But why does the system drop the first ...
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Does weight of an aircraft affect its ability to pull G?
This question includes the quote:
A C42 doesn't weigh much, so to pull the 5+ G required to exceed the design specifications of it's wing spar and fixings would require extreme speeds.
I'm not an ...
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How can I find the minimum and maximum airspeeds for efficiency with a specific prop/engine combination?
I'm operating a Cessna 180 with various wing and weight mods with a TCM IO550D engine and a McCauley Black Mac (D3A34C401/90DFA-2 3 blade (88 inch) seaplane prop. I operate Lean of Peak (LOP) for most ...
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How does the lift-to-drag ratio depend on absolute sizes?
A dependency is provided here
$$(L/D)_{\max} = \frac{1}{2} \sqrt{\frac{\pi \varepsilon ~ \mathrm{AR}}{C_{D,0}}}$$
AR significantly affects the outcome in this dependency. AR varies significantly among ...
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Why use the F-35
The F-35B has been troubled by "problems with its stealth coating, sustained supersonic flight, helmet-mounted display, excessive vibration from its cannon, and even vulnerability to being hit by ...
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What is the landing requirement for Klein Vision AirCar?
The Klein Vision AirCar is said to require a runway of only 1,000 ft and a speed of only 75 mph for take off.
But I cannot find any information on its landing requirement such as:
Minimum runway ...
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What was the fastest single engine plane with predominantly wood frame and fabric skin construction?
I've been doing some research and I haven't found a satisfying answer.
The Mosquito was quite fast but it was wood skinned and had two engines. The Bellanca Viking was fabric skinned but used a metal ...
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How much fuel can be saved in a half full of passengers plane?
On a typical airliner (let's say A320 / B737 / or similar), comparing a plane full of passengers vs one half full, how much fuel an airline can save on a trip when the plane is only half full?
(This ...
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Is there a valid case to do the imposible turn(180)?
It has been said many times not to do the imposible turn(180) after takeoff since almost always it ends in a fatal crash.
My question is, if you are flying a Cesnna 172, or any single for that matter,...
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Comparing a Flight In Turbulent Conditions At Va And Vb
First, let's cover definitions for both airspeeds:
Turbulence penetration airspeed (Vb) is the design speed for maximum gust intensity (i.e. the intersection between the 66 fps gust line and the ...
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Lift distribution of a swept wing with twist, dihedral, taper
I am trying to get the lift distribution of a swept wing with taper (in chord and thickness along the span), twist, and dihedral. I know that Kuchemann Index method is used for swept wings but I am ...
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