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Questions tagged [takeoff]

Takeoff is the first phase of flight, when an aircraft lifts off from the runway or other surface.

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How do airports in hot climates handle extremely high temperatures?

In June 2017 dozens of flights were cancelled in Phoenix, Arizona because of temperatures exceeding 120 degrees Fahrenheit/48.9 degrees Celsius.1,2 Hot air at a given air pressure is less dense, ...
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Derivation of the Takeoff equation

I am trying to understand the derivation of some simple equations to calculate the neccecary takeoff speed for an airplane (under ideal conditions). Which is taken from 15. Takeoff and Landing. My ...
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What plane needs the least amount of run way for a rolling takeoff? [closed]

Excluding Harrier type jets and headwind, what single-engine plane, that I can charter legally, needs the least amount of runway to takeoff? Is there a list that has planes' runway requirements from ...
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How much actual difference does fixed pitch propeller make in takeoff distance?

So it's possible to buy fixed pitch propellers which are either optimised for takeoff or for top speed. I guess most airplanes have a compromise. Considering a training aircraft like a Cessna 152, ...
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Has the “Foote takeoff” technique really existed, and how did it work?

Reading The Crash Detectives: Investigating the World's Most Mysterious Air Disasters by Christine Negron, I came across the following description, in relation to some early de Havilland Comet ...
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Launch control equivalent while take-off

What is the proper term used when the plane is stopped and the engine is ramped up and after a certain thrust is reached, it suddenly starts off with a jerk.
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Is lowering V1/VR (and runway length required) the only reason for flaps at take off?

I've read that some aircraft (examples include the Saab 340 and the Fokker 100) can perform flapless take offs, provided there is enough runway available. It's also my understanding that, in terms of ...
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What are the disadvantages for using short-field take-off technique?

It is obvious that using the short runway takeoff method(hold the brake till engine get full power) could get the aircraft in air within a shorter runway distance.Then why it is not used for every ...
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Why does the Eurofighter Typhoon pitch up on brake release?

In the video here of an airshow take-off, it's noticeable that when the brakes are released there's a brief but pronounced fluctuation in pitch as the aircraft accelerates. This is something you see ...
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How to use Rudder during takeoff in single engine propeller aircraft? e.g. Cessna 172

Background: I am a complete beginner on Flight Simulator X: Steam edition, using a simulator setup with rudder pedals with realism set to the max (to simulate more realistic flying). I understand ...
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What Is a “Fully Stalled” takeoff?

Reading this article (on the Boeing 737 MAX saga; irrelevant), I found the following excerpt: Boeing ultimately accepted Davies recommendation and, we understand, halted production of the 707 for ...
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What is an airliner pilot's first go-to if he or she doesn’t have a positive climb rate immediately after take off?

Assuming a typical transport-class aircraft, what would the pilot do if the aircraft does not have a positive rate of climb immediately after takeoff? Would the pilot just lower the nose to pick up ...
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Has someone with no experience at all ever taken off in a plane? Could they?

I was watching Mystery Science Theater 3000 and their showing of 1970 TV movie/pilot San Fransisco International. One of the plots in the movie involves a twelve (or so) year old boy, who, alarmed ...
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Where and when would a 737-700 be taking off at an altitude of 19 kft?

Another question triggered by reading the 737 technical site; according to this section of the page on the 737's pressurisation system, the 737-700 comes with an option that allows it to safely take ...
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How does density altitude affect Taxi-Out Time?

To keep things brief, for a data exploration project, I calculated density altitude for a couple airports and used flight statistics from https://www.transtats.bts.gov/ONTIME/Departures.aspx. I was ...
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What is a Second Segment Weight Limit?

I am very interested in the principles of take-off performance optimization. During my research I found an interesting picture, showing the software used by a European carrier. However, the output ...
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When a B-2 takes off, does it use some device to ionise the airflow in front it?

At takeoff, does the B-2 use some sort of ionization device in the leading edges of its wings?
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What are the take-off parameters for the B-25 Mitchell?

What is the take-off distance and speed in standard atmosphere (59°F, 29.92 inHg, 0% humidity) for the B-25 Mitchell with max, minimum, or average payload?
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Can the assumed temperature be lower than the flat rated temperature?

I was playing with reduced takeoff thrust in a Boeing 737-800 simulator yesterday and was surprised that I could enter assumed temperatures below the flat rated temperature of the engines. The ...
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What is the average climb gradient of an aircraft during the takeoff and early phase of a departure procedure?

On chart plates it is written the minimum climb gradient with which an aircraft should climb for obstacle clearance or after ATC request (for traffic flow management etc.). However, since this is the ...
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What will be the immediate action by the pilot and ATC if any plane blocks the runway while landing?

Suppose, if the Airport has only one runway and one plane is trying to take off at the end of the runway and other plane trying to land from the other end of the runway. Due to any reason if the ...
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What would be the challenges to taking off and landing a typical passenger jet at FL300?

Suppose it was somehow possible build a runway at FL300. Yes, doing so would be incredibly expensive, and it would be a mammoth civil engineering task, and the downsides would probably by far outweigh ...
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Would building an airport at 30,000 ft save money?

So... this would obviously cost a ton of money initially, but long-term, I believe the savings both environmentally and financially would be returned many times over. If a building can already be ...
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What does 'laterally aligned' mean in this description?

In the Airplane Flying Handbook there is a section on crosswind takeoffs that mostly makes sense. However, this paragraph confuses me. Takeoff Roll As the forward speed of the airplane ...
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How does humidity's effects on density altitude get factored into Takeoff Distance Performance Charts?

Given that density altitude is a function of Pressure, Temperature, and Humidity, and most takeoff performance charts adjust takeoff distance as a function of pressure altitude and temperature, how is ...
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Can a Bombardier CRJ derate the takeoff thrust?

I have recently been flying a Bombardier CRJ 700 in a simulator and wondered how to derate the engines for takeoff. I know how the takeoff thrust derating is selected in Airbus and modern Boeing ...
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Has an earthquake ever complicated or prevented a safe landing/takeoff?

This question on being able to see ground effects of earthquakes from the air got me wondering: No doubt a severe earthquake at the wrong time could hinder even experienced pilots, but I expect a ...
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Why don't short runways use (downhill) ramps for takeoff?

This is a followup on question: Why don't short runways use ramps for takeoff? There are multiple answers to that question that answer why an uphill ramp at the end of the runway does not make ...
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Why don't short runways use ramps for takeoff?

Say you had a runway for light aircraft, but only 700 meters or so of runway. Wouldn't it help to end the runway with a ramp that is ~40 meters above ground and slightly facing the sky at a gradient ...
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Are glider winch launches rarer in the USA than in the rest of the world? Why?

I had heard before that winch-launching gliders was a relatively rare practice in the USA, while quite common in the rest of the world. My data is mostly anecdotal, but I do know gliding clubs in ...
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Can a commercial pilot decide where to make their turn after departure?

If there aren't published vectors to tell a commercial pilot which heading to take as they climb, can they decide where to make their initial turn on their own or would an ATC always involved in where ...
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Commercial aircraft minimum and maximum climb angle and rate?

Is it possible for a commercial pilot to set a minimal rate of climb - for example, 350' NM climb rate, target heading of 200 degrees and target altitude of 2000 feet above MSL - before getting radar ...
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What's the relation between speed of an aircraft and takeoff distance?

I'm making a tool that when given : weight of aircraft , takeoff speed , runway length and some other parameters , it analysis the takeoff performance and states whether using the brakes now is safe ...
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Will the plane take off? [duplicate]

First, I was unsure where to ask, here on on Physics SE. Second, I have a strong feeling it might have been asked already somewhere but I didn't find it - so if it was, please link as a duplicate. ...
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Why do some helicopters have wheels instead of skids?

I have noticed that Black Hawk helicopters have tires, but I have not seen one take off like a plane. When would a helicopter need to use a running take off or landing? When is it determined ...
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Is it possible that commercial airliners use an EMALS or other form of electric launch? [duplicate]

I am doing a big project for school over the summer, and was wondering if anyone can help? I just want a professional opinion on the idea. Is it possible or no?
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Does the auto thrust at takeoff compensate for asymmetric engine characteristics?

When a percentage thrust has been determined for take off the auto thrust system (Airbus) or the auto throttle (Boeing) will send the data to the engines FADECs to provide the required thrust. When ...
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Why does the thrust limit page display the thrust in percentage (« % ») and not in pound-force?

When the pilot sets the takeoff engines thrust on the Flight Management thrust limit page that displays on the CDU (or MCDU) interface, the selection will finally show as a percentage. The direct ...
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Why don't B747s start takeoffs with full throttle?

Why does the 747 start takeoff with partial power and increase to full throttle later down the runway, when the A380 for example starts on full? Source This is not the same question as: Is it ...
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How will the alpha lock function intervene when performing a takeoff at heavy weights on the A320?

In the FCTM for the A320 family of aircraft's under the SOP Takeoff chapter it is mentioned that the alpha lock function can intervene when performing a takeoff at heavy weights. Can someone please ...
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Does diving after a take-off help gaining altitude?

I have often read fictions about aircraft, where a pilot does an action that I cannot explain: During a takeoff with an heavy aircraft (four motors for example), the pilot rolls to the end of the ...
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Do seaplanes need to get clearance for takeoff?

Do seaplanes need to get clearance for takeoff? Do they have ATC? How do seaplanes get clearance to takeoff?
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What are the triggers of the MD-80's takeoff configuration warnings?

I'm helping develop sounds for a MD80 simulation and I've noticed the MD has up to 5 alarms that fire when you advance the throttle and the aircraft is not properly prepared for takeoff: "Beep beep ...
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Has a small airplane ever been air launched from a heavy-lift helicopter?

I would like to know if a small airplane, like a Cessna, has ever been air launched from a heavy-lift helicopter, perhaps as a stunt or as an aviation experiment? I think it would have been a simple ...
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Are there any aircraft where minimum-V1 is limited by Vmcg?

V1, unlike all the other Vspeeds, is not rigidly determined by the laws of physics, the aircraft’s specific abilities, and the conditions of the particular takeoff being attempted,1 but is, rather, ...
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Why does the DC-8-70 have the same MTOW as the DC-8-60, despite its more powerful engines?

The DC-8-70 is a more-or-less straight reengine of the DC-8-601, replacing the obsolete JT3D-3B low-bypass turbofans of the DC-8-60 with the CFM56-2C1 high-bypass turbofan. According to Wikipedia, ...
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Landing in very high winds

A few weeks ago, a storm passed through my area with winds reported at 55kt and gusting to 68kt. Many light planes managed to break their tie-down ropes and were flung around the ramp area, which isn'...
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Why not separate out the two definitions of V-1 into two separate Vspeeds?

V1, officially the takeoff decision speed, has, somewhat infamously, two separate definitions: It is defined as the minimum speed at which, if one engine fails, the pilots can press to liftoff and ...
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Why is indicated airspeed rather than ground speed used during the takeoff roll?

My instructor asked me this question during my lesson and I couldn't come up with any answers. He asked why do I need to look at the indicated airspeed rather than ground speed when in takeoff roll or ...
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What are the pros and cons of practising figure-eight landings on perpendicular runways?

This is just a gee-whiz question, I have no intention of doing this nor am I trying to get anyone's blessing on this. Part of remaining current to legally take passengers up in a plane is having 3 ...