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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Are departure briefing and take-off briefing the same thing? If the same, when is it appropriate to brief?

Are departure briefing and take-off briefing the same thing? If the same, when is it appropriate to brief? (before starting the engine, while taxiing, just before takeoff) I am asking the question as ...
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Why are the red/white control surfaces under the wing extended during a take off?

So these pictures are more than a little dated as the CF-101 Voodoo's have not been flown since the mid 80's. In these two photos we can see the Voodoo is performing a full afterburn take off. Note ...
1 vote
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Why does V2 decrease for intersection takeoff

I have noticed that the VR and V2 decreases for same FLEX when departing from an intersection runway even when sufficient stop margin is available. What is the reason for this? And also does EFB ...
5 votes
4 answers
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Why is it that some planes require the AC to be turned off during engine start and take off?

I've noticed that some pilots turn off the climate control for start up and takeoff, like the Sr22. Why is this? And has this been phased out with new technology?
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At take-off, what is the deflection angle of the rudder for the legacy Hornet? [duplicate]

At take-off, what is the deflection angle of the (legacy) F/A-18 Hornet's rudders?
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What is the minimum runway required for an a320 under 72,000 kg

How much is the absolute minimum runway required for takeoff and landing? How much could you reduce the takeoff/landing distance using various methods (eg-standing takeoff)? I'm talking about an A320 ...
3 votes
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ACN/PCN Reporting System - Tire Pressure

I have an Airbus A320neo WV054 and I want to operate at a RWY that has PCN 55/R/D/Y/T. Below is my aircraft ACN data as per the Aircraft Characteristics Manual. Looking at the table I can see that my ...
0 votes
1 answer
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Can airplanes rear wheels spin on take off (like a car launching from a halt, where its rear tyres spin before they get grip)

Just wondering (especially in the rain) if an airplanes rear wheels will spin like a cars rear tyres will spin when it accelerates from a halt.
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Why would an F-35 take off with air brakes behind the cockpit extended?

At the Farnborough Airshow, I saw an F-35 take off with air brake behind the cockpit extended. Why would they do that?
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What is this guy doing while walking along with the moving plane at the FRA airport?

While the aircraft was moving backwards (targeting takeoff), a guy was attached to it by a thread, probably "listening" to something, and was following the plane by walking at the same pace. ...
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5 votes
4 answers
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Why is flap retraction done in stages?

After takeoff and upon achieving positive climb, why is flap retraction done in stages? For example, in the Airbus there are characteristic speeds after which flaps can be retracted (S and F speeds) ...
1 vote
2 answers
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Takeoff-chart Interpolating Numbers from a range

I'm studying for my AIRAT (Instructor Written) in Canada using Nizus, but I've always had trouble answering the questions about takeoff distances at 27 ºC when given a chart with 20 ºC and 30 ºC, even ...
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Who is the author, or the original book of this equation to obtain an approximate ground roll take-off distance?

It's an equation to get an approximate value of the total ground take-off distance (including the distance after reaching Vr when it begins to rotate, until all wheels stop touching the ground). This ...
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Control surface deflection during takeoff

What is a reasonable (or typical) control surface deflections required for takeoff? I would like to know two ball park values if possible elevator deflection for conventional transport aircraft ...
1 vote
1 answer
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Why is rare to see landings from East to West at the AJU airport?

Every day at the Aracaju - SE, Brazil Airport (IATA: AJU, ICAO: SBAR) planes take off from West to East and lands from East to West. But in rare occasions they will land from West to East. I think it ...
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Do pilots of piston/prop aircraft have discretion to determine how much runway is required for an intersection departure?

For piston/prop aircraft requesting intersection departure, is it pilot discretion for the minimum amount of runway length required? Is there a takeoff calculator in conjunction with calculations?
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Reasoning for an inboard flap- take off [duplicate]

so Ive been looking into airplane flaps, like the longer one for take off- Is it correct to say that the only reason to have one is for take off, to make it take off easier? And so when they take off, ...
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Elevator or Aileron?

I was just looking at an airplane take off, and when it was taking off, some flaps were facing down at the back of the main wings- Are these Ailerons or elevators please? I did some research but the ...
1 vote
1 answer
359 views

How can I estimate the coefficient of lift for take off?

For the CLto (take off lift coefficient), is there some way to estimate this? I was thinking of using CLmax but wouldn’t this be too big? I was thinking maybe CL cruise?
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1 answer
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The stall velocity condition: Exactly what is stall velocity? [closed]

Question: if my stall velocity is 20m/s, then... If the airplane is travelling at a velocity greater than or equal to the stall velocity, can one assume the plane will not stall? Can one assume that ...
3 votes
1 answer
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Takeoff distances published in OEM manuals

Background For academic research purposes, I have developed a first-principle takeoff performance model that returns a takeoff distance required (TODR) based on the aircraft type (incl. its associated ...
3 votes
3 answers
474 views

What's a typical maximum acceleration of a turbofan-powered airliner taking off?

Whenever I fly on a turbofan-powered airliner, I always notice how much acceleration there is, which seems like more than any car I've ever owned could do. (That might be an illusion, I realize; ...
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Any aircraft that can takeoff or land on 150 m / 500 ft runway?

Just spotted on Google Maps: What could be the purpose for building a 150 m / 500 ft runway? I understand that no regular aircraft can takeoff or land on such distance, so certainly the reason isn't ...
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Take-off and landing a Waco Standard Cabin QDC

I'm sure you hear it all the time: Someone's writing a book and want to know how to fly a plane. I'm no different in that regard. However, I have a specific plane: a Waco Standard Cabin QDC, 1931. ...
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5 answers
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What is the indicated airspeed necessary to exit ground effect on takeoff?

I always thought that a plane needed to be at stall speed or greater to be able to exit ground effect on takeoff. However, after seeing the YouTube video in the link below I am not so sure. ...
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How do I calculate the correct rotation speed for a given density altitude?

The Airlines calculate the rotation speed of every takeoff based off the weight given to them from their operations people and also the density altitude conditions. In General Aviation we don't ...
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If I put two ductfans behind one another, would I got the sum of the rated thrust or other thrust values?

I am trying to design a VTOL system for a drone and I don't want to have extending motor arms that make it look like a quadcopter. I want to use duct fans and thrust vectoring nozzles. However, the ...
16 votes
3 answers
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Why is this plane struggling to gain altitude?

Here in this video, you can see an airplane trying hard to gain altitude (happens at 1 min 17 secs, original video): Plane Gets Struck By Lightning I am skeptical. Does it actually happen, or is the ...
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Why does a Boeing 747-8 take more runway length to take off, compared to an Airbus A380?

The Airbus A380 is the largest passenger airliner. That also includes the Boeing 747-8. Meaning, the Boeing 747-8 is smaller than the Airbus A380. As far as I know, smaller planes use less runway ...
2 votes
1 answer
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How do flights fly on some special days when there are firecrackers bursting near the source/destination airport? [duplicate]

I mean there might be festive nights like New Year eve, when there is spectacular display of colorful firecrackers in the sky, but when there are flights descending or ascending near a city with an ...
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2 answers
193 views

Airplane accidents that happen during take off and landing [closed]

I have just seen some documentary about Munich Air Disaster in 1958. I found that the real reason behind this disaster is related to the aircraft performance with the thick snow runway during take off....
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How to calculate runway length required for an A380 to takeoff? [duplicate]

I was wondering, how much runway length does an Airbus A380 require to takeoff? I saw other answers on Aviation S.E. but I didn't find how to calculate it to (I am curious to know how to calculate it)....
3 votes
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Has there ever been a two engine Air Carrier where both engines failed during the takeoff run resulting in an accident?

Has there ever been a two engine Air Carrier anywhere that has had both engines fail at some point during the takeoff run that resulted in an accident?
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1 answer
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Why does Vr increase with lower air density and decrease with higher air density?

Can someone explain why Vr increase with lower air density and decrease with higher air density? I read such a phrase in my ATPL(A) performance textbook, but without further explanation. As far as I ...
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7 answers
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Why do pilots slowly give the plane more thrust during takeoff?

I have mostly seen pilots slowly pushing the throttle to toga during takeoff. But why? Why don't they just directly put the throttle to toga? Wouldn't that save runway length?
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How to calculate the takeoff speed for a hypothetical aircraft?

Given some basic information such as: aircraft weight wing load (including wingspan, and basically the whole wing configuration) airfoil profile coefficient of lift angle of attack Is it possible to ...
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Should a runway overrun be expected if takeoff is begun with one-engine-out?

Multi-engine aircraft have enough power to successfully takeoff if one engine fails after V1. But what if, on a runway equal to the specified takeoff distance, someone decided to roll with one engine ...
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2 votes
2 answers
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How to do the land maneuver if I got complete thrust loss after liftoff with runway ahead?

I am flying a single engine aircraft and after liftoff in air at low height, I lost the engine but I till have some runway length ahead, what should I do? Land straight ahead? How could I tell if I ...
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1 vote
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How to fly a quick return to origin after takeoff

If I want the shortest traffic pattern to play touch and go or I got a emergency right after liftoff but the engine is still working, I just want to get back to ground as soon as possible, what is the ...
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How could I minimize the take off fuel consumption?

How could I minimize the aircraft total takeoff fuel consumption, taking into account all fuel used from start of take-off roll until reaching a safe altitude? For example, if I fly with flap ...
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Which flight maneuver is better for a takeoff emergency after liftoff, a tear drop (180° turn) or a 360° turn?

Let us say I got a time critical emergency right after the liftoff (like a fire, complete power loss) and I need do a return-to-runway and re-land maneuver. Which option is better, a 180-degree turn ...
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Does a wing produce an appreciable amount of lift during the takeoff roll prior to rotation?

I was hoping for some insight on this, perhaps also from pilots who have used AOA indicators. This because I assume that an AOA indicator is the only means to get at least an idea of how much lift is ...
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Is there any practical benefit of the Boeing-787 to perform near vertical takeoff?

In a promotional video for the Paris 2015 airshow, this video was released promoting the new Boeing 787's near vertical takeoff capability. Whilst highly impressive, I was wondering if there is any ...
2 votes
1 answer
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Why does the Information Manual say "C172S - Flaps 10 (Preferred) for Normal Takeoff", when the models before S-model do not have this note?

Do Flaps 10 really do anything performance-wise other than reducing ground roll and distance over a 50-foot obstacle? If not worried about clearing an obstacle, does a Flaps UP-normal takeoff make ...
7 votes
1 answer
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What is "alternate takeoff" in this PT6A performance table?

I am flight mechanic, and I would like to know about this performance limitation: What is the definition of alternate take off? Why is the alternate take off temperature limit (ITT) lower than max. ...
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Can flaps be used to perform rotation and flare?

TL; DR using flaps to directly control sink/climb rate near ground = simpler and faster response = easy to fly airplane? Rotating is the pitch up during takeoff that causes the aircraft to leave the ...
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What effect does a direct crosswind have on takeoff performance?

Is the take-off distance increased by a direct crosswind?
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What should be the thrust weight ratio for takeoff? [closed]

I am doing some calculations for preliminary design of an airplane and I was wondering how I would go about determining the minimum thrust to weight ratio needed for the aircraft to takeoff. Which ...
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1 answer
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What are the different types of take-off minima at the bottom of a Jeppesen airport diagram?

Anyone that could explain the bottom plate, what’s the difference between all those minima?
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Why is the DC-9-80 ("MD-80") prohibited from taking off with a flap setting between 13 and 15 degrees?

A bit of digging into the 7Z9363 accident investigation has brought up some interesting information regarding the DC-9-80 ("MD-80")'s flap system: Flaps may be positioned in any of the six ...
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