Questions tagged [takeoff]

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

Filter by
Sorted by
Tagged with
1 vote
1 answer
77 views

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 ...
user avatar
  • 13
0 votes
1 answer
81 views

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 ...
user avatar
1 vote
1 answer
137 views

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 ...
user avatar
  • 111
3 votes
3 answers
223 views

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?
user avatar
  • 131
0 votes
2 answers
116 views

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, ...
user avatar
0 votes
1 answer
190 views

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 ...
user avatar
1 vote
1 answer
155 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?
user avatar
-1 votes
1 answer
165 views

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 ...
user avatar
3 votes
1 answer
111 views

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 ...
user avatar
3 votes
3 answers
274 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; ...
user avatar
  • 1,379
-4 votes
4 answers
273 views

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 ...
user avatar
  • 3,726
8 votes
3 answers
275 views

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. ...
user avatar
2 votes
5 answers
253 views

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. ...
user avatar
3 votes
1 answer
193 views

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 ...
user avatar
0 votes
1 answer
102 views

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 ...
user avatar
16 votes
3 answers
7k views

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 ...
user avatar
  • 1,475
8 votes
2 answers
4k views

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 ...
user avatar
2 votes
1 answer
461 views

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 ...
user avatar
0 votes
2 answers
188 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....
user avatar
2 votes
0 answers
90 views

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)....
user avatar
3 votes
2 answers
297 views

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?
user avatar
  • 17k
8 votes
1 answer
400 views

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 ...
user avatar
  • 1,629
18 votes
7 answers
6k views

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?
user avatar
0 votes
1 answer
230 views

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 ...
user avatar
  • 3
-2 votes
1 answer
203 views

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 ...
user avatar
  • 3,076
2 votes
2 answers
149 views

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 ...
user avatar
  • 1,579
1 vote
2 answers
174 views

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 ...
user avatar
  • 1,579
8 votes
5 answers
670 views

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 ...
user avatar
  • 1,579
8 votes
3 answers
3k views

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 ...
user avatar
  • 1,579
3 votes
3 answers
438 views

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 ...
user avatar
  • 746
0 votes
2 answers
173 views

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 ...
user avatar
2 votes
1 answer
127 views

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 ...
user avatar
7 votes
1 answer
541 views

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. ...
user avatar
  • 73
9 votes
6 answers
2k views

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 ...
user avatar
  • 3,076
8 votes
3 answers
1k views

What effect does a direct crosswind have on takeoff performance?

Is the take-off distance increased by a direct crosswind?
user avatar
  • 159
-3 votes
1 answer
176 views

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 ...
user avatar
7 votes
1 answer
969 views

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?
user avatar
18 votes
1 answer
3k views

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 ...
user avatar
  • 26.1k
3 votes
1 answer
495 views

How big a risk is to abort take-off before V1 with uncontained engine fire and side-wind?

The Blue Panorama flight 1504 had uncontained engine fire just before V1 during take-off. The pilot continued the take-off and succesfully landed the plane with one engine. In the TEDx talk the pilot ...
user avatar
0 votes
1 answer
306 views

Is using a DERATE for Takeoff actually reducing the power of the engine?

When one chooses a DERATE for takeoff (TO-1 or TO-2 in the case of a B737), does the system actually reduce the available thrust of the engines, or is it computing a N1 that corresponds to the reduced ...
user avatar
-1 votes
3 answers
188 views

Downwind Myth Question

I was reading a discussion about the "Downwind Myth" and a doubt arose: If we are taking off with a 50knots headwind, that wind component will be part of our dynamic pressure, and so in that ...
user avatar
5 votes
3 answers
1k views

Is there a crosswind that would perfectly cancel out the "torque" of a C172 on takeoff?

We all know that on takeoff you need right rudder in order to balance out the "torque" of the propwash hitting the tail. Is there an exact crosswind that would cancel out this torque?
user avatar
0 votes
1 answer
177 views

Referring to the B737NG, at what point (height) does a TOGA revert to LVL CHG after the takeoff?

If one takes off with HDG SEL armed and no vertical mode (like VNAV) armed, at what height (AGL) will the vertical mode switch from TOGA to LVL CHG, and what will be the IAS applied? Also, why isn't ...
user avatar
4 votes
1 answer
456 views

What are the equations to compute takeoff and landing distance?

I am flying a Piper 28-336 Dakota. Based on this paper I was able to reproduce the take-off distances from the POH and incorporate the calculations directly in Excel. It can be seen that the effects ...
user avatar
0 votes
2 answers
184 views

In general, what are the RPM ranges/differences between the various compression stages on a 2 or 3 spool (LP,IP,HP) turbojet/fan engine?

I have a general interest in jet engines and am pretty new to the topic so I wanted to toss this question into the wind as I don't have any previous experience or knowledge to pull from and haven't ...
user avatar
0 votes
3 answers
208 views

What would be the challenges for a pilot taking off into a headwind of just under the clean stall speed?

If a strong and fairly steady headwind was coming down the runway at just under the stall speed for a clean configuration/weight, what challenges would a pilot face? Or would it be fairly easy? Is ...
user avatar
-2 votes
1 answer
221 views

Why does the pilot do this when taking off?

In the past (before the pandemic, of course), when riding commercial jets, I noticed that sometimes, the pilots would bank to port, then to starboard, and repeat that multiple times, while climbing ...
user avatar
0 votes
0 answers
42 views

headwind, tailwind, weight, density exponents for DR400/180

I am trying to build a ground roll chart for Robin DR400/180 following the procedure described http://www.eaa1000.av.org/technicl/takeoff/topaper.htm#References. Does anyone know the tailwind, ...
user avatar
1 vote
0 answers
112 views

What does a ski jump takeoff feel like?

Some aircraft takeoff from aircraft carriers using a ski jump. What does it feel like to takeoff this way? Does it feel like an alpine ski jump? How does the feeling compare to catapult takeoff?
user avatar
1 vote
2 answers
374 views

Is Assumed Temperature used in conjunction with a Derate in the B737 NG?

When using an Assumed Temperature for Takeoff, is it common operational practice to also use a Derate?
user avatar

1
2 3 4 5
9