Questions tagged [takeoff]
Takeoff is the first phase of flight, when an aircraft lifts off from the runway or other surface.
475
questions
25
votes
1
answer
7k
views
How can Ural Airlines fly an A320 from an unpaved field after an emergency landing?
Ural Airlines flight 1383 had to land in a field due to hydraulic problems and fuel shortage. The airline does not scrap it, but is repairing (source) and is going to fly it. A320 landing gear is not ...
- 995
12
votes
2
answers
3k
views
How should you deal with passenger throttle interference just after take-off?
I took a passenger on a flight recently in a C42, in which the throttle is placed between the legs. Shortly after take-off (I'm talking 100ft in the air at full throttle), the passenger tucked his ...
- 11.8k
2
votes
2
answers
207
views
Should you line-up the runway 90 degrees or follow the yellow marking?
I had a discussion with somebody recently. I prefer to do a 90 degree line-up on the runway, ensuring max take-off run available. (in GA airplanes...) However, somebody pointed out that one should ...
- 732
4
votes
2
answers
1k
views
Help me understand the A220-100 takeoff chart
Here is the takeoff performance chart of the Airbus A220 (CS100). According to Wikipedia, the MTOW runway length needed is 1500 metres. However, this chart seems to suggest that a runway length of ...
- 225
8
votes
4
answers
4k
views
Can you weld a propeller blade from 120 degrees to 180?
My uncle flew for Mission Aviation Fellowship (maf.org) for a university in Texas, and I believe that he was flying a Cessna to the Amazon (among other places). He actually knew Jim Elliot (who went ...
6
votes
2
answers
293
views
When does taxiing become taking off?
When there is a relocated runway threshold, the PHAK says:
When the threshold is relocated, the closed portion of the runway is not available for use by aircraft for takeoff or landing, but it is ...
- 10.9k
10
votes
1
answer
2k
views
How common is it to take off from a taxiway?
This question reminded me of a time when I landed my spamcan at a former WWII RAF base (middle of nowhere, no ATC, no-one in the clubhouse) that had a part concrete/part grass runway, a farmer came ...
- 2,536
5
votes
2
answers
458
views
Can I takeoff as VFR from class G with 2sm vis. even if that's IFR in the categorical outlooks?
Weather minimums for class G during the day (below 1200'AGL) are 1SM vis. and clear of clouds.
The categorical outlook (AIM 7-1-7) for IFR is 1sm to 3sm visibility and a ceiling of 500'AGL to 1000'AGL....
- 155
15
votes
5
answers
13k
views
Why wouldn't a plane start its take-off run from the very beginning of the runway to keep the option to utilize the full runway if necessary?
I was just watching BSL/LFSB on Flightradar24 and noticed that flight W67772 didn't start its take-off run from the end of the runway.
Wouldn't it make sense to start every take-off from the end to ...
0
votes
1
answer
249
views
Can you take off from a country road in a ultralight aircraft?
Can I take off from a country road in a ultralight aircraft (In the USA). I have seen resources online saying yes and no. Does it vary from state to state?
- 3
2
votes
1
answer
165
views
What's the effect of density altitude on take-off speed and acceleration?
For the EASA PPL(A)-exam I got the following question:
An increased density altitude has the following effect:
Increased take-off speed and decreased acceleration
Decreased take-off speed and ...
- 123
0
votes
0
answers
59
views
How to determine thrust and power requirements from take-off ground roll distance?
I'm working on a project which requires me to determine the power requirements of a propulsion system from a specific take-off distance. Starting with this equation:
$$
s_g\approx \frac{1.21(W/S)}{...
8
votes
1
answer
382
views
Why are bridles no longer used on carriers?
So, back in the day a lot of carriers had a "bridle" fitted onto the catapult. This was basically a V-shaped cable that attached to two points on the underside of a plane and would basically ...
- 307
2
votes
1
answer
228
views
Do the trim wheels on the Boeing 737NG move by themselves during the takeoff roll?
After the stab trim is set before take off, will it move by itself during the take off roll? If yes, why? Where can I find the reference?
- 21
0
votes
2
answers
179
views
Short Take Off and Landing, and Range
Can a plane have good range with a short take-off and landing (STOL) capability? If not, why. I have noticed STOL planes with lack the better good seat miles per gallon of planes that need longer ...
- 1,006
-2
votes
1
answer
57
views
Where to find generic weight take off charts for planes?
Where can I find a generic weight take off chart for planes? I looked online but maybe I'm not looking in the right place?
Related: How do I use the takeoff and landing distance charts in the C172 POH?...
- 1,006
11
votes
5
answers
3k
views
Buzz-saw noise from big turbofans at high thrust
This topic has been addressed many times on this and other forums. I have seen (and often not fully understood) some deep technical analyses, incuding manufacturers' research labs, since this is a ...
- 111
0
votes
0
answers
121
views
How to calculate take-off and landing distances for a light plane?
I cannot find a generic takeoff chart for the 850 lbs BD-5B Micro-plane. How can I find, generate, or calculate the takeoff and landing distances needed? I did find this chart below and included the ...
- 1,006
10
votes
6
answers
4k
views
Has a commercial aircraft ever taken off with its landing gear up?
In the extremely scientifically accurate movie Airplane the Autopilot takes off with the gear up.
Has this ever happened? Could any commercial or 4+ passenger GA aircraft do this, say with a 1%+ ...
- 413
19
votes
1
answer
2k
views
Why do helicopters experience a brief dip in altitude during IGE marginal power takeoffs?
The scenario is this: A helicopter is hovering IGE, and executes a marginal power takeoff. What causes the dip in altitude that occurs around 10 knots during the takeoff?
Most pilots seem to describe ...
- 193
1
vote
1
answer
614
views
What is considered a positive rate?
I'm a beginner pilot, and i am trying to perfect my takeoff. What vertical speed is considered a positive rate in a Boeing 747?
Thanks in Advance
- 11
0
votes
0
answers
101
views
TORA, ASDA, TODA with respect to FAA/ESEA take-off length requirements
In Boeing's 737 MAX Airplane Characteristics for Airport Planning document, the take-off runway lengths are defined for various aircraft and conditions. However, I cannot figure out whether these ...
4
votes
1
answer
483
views
Dash-8 Speed momentarily drops on takeoff
I was on a Dash-8 back in July and August. Looking at Flightradar 24, the speed is non constant and very choppy. It even goes down momentarily during the takeoff process. I believe that the Dash-8 ...
- 49
3
votes
2
answers
172
views
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 ...
- 2,049
13
votes
3
answers
2k
views
Why are the red/white control surfaces under the wing extended during a take off?
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 afterburner take off. Note ...
- 233
1
vote
0
answers
121
views
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
1k
views
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?
- 6,160
0
votes
0
answers
58
views
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?
- 2,101
1
vote
1
answer
5k
views
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 ...
- 11
3
votes
0
answers
191
views
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 ...
- 63
0
votes
1
answer
314
views
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.
- 25
10
votes
3
answers
8k
views
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?
- 133
11
votes
1
answer
2k
views
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.
...
- 425
5
votes
4
answers
969
views
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) ...
- 51
1
vote
2
answers
324
views
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 ...
- 11
1
vote
1
answer
239
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 ...
- 13
0
votes
1
answer
168
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
...
1
vote
1
answer
143
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 ...
- 111
3
votes
3
answers
276
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?
- 150
0
votes
2
answers
129
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, ...
0
votes
1
answer
544
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 ...
1
vote
1
answer
2k
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?
- 11
-1
votes
1
answer
332
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 ...
- 19
3
votes
1
answer
291
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 ...
3
votes
3
answers
2k
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; ...
- 1,389
-4
votes
4
answers
807
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 ...
- 4,162
9
votes
4
answers
496
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. ...
2
votes
5
answers
547
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.
...
4
votes
1
answer
690
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 ...
0
votes
1
answer
200
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 ...
- 583