Questions tagged [takeoff]
Takeoff is the first phase of flight, when an aircraft lifts off from the runway or other surface
324
questions
0
votes
3answers
168 views
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.
...
0
votes
0answers
43 views
What wind speed is needed for vertical take offs in fixed wing planes? [duplicate]
Is there a scale or guide to see the vertical take off and landing head wind speed requirements for each plane? How is this calculated?
4
votes
1answer
282 views
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 ...
0
votes
1answer
68 views
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?
3
votes
1answer
251 views
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 ...
2
votes
1answer
136 views
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 ...
32
votes
8answers
8k views
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 ...
1
vote
1answer
118 views
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 ...
7
votes
4answers
434 views
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 ...
18
votes
2answers
2k views
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?
3
votes
1answer
117 views
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 ...
4
votes
2answers
324 views
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 ...
4
votes
2answers
107 views
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, ...
2
votes
1answer
204 views
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, ...
4
votes
2answers
651 views
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'...
5
votes
1answer
204 views
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 ...
13
votes
6answers
7k views
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 ...
5
votes
1answer
252 views
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 ...
0
votes
1answer
120 views
What flying boat has the highest maximum takeoff/landing sea state?
I assume that flying boats have limits on the sea states they’re certificated to take off and/or land in (for instance, hitting a ten-meter wave head-on in a five-meter wooden plane is probably ...
-1
votes
2answers
83 views
Why is trim for take off affected to Vmc(Speed maintain control)?
I am studying in Vmc part, but I have hard time to understand that trim for take off is affected to Vmc. How and why does it make Vmc speed increase?
6
votes
2answers
2k views
Why is autolanding ILS a thing, but not autotakeoffing ITS? [duplicate]
In this answer to the question of why zero-visibility landings are legal and routine but not zero-visibility takeoffs, the poster makes the following point:
When an aircraft lands in near zero ...
1
vote
1answer
88 views
Does heavy air pollution improve takeoff performance?
As you all probably know by now, aircraft have much better takeoff performance when and where the air is denser; this is why flights need to either use longer runways or jettison passengers and cargo ...
5
votes
2answers
599 views
Why would one want to slow to V2 following an engine failure during takeoff?
Reading about the crash of American Airlines Flight 191, the proximate cause of the final loss of control was the pilots' reduction of the aircraft's airspeed to V2, in compliance with the published ...
3
votes
2answers
228 views
How do I translate this propeller start procedure into English?
I'm translating a documentary from Hungarian to English. There is a scene where the pilot of an aeroplane with a propeller is preparing for take-off.
He says (seemingly into a 2-way radio) two short ...
17
votes
3answers
6k views
How does the F-35B not flip over during transition?
As the engine nozzle rotates, the lift-fan cannot. Wouldn't this imbalance of moments around the center of gravity result in the F-35 pitching up onto its back?
As can be seen at 5:14 in this video: ...
6
votes
4answers
530 views
Why do heavy departures wait 5-10 minutes on the runway at ZRH?
I'm frequently travelling to Zürich for business and I usually make my schedule so that I have at least an hour to do some planespotting and photographing at the ZRH airport.
Whenever I came to the ...
1
vote
4answers
286 views
How is vertical speed managed in Airliners? [duplicate]
When an Airplane starts to take off, the Horizontal velocity would generate it the necessary lift, and then Airplane pitches up to further increase the lift. As the Airplane is climbing up, the net ...
0
votes
3answers
783 views
Why is this video of a G36 Bonanza taking off so scary?
Why is this video of a G36 Bonanza so 'scary'?
If they had clipped the top of the trees, would it really have brought the plane down? (And even if yes, it looks pretty ...
1
vote
0answers
104 views
How does wind affect takeoff weight limits?
Two days ago I took off from BUR in relatively windy (although dry) conditions. Flightradar showed departure from runway 33, and winds were recorded roughly mid 20s kts from the N-NNE direction. ...
1
vote
1answer
107 views
Is there a maximum horizontal acceleration for passengers?
Are there any regulations regarding the maximum acceleration forces that passengers should experience during takeoff/flight/landing?
Or what would be considered to be an acceptable horizontal ...
-2
votes
4answers
244 views
Could an airplane takeoff with a very strong tailwind if its propeller blades are set to a negative pitch? [closed]
Would it be possible for an airplane to accelerate and takeoff with a very strong tailwind if its propeller blades are set to a negative pitch?
For example, let's say that a hurricane was approaching ...
2
votes
1answer
180 views
What was the airline attendants looking at in LED display before light off in A320 [closed]
I was journeying on Indigo Pune-COK back and forth. At both the times, I noticed airline attedants looking at some LED display which seemed to be some sort of balance scale. At first, I thought they ...
0
votes
3answers
330 views
What makes an airplane STOL?
I watch STOL pilot champs Zenith CH701 here.
The engine power are: 130 HP, 80 HP, 120 HP and 100HP, respectively. Amazing. As per my observation, the third airplane ...
2
votes
3answers
294 views
Has using engine exhaust blown onto an airfoil ever been tried to make an vtol aircraft?
Has usong engine exhaust blown onto an airfoil ever been tried to make a vertical takeoff and landing aircraft?
2
votes
1answer
63 views
Learn in-depth about airplane operations [closed]
Currently seeking a book or manual that teaches a civilian how a cargo aircraft operates and what it's pilots do, say a 787. Preferably a high-level overview at a per flight phase:
Pre-flight: Flight ...
1
vote
0answers
152 views
How are the takeoff V speeds calculated? [duplicate]
What is the actual formula for calculating the takeoff V speeds of an aircraft with any configuration? Specifically, I mean V1, Vr and V2
I know there are many factors, but what are they specifically ...
1
vote
1answer
425 views
How can I figure out the take-off minimum when multiple minimums are listed in the TPP?
For example:
If the published take-off minimum depicts:
Standard with minimum climb of 565' per NM to 2800, or 1000-3 with
minimum climb of 370' per NM to 2800, or 1500-3 for climb in visual
...
1
vote
1answer
193 views
What are the takeoff and landing distances of motor gliders?
I'm doing some estimations of weight and thrust loading for a college project, and in the formula below the landing distance is not a variable, but should be estimated using similar aircraft and usual ...
-11
votes
6answers
540 views
How much can I exceed crosswind limits by? [duplicate]
I'm learning in a Tomahawk. They have a maximum demonstrated crosswind component of 15 knots. My school has a limit of 12 kt, but will only allow students to fly in 50% of that, so 6 kt.
Since it's ...
2
votes
2answers
3k views
How long does a runway have to be for an Airbus A380 to takeoff?
I have seen several Airbus A380's takeoff on large runways, but how small can a runway get for an Airbus A380 to takeoff fully without overrunning?
1
vote
2answers
163 views
How to calculate the amount of weight my plane can takeoff with?
This is how I approached this problem-
My takeoff run is limited. So, depending on my configuration I calculated the maximum possible velocity I can attain in my groundroll. I assumed that at the end ...
1
vote
5answers
259 views
Does headwind on takeoff affect g force?
I'm aware that headwind or tailwind does not affect rate of climb or descent but only the angle. I'm not sure if it affects the g force or not. I'd assume it affects g force because using trignometry, ...
6
votes
3answers
2k views
Why did this 737 not take off on first attempt?
This video shows a 737 'near miss' takeoff. I'm curious as to why the aircraft did not take off as expected, i.e. is there anything obvious from the video?
I'm assuming the speed and payload would ...
0
votes
2answers
240 views
How do I calculate FPNM for standard take-off minimums?
I have trouble understanding and calculating FPNM for standard take-off minimums.
As I understand, the formula is: (Ground speed)/60 * FPNM = FPM
Let's say the ODP says:
565' per NM to 2800, or ...
6
votes
1answer
478 views
What is this 'runway number' automatic readout system on a flight deck?
I was watching this flight-deck video (starts at 11:13) of a Turkish Airlines Boeing take off from Istanbul and just as they accelerate on the take off roll there seems to be an automatic voice in the ...
7
votes
6answers
3k views
Is it okay to take off with weight more than the POH max gross weight?
I wonder if I could take off with weight more than the gross weight stated in the POH of my aircraft as long as I take off with a higher speed?
I think I have done it once by mistake.
26
votes
3answers
4k views
Why would a turboprop rev down just before going full throttle during takeoff?
The only turbprop I've travelled is the ATR 72. I've noticed that the props' rev go down (for like a second, the sound also goes down) just before engaging full throttle in order to takeoff. I've ...
1
vote
2answers
123 views
What does LNAV engagement exactly mean?
I notice the term LNAV engagement being frequently mentioned in aviation related discussions or in several FAA's relevant material. Take, for example, this quote from Order 8260.58A (PBN Instrument ...
4
votes
2answers
93 views
Under what circumstances can the Initial Climb Area extend more than 2 nautical miles?
While studying of FAA's Instrument Procedures Handbook, I noticed that on page 1-16 (Chapter 1: Departure Procedures) it defines the Initial Climb Area (ICA) as follows:
The ICA is the segment of ...
3
votes
2answers
290 views
gear down during takeoff for extended period of time
Normally when an aircraft departs, the landing gear is retracted shortly after the aircraft is airborne. While watching aircraft departing from an airport in my city, I noticed, that occasionally the ...
