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Nairaland Forum / Nairaland / General / Travel / This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) (53166 Views)
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Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by babz11(m): 11:11am On Nov 16, 2018 |
The white line that we see from our houses, or in fact not just from houses, but the anywhere on the ground, are not from a rocket, but from a commercial jet aircraft. These may be: Contrails (Condensation Trails), and Wing tip vortices Read on to know the simple details of what they actually are. 1. Contrails: The aircraft that we see in the sky leaving that white line are in most cases, flying at an altitude of more than 25,000 feet. The atmospheric temperature drops as we go higher (The same reason that tall mountains are freezing). It is, on average, is -35 deg Celsius. Just imagine, what will happen if you put a glass of water in your refrigerator ehich has a temperature of -0.18 deg Celsius. The aircraft engines produce exhaust by burning hydrocarbon fuel (High grade kerosene) . All such fuels on burning, produce water vapours too. On getting exposed to such freezing temperatures, the hot vapours cool down and condense into water droplets or may be into ice crystals sometimes, creating thw white line effect. 2. Wing Tip Vortices: These are more of a physics thing. The very reason that the aircraft flies is responsible for these tip vortices (Singular: Vortex). The reason is lift. The wings of aircraft are subject to lower pressure on the upper surface, and high pressure on the lower surface. This causes the air from the bottom surface to leak to upper part from the end part of the wing called the wing tip. This air lelakage creates a circular cyclone like structure called a vortex (The one you might have made in a bucket using your hand by moving the water in circular fashion). These also cause resistance to aircraft forward movement and is a cause of induced drag. The pressure due to the speed of the wind in this circular structure drops to a very low level, reducing the effective dew point of that region. This causes the air, which contains water vapours, to liquify or freeze, making them visible as white lines. They may not be visible everytime, but only in favourable conditions. However, they are always present. They can be reduced by using verticle smaller wings at the tip of the wing called winglets. Am a student pilot stop telling us sheet here |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by ayeniblessing(m): 11:12am On Nov 16, 2018 |
[quote author=Hotfreeze post=73014236]White clouds behind airplanes aren't fuel, don't let the OP mislead you. Op is right |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by brightalo17: 11:32am On Nov 16, 2018 |
So plane will open it's yansh and be dumping fuel on air ? I find this very hard to believe . 1 Like |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by esun1: 11:33am On Nov 16, 2018 |
why would landing weight be more than take off weight when some fuel has been burnt before the emergency landing location has been gotten to, or do passenger weight increase during the flight |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by Nobody: 11:38am On Nov 16, 2018 |
TechCapon: Stop misinforming pple. D consumption of fuel by d plane's engine is enough to reduce its weight. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by MollyBank: 11:44am On Nov 16, 2018 |
XD3G: What is the misleading information there? You mean fuel dumping doesn't exist? I have known about fuel dumping since I was a kid. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by Nobody: 11:47am On Nov 16, 2018 |
IbrahimDamola:nope on urs mumu |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by poiZon: 12:02pm On Nov 16, 2018 |
Imortal001:please explain what dumping means. u know we hv plenty buharists here. use picture where necessary |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by ferhyntorlah(f): 12:21pm On Nov 16, 2018 |
Kessykelly: I'm a lady and I read it. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by balancediet(m): 12:28pm On Nov 16, 2018 |
Bro. Sam der is bible study in de evening sammysammy111: |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by Kadri4(m): 12:42pm On Nov 16, 2018 |
festyese:The white smoke is not fuel dumping, it is called condensation trails(contrail). The main cause of this is the pressure and temperature difference between the engine exhaust and the atmospheric condition 1 Like |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by otabaotaba: 12:56pm On Nov 16, 2018 |
A very great lecture I will never forget, it took 31 years of my life to understand that what we use to call ' sign that rocket has passed' when we see that white line on the sky is not but only fuel dumping. Chaiii my father where are u, u have been decieving me since. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by odutolu1(m): 1:09pm On Nov 16, 2018 |
TechCapon: bullshit. crap |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by majamajic(m): 1:12pm On Nov 16, 2018 |
the white lines are from the exhaust of the plane going through or coming out of a thick cloud, that's when u see those white lines, if a plane dumps fuel it's invisible !!! |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by skykenny: 1:20pm On Nov 16, 2018 |
Our local airlines will never dump their fuel for any reason. Aah! to incure loss? The pilot must land the aircraft like that o. Anything wey go happen make e happen even if it's an emergency landing. Pilot dump the fuel & pay for the lost. Wait o. That man at the LHS of the 2nd pics, na Obama brother? |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by Brainardc(m): 2:11pm On Nov 16, 2018 |
Quite informative....... wow!
never knew about it until now #thanks |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by khalidx: 2:13pm On Nov 16, 2018 |
this post is totally misleading . lalasticala this is contrail o |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by majamajic(m): 2:25pm On Nov 16, 2018 |
otabaotaba: now u are deceiving yourself , the white lines are not fuel dumping lines, instead it's when the plane exhaust pipes pass through a thick cloud on coming out u see those white lines, especially on a sunny afternoon, or if the plane is on a sunny side while u are on a bit sunsetting side , |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by 042rep(m): 2:44pm On Nov 16, 2018 |
Misleading post... GrandMufti:Op please stop saying what you don't know.. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by akilo1: 3:32pm On Nov 16, 2018 |
What of if landing weight is still hire after dumping fuel ,what will the pilot do?to dump passenger? |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by DrMeroThaEmperor(m): 3:35pm On Nov 16, 2018 |
Pregnant women who are almost due are not allowed to board a long-distance flight. I think this post is not well researched. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by counta23: 4:17pm On Nov 16, 2018 |
dadalicious:You are correct. It could also be a jet. "Jets leave white trails, or contrails, in their wakes for the same reason you can sometimes see your breath. The hot, humid exhaust from jet engines mixes with the atmosphere, which at high altitude is of much lower vapor pressure and temperature than the exhaust gas." Source: Why do jets leave a white trail in the sky? - Scientific American https://www.scientificamerican.com/article/why-do-jets-leave-a-white/ |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by benjanny(m): 4:31pm On Nov 16, 2018 |
Thank you for this,I learn a new thing today |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by olaoye15(m): 6:57pm On Nov 16, 2018 |
dadalicious: You absolutely spoke my mind. Thanks for the piece OP. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by Ranchhoddas: 7:15pm On Nov 16, 2018 |
festyese: |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by liyahwillie(f): 7:45pm On Nov 16, 2018 |
nice one I learnt something new |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by Samfigo1(m): 9:07pm On Nov 16, 2018 |
dadalicious: You must be from Ibadan like myself dadalicious: You must be from Ibadan like myself |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by Lokoyen(m): 11:09pm On Nov 16, 2018 |
Hotfreeze: Point me to a thread you create with facts to negate what this op posted and stop talking none sense. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by Flypep: 11:27pm On Nov 16, 2018 |
This is well garnished but total crap and lies. Please get professional inputs and stop spreading falsehood. Read up wing tip vortices and cirrus clouds. |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by inereunwa1(m): 6:27am On Nov 17, 2018 |
overdrive:ta who tell you?? is she not a customer?? customers are always right |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by XD3G: 9:32am On Nov 17, 2018 |
MollyBank: Hi Mate, there is Fuel Dumping quite all right, but the height at which the dumping is done, it will not be visible to the eyes from ground Zero. What is misleading here is calling ConTrail, Fuel Dumping. This information is capable of causing unnecessary panic, hence, why i suggested OP's arrest. Good morning |
Re: This Is The Major Reason Why Pilots Dump Fuel Before Landing. (PHOTOS) by XD3G: 9:35am On Nov 17, 2018 |
Flypep: It's unfortunate how easily it has become, to disseminate a false information |
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