2006-09-21 07:27:29 · 11 answers · asked by Leo 1 in Science & Mathematics ➔ Physics
Jets ARE airplanes.
The difference with a jet at cruising altitude is that, that far up, the air is very cold and the exhaust condenses quickly, leaving a white trail. This doesn't happen at lower altitudes, even with jets, because the air is too warm.
http://en.wikipedia.org/wiki/Contrail
2006-09-21 07:29:48 · answer #1 · answered by Anonymous · 0⤊ 0⤋
in many circumstances what you word isn't smoke. that's water vapor. "Smoke" ability unburned gasoline - like once you've a campfire and the timber would not burn 100% and the little debris of timber bypass floating off - you word them as smoke. in case you position some thing interior the way of the smoke (like say, a pot on the fireplace) it collects distinct the unburned carbon debris and receives all grimy, proper? ok, so if a plane engine is suitable adjusted, it received't leave a lot gasoline unburned. which could be wasteful. you may see slightly smoke at the same time as the plane is placing out if the pilot is truly blasting gasoline into the engine. once you word a plane up very severe leaving a white path behind, it truly is not any longer smoke. that's water vapor - talked about as a "contrail". Water vapor comes out of all engines that burn gas (or similar fuels) - it truly is because the gasoline incorporates hydrogen atoms, and once you burn hydrogen you get water as a waste product. So, in case you burn a ton of hydrogen on your engine, you get about ten a lot of water popping out the exhaust!!! if you're in a warmth position close to to the floor, the water vapor will be invisible, yet when you're severe up the position the air is fairly chilly, then the water vapor will style little snow crystals in some seconds after it comes out of the engine, and also you word a white path. How lengthy the course lasts relies upon on the temperature of the air, how severe the plane changed into, or maybe if the wind is blowing to split out the little water crystals. We used to imagine that this didnt reason any damage to the air, yet now we arent so confident. there is a few reason to trust that that's causing damage to the earth. more advantageous study is critical to ascertain if having maximum of those severe flying planes is an outstanding idea or no longer!
2016-11-23 13:20:40 · answer #2 · answered by rosenberg 4 · 0⤊ 0⤋
Visible exhaust is due to water vapour condensation.Jet aircraft envelope does not exceed an altitude of 5000 ft. Where as an airplane flies at altitudes of 35000ft. Also due to speeds and economy required an airplane has complete combustion of fuel with hardly any water vapors. This is not so in jet aircraft due requirement of speed and maneuverability requirements.
2006-09-21 07:36:35 · answer #3 · answered by openpsychy 6 · 0⤊ 0⤋
If you are referring to a contrail, then any airplane jet or propeller can form contrails if the conditions are right.
If you happen to see any film from WWII you will see propeller driven bombers also making contrails. Their exhausts contain water vapor just as just engines do.
It is also possible for contrails to form just from the agitation of the air by the planes wings. If the air is supersaturated with water vapor, the turbulence caused by the wings can cause ice crystals to form and product contrails.
I realize this is not the popular version but those of us who were around during WWII remember the news reels of 100's US bombers streaming contrails on their way to Germany.
2006-09-21 14:42:46 · answer #4 · answered by oil field trash 7 · 0⤊ 0⤋
It's not smoke, it's called a contrail. A high flying jet's engines pass through very cool air and superheat it. It's a vapor plume. Sort of like how you can see your breath on a cold day.
2006-09-21 07:30:22 · answer #5 · answered by Anonymous · 1⤊ 0⤋
a jet engine needs oxygen, which it gets by sucking in air and churning it around, then expelling the waste out of the rear. Hence jet-trails.
2006-09-21 07:30:40 · answer #6 · answered by warped_factor_ten 2 · 0⤊ 0⤋
what you see is not actually smoke in the jet trail but condesnsed water vapors....long clouds essentially caused by the extreemly hot jet exhaust....planes don't superheat the air like jets du hence no vapor trail.
2006-09-21 07:29:45 · answer #7 · answered by BOISE_DD 3 · 1⤊ 0⤋
it is not smoke it is vapour when a plane is flying 6 miles up from the ground
2006-09-21 07:36:30 · answer #8 · answered by Edward B 4 · 0⤊ 0⤋
diffrent fuels and diffrent concentrations. Also depends on the mechanics and how they are engineered to run.
2006-09-21 07:29:58 · answer #9 · answered by aflownes 2 · 1⤊ 0⤋
Vapor Trail. 1st poster has it right.
2006-09-21 07:34:58 · answer #10 · answered by Special Ed 5 · 0⤊ 0⤋