wardialer
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Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 3:31 pm

Always wondered why I could not able to see the contrails from the window seat or even walking down to the back were I could see the behind of the engine? Why is that? On my recent trips to Europe it just dawned on me. And of course we were flying at above 25000 feet were most of the contrails begin to form at that point in altitude.
 
david b.
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RE: Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 3:39 pm

It depends on temperature, moisture, engine heat, power setting......ect

Where on the aircraft were you sitting? How hot was it that day?

Most likely to warm at 25000 feet.
Teenage-know-it-alls should be shot on sight
 
wardialer
Posts: 1141
Joined: Fri Sep 14, 2001 1:08 pm

RE: Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 3:54 pm

Well, I was sitting just slightly behind the wing. And the altitude we were flying at was mostly at 35000 feet and this was over the Arctic Basin coming from Frankfurt to Los Angeles. And getting some info from the Airshow Inflight System the outside air temp. was -58 deg.F
 
cdfmxtech
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RE: Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 3:57 pm

Alot of times, the contrails are further aft of the aircraft. The first time I noticed contrails was on a B747 from the R5 door, and I was looking really hard. It was barely noticeable.
Yes it depends on temps, but I think it can also depends on aircraft length as well. I might not be possible to really see contrails on a B737-500 since it is so short. But u might notice them just a bit on a B777/B747.

Check out the pic below, maybe you can see what I'm talking about


View Large View Medium
Click here for bigger photo!

Photo © Javier F. Bobadilla

 
Airbus_A340
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RE: Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 5:46 pm

The air coming out from the engine is heated and it takes time for the air temperature to cool and reach the condensation level, which is why the 'vapour trails' are not found directly behind the engine.

Trevor
People. They make an airline. www.cathaypacific.com
 
Ikarus
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RE: Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 6:15 pm

Well, you can see them. If you sit far enough behind the wing. There is just one thing you should remember: From far away these things look like bright white thin lines in the sky. When you're sitting beside one, it's a metre or more in diametre, and almost transparent. So what you can see is a semi-transparent flickering whitish area that isn't too noticeable. I've seen them when sitting in the last rows of 737-800s and of course A340s and 747s. Sometimes, when the light is right and reflects off them properly, they can actually be decently recognizeable.

However, because they flicker and are almost transparent, you will never be able to take a picture off them from the plane itself....

Regards

Ikarus
 
boeingnut
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RE: Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 10:13 pm

Ive seen the contrail from the a/c I was on once, and it was quite clearly visible, too! I was sitting in the last row of a SIA 744. This was in the middle of January, 2001 FRA-JFK, so over the Atlantic at 35,000ft was a tad bit chilly.
Excuse me, but what does God need with a starship?
 
D-aqui
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RE: Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 10:21 pm

On a recent flight from DUB to BRU on an Aer Lingus A321 I noticed the contrails starting towards the end of the fuselage. I was sitting in one of the back rows and actually turning my head to the rear. However, as other members have already pointed out, the possibility to observe this phenomenon from the plane depends on a number of environmental factors as well as flight parameters.

d-aqui
 
luzezito
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Joined: Mon May 07, 2001 11:46 pm

RE: Seeing Contrails Fron Inside A/C

Fri Dec 13, 2002 11:30 pm

Very often depending on the weather conditions and if you are flying over clouded sky with the correct angle of the sun you can see the shadow of the a/c and the shadow of the contrails as they form, although you cannot see the contrails themselves!
Quoniam Vita Brevis Est, Propera!
 
Guest

RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 1:02 am

Luzezito beat me to the point. It's frequently possible to see the contrail shadows in the cloud tops below the airplane. I've often wanted to ask ATC for a "360" on one of those days when contrails are prevalent, but alas, me thinks the boss would wounder what I was up to.

Jetguy
 
dc-10 levo
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RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 1:32 am

I flew MAN-MCO in 1999 on a Virgin 747 and I could just see them then - it was a great sight!

DC-10
 
XFSUgimpLB41X
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RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 1:43 am

That's what deadlegs are for, Jetguy.  Big grin
Chicks dig winglets.
 
mt99
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RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 2:35 am

I saw them!! on an IB A340 heading to ORD over Ottawa CA. Sitting @ almost last row. could clearly see a "cloudy" formations for the exhaut.. man i wished i could have stepped ot a few thousand feet away to see that!
Step into my office, baby
 
goboeing
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RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 9:53 am

I was on a British Airways 777 of the Atlantic en route from LHR to PHL and I could see our contrail starting to form. I was about 5 rows from the back.

Nick
 
BR715-A1-30
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RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 10:32 am

I tell ya, The best sighting I had was when we we flew by an AA 767 (They were going the opposite direction towards DFW) and the contrail we flew by was SPECTACULAR. This happened on June 10, on my way to ATL. It was kind of invisible until it had spread a little.
Puhdiddle
 
modesto2
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RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 11:14 am

I was on a United 744, SFO-LHR, and I could see the contrails out of the 5R door window.
 
POSITIVE RATE
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RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 1:55 pm

I was on a BA 747-400 LAX-LON and i could clearly see the contrails coming out of engines 1 and 2. I can't remember my exact seat but it was just behind the left wing. The contrails seemed to form a few metres behind the exhaust nozzles.
 
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Bruce
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RE: Seeing Contrails Fron Inside A/C

Sat Dec 14, 2002 5:09 pm

I have never seen the contrail itself from inside. However, on a Delta 757 flight from DTW to ATL, in January, over Ohio at cruise, I did see a spectactular shadow on the cloud below: our plane and a loooooooooong contrail. I did take a picture of it, but I dont have a scanner (that was on film, before I went digital). I'm looking at it now. very cool.

Check out this link. an A321 at probably 35,000 ft, and no contrail! how come?
http://www.pbase.com/image/5525899/original

feel free to check outthe rest of the gallery too  Big grin

bruce
Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
 
9V-SPJ
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RE: Seeing Contrails Fron Inside A/C

Thu Dec 26, 2002 1:08 pm

I was flying SQ 12 on my way to LAX, and from seat 54A, between SIN and NRT, I could see the contrails, if I turned my head so I was looking back out of the window. I could only see No.1 contrail though.

9V-SPJ
 
POSITIVE RATE
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RE: Seeing Contrails Fron Inside A/C

Thu Dec 26, 2002 3:28 pm

I think the cool thing when flying is to sport other airplanes leaving contrails whilst you are flying. Yesterday i flew Virgin Blue 737-700 SYD-ADL and i spotted 2 other a/c en-route leaving long contrails behind them. One of these a/c appeared to be at the same FL as us(FL400) and we actually flew through his contrail.

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