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Do Bae146 Pull Contrails?  
User currently offlineBa757gla From United Kingdom (Scotland), joined Mar 2006, 716 posts, RR: 2
Posted (3 years 8 months 1 week 1 day 10 hours ago) and read 1502 times:

i seen over my house high up opereting INV-LGW but noticed no contrail

19 replies: All unread, jump to last
 
User currently offlineStarlionblue From Greenland, joined Feb 2004, 13596 posts, RR: 68
Reply 1, posted (3 years 8 months 1 week 1 day 10 hours ago) and read 1495 times:

Contrails are more dependent on altitude and atmospherics than on the type of plane.


Tact Is For People Who Aren't Witty Enough To Be Sarcastic
User currently offline2H4 From United States, joined Oct 2004, 8139 posts, RR: 65
Reply 2, posted (3 years 8 months 1 week 1 day 10 hours ago) and read 1488 times:
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Quoting Starlionblue (Reply 1):
Contrails are more dependent on altitude and atmospherics than on the type of plane.



Indeed. An aircraft doesn't need to be turbine-powered to pull contrails:










2H4





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User currently offlineEMBQA From United States, joined Oct 2003, 8424 posts, RR: 19
Reply 3, posted (3 years 8 months 1 week 1 day 10 hours ago) and read 1488 times:

Quoting Ba757gla (Thread starter):
I seen over my house high up opereting INV-LGW but noticed no contrail

Any aircraft engine will... even piston if the conditions are right.


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineRedcordes From United States, joined Jan 2006, 245 posts, RR: 0
Reply 4, posted (3 years 8 months 1 week 1 day 9 hours ago) and read 1462 times:

The higher the humidity the more prominent and lasting the contrails are. When the weather starts to change from clear and dry to warmer and moister, the contrails gradually become more and more noticeable -- usually a couple days in advance.


"The only source of knowledge is experience." A. Einstein "Science w/o religion is lame. Religion w/o science is blind."
User currently offlineSlamClick From United States, joined Nov 2003, 9996 posts, RR: 79
Reply 5, posted (3 years 8 months 1 week 1 day 9 hours ago) and read 1460 times:

No. They don't have enough torque to pull the skin off a pudding.

Seriously: When I flew them they were restricted to FL300 or below (think that's the number) and if conditions were right as to temperature and dewpoint at that altitude, they would just like any other airplane.

Get up into the arctic and I suppose a helicopter would pull one.

Quoting 2H4 (Reply 2):

When I was a kid, whenever we saw a contrail it went from one horizon to the other. Years later I figured out why. They were recips we were looking at - jets were all military and rather rare. We were looking at B-29, B-36, B-50, C-124, C-97 and the airliners were Super Connies, B-377s and so forth. They would pull a con down in the mid to upper twenties where a jet might not because there was far more particulate matter in their exhaust, oil, soot, ring fuzz, bits of impeller seal, you name it.


Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offline2H4 From United States, joined Oct 2004, 8139 posts, RR: 65
Reply 6, posted (3 years 8 months 1 week 1 day 9 hours ago) and read 1453 times:
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DATABASE EDITOR




Quoting SlamClick (Reply 5):

Great story, Slam!

I gotta know...did you 146 pilots actually refer to the airplane as the "Quadrapuff"? That always made me laugh...  biggrin 




2H4





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User currently offlineEMBQA From United States, joined Oct 2003, 8424 posts, RR: 19
Reply 7, posted (3 years 8 months 1 week 1 day 9 hours ago) and read 1450 times:

Quoting SlamClick (Reply 5):
We were looking at B-29, B-36, B-50, C-124, C-97 and the airliners were Super Connies, B-377s and so forth.

Damb SlamClick..!! You are old..!!! LoL..


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineA319XFW From , joined Dec 1969, posts, RR:
Reply 8, posted (3 years 8 months 1 week 1 day 9 hours ago) and read 1447 times:

Do 4 APU's cause contrails? Big grin

I was on an EZY flight last week and for the first time actually saw the contrails starting outside of my window when I looked back. Would have made a great pic, but I didn't have a camera with me.
That was at FL390.

User currently offlineSlamClick From United States, joined Nov 2003, 9996 posts, RR: 79
Reply 9, posted (3 years 8 months 1 week 1 day 8 hours ago) and read 1424 times:

Quoting 2H4 (Reply 6):
did you 146 pilots actually refer to the airplane as the "Quadrapuff"?

Yes, and the quadraphonic leaf blower and the swineliner.

Because of the howling sound made by the flaps I called it "the hound of Hatfield" most of the time. After American tried stripping the paint off the ex-AirCal planes I referred to them as the "pewter pumpkin" because the skin would never buff out to anything like a shine.

But I did like flying the thing. It was slow, it didn't climb worth a damn and I guess they were expensive from a maintenance downtime standpoint but it was pleasant to fly.

The smallest jet I ever flew had four engines!


Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently onlineMir From United States, joined Jan 2004, 13168 posts, RR: 65
Reply 10, posted (3 years 8 months 1 week 23 hours ago) and read 1344 times:

Quoting SlamClick (Reply 5):
Get up into the arctic and I suppose a helicopter would pull one.

Hell, I saw some Warriors one winter in GFK that were pulling contrails on approach for landing.

The temperature that day? -44 (not sure whether C or F, but it didn't really matter - it was just f*#!ing cold.....).

-Mir


NaNoWriMo 2008 -- 51,156! Win!
User currently offlineStealthZ From Australia, joined Feb 2005, 4141 posts, RR: 53
Reply 11, posted (3 years 8 months 1 week 22 hours ago) and read 1344 times:
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Quoting Mir (Reply 10):
The temperature that day? -44 (not sure whether C or F, but it didn't really matter - it was just f*#!ing cold.....).

Doesn't make any real difference at all, -40C = -40F so -44 was almost the same thing!


Of course old planes are safe, how do you think they got to be old?
User currently offlineSlamClick From United States, joined Nov 2003, 9996 posts, RR: 79
Reply 12, posted (3 years 8 months 1 week 14 hours ago) and read 1325 times:

Quoting Mir (Reply 10):

Which pretty well puts GFK in the arctic that day. Nothing between GFK and the north pole but a barbed wire fency anyway.

I remember reading about Twin Otters flying out of Resolute near the magnetic north pole laying contrails on takeoff.


Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offlinePrebennorholm From Denmark, joined Mar 2000, 5126 posts, RR: 55
Reply 13, posted (3 years 8 months 1 week 9 hours ago) and read 1258 times:

When you burn one pound of fuel, then you always produce roughly 1.5 pound of water vapor.

It is only a question about temperature and relative humidity whether this produces contrails - condenses and freezes to ice crystals.

During this winter, which seems to never end, my car has produced a lot of contrails. The water vapor produced by the combustion condensed already within the cold exhaust tube.


Always keep your number of landings equal to your number of take-offs, Preben Norholm
User currently offlineOly720man From United Kingdom, joined May 2004, 4767 posts, RR: 12
Reply 14, posted (3 years 8 months 6 days 19 hours ago) and read 1174 times:



A FlyBe 146 over Barton


Man City p3 w3 d0 l0 f4 a0 P9 - hey it may never happen again!
User currently offlineSlamClick From United States, joined Nov 2003, 9996 posts, RR: 79
Reply 15, posted (3 years 8 months 6 days 17 hours ago) and read 1145 times:

Quoting Oly720man (Reply 14):

All right! The definitive answer.

Quoting Prebennorholm (Reply 13):
When you burn one pound of fuel, then you always produce roughly 1.5 pound of water vapor.

Some contrail, usually short, is formed by the pressure reduction over the wings dropping the temperature below the dewpoint. When the air mixes and "warms" back up to ambient they dissipate.


Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offlineBrendan03 From Australia, joined Aug 2005, 812 posts, RR: 2
Reply 16, posted (3 years 8 months 6 days 16 hours ago) and read 1123 times:

Damnit! I saw a picture of an A310 taking off at some artic field somewhere and it was producing a massive contrail... I thought it was on Airbus's website but I may have been mistaken...

(Or It could have been shown in the making of the A380 video)


This box does not contain Fish Sauce.
User currently offline2H4 From United States, joined Oct 2004, 8139 posts, RR: 65
Reply 17, posted (3 years 8 months 6 days 15 hours ago) and read 1117 times:
AIRLINERS.NET CREW
DATABASE EDITOR




Quoting SlamClick (Reply 12):
laying contrails on takeoff.

Here's a shot of an LC-130 at the South Pole doing the same:









2H4





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User currently offlineBri2k1 From United States, joined Dec 2004, 844 posts, RR: 4
Reply 18, posted (3 years 8 months 5 days 22 hours ago) and read 984 times:

Quoting Prebennorholm (Reply 13):
During this winter, which seems to never end, my car has produced a lot of contrails.

Keep it on the road, man! Big grin


Position and hold
User currently offlineBa757gla From United Kingdom (Scotland), joined Mar 2006, 716 posts, RR: 2
Reply 19, posted (3 years 8 months 4 days 20 hours ago) and read 901 times:

saww a bae 146 pulling contrails with inv-lgw

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