Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.
If we do not hit our goal we will be forced to close the site.

Current status: https://keepboardsalive.com/

Annual subs are best for most impact. If you are still undecided on going Ad Free - you can also donate using the Paypal Donate option. All contribution helps. Thank you.

https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.

Stupid Question Thread

scudzilla · 2010-05-16 18:54:15

I have a pretty stupid question about aircraft, i'm sure there's plenty of others out there who do too, maybe if tehy stuck them in here?? So here's mine When i look up to the sky and see a plane, sometimes it has a really long white cloudy line after it, other times it's a really short line (disappearing very quickly) and…

16-05-2010 07:54PM

#1

scudzilla

Registered Users, Registered Users 2 Posts: 12,012 ✭✭✭✭

Join Date: April 2007

Posts: 11394

I have a pretty stupid question about aircraft, i'm sure there's plenty of others out there who do too, maybe if tehy stuck them in here??

So here's mine

When i look up to the sky and see a plane, sometimes it has a really long white cloudy line after it, other times it's a really short line (disappearing very quickly) and other times there's not white cloudy line.

What is it? Is it something to do with the engines? Or Clouds?

0

Comments

#2 16-05-2010 07:59PM

Andrew33

Closed Accounts Posts: 1,853 ✭✭✭

Join Date: February 2010

Posts: 1748

If there's no contrails (the white streams) it's likely the aircraft is not high enough (and therefore the air's not cold enough) for the exhaust gases to freeze and condense into visible streams, I'd imagine the length of contrails is along similar lines, if the air is colder, the contrails will condense more and stay visible for longer or variable winds at high altitude will dissipate the contrails quicker sometimes.

0