JSC_23
Topic Author
Posts: 214
Joined: Fri Jul 20, 2001 8:50 pm

Aircraft Displays...."smoke"?

Mon Jul 22, 2002 7:10 pm

How at airshows and air displays do the aircraft produce that "smoke" trail behind them as illustrated below.

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Photo © Glenn Alderton
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Photo © Joan Martorell


And does this have a techinical name...or at least other than smoke?

Thanks in Advance,
JSC_23
Be a realist...Remain a dreamer!
 
saintsman
Posts: 2037
Joined: Fri Mar 15, 2002 12:34 am

RE: Aircraft Displays...."smoke"?

Mon Jul 22, 2002 7:45 pm

Display aircraft usually have a tank that holds coloured diesel, which is injected into the jet exhaust. Quite often you can smell it at airshows although I'm not sure if the diesel actually burns it obviously gets hot enough to produce smoke.
 
L-188
Posts: 29881
Joined: Wed Jul 07, 1999 11:27 am

RE: Aircraft Displays...."smoke"?

Mon Jul 22, 2002 7:49 pm

Actually they don't use diesel.

It is usually vegatable oil or peanut oil.

Less harmefully to the fishies and the plants.
OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
 
saintsman
Posts: 2037
Joined: Fri Mar 15, 2002 12:34 am

RE: Aircraft Displays...."smoke"?

Mon Jul 22, 2002 9:08 pm

According to the RED ARROWS web site they use Diesel http://www.raf.mod.uk/reds/faqs.html#faq8. They claim it is harmless but a vegetable oil does seem to make sence too.
 
jwenting
Posts: 9973
Joined: Mon Apr 23, 2001 10:12 pm

RE: Aircraft Displays...."smoke"?

Mon Jul 22, 2002 9:23 pm

It used to be diesel. Many display teams are now switching to vegetable oil because it is cheaper and has less environmental impact.
Diesel is still used by some teams. Either the equipment needed is different or not all colours can be produced using vegetable oil.
I wish I were flying
 
L-188
Posts: 29881
Joined: Wed Jul 07, 1999 11:27 am

RE: Aircraft Displays...."smoke"?

Mon Jul 22, 2002 9:25 pm

Actually you can tune a diesel engine to the point that it will run on Veggie oil.
OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
 
Guest

RE: Aircraft Displays...."smoke"?

Mon Jul 22, 2002 11:15 pm

Is this the same with piston-powered display teams?

Cameron
 
flightsimfreak
Posts: 698
Joined: Sun Oct 29, 2000 9:36 am

RE: Aircraft Displays...."smoke"?

Tue Jul 23, 2002 10:49 am

Yeah... they drop it on the tail pipe of piston aircraft... I actually asked a pilot and he said they have a special kind of aeroshell that is called smoke oil...
 
Guest

RE: Aircraft Displays...."smoke"?

Tue Jul 23, 2002 11:01 am

That's awesome, so wait..

Do they inject it into the exhaust stream or just "drop it" onto the external part of the pipe?

Cameron
 
JSC_23
Topic Author
Posts: 214
Joined: Fri Jul 20, 2001 8:50 pm

RE: Aircraft Displays...."smoke"?

Tue Jul 23, 2002 1:00 pm

Thanks guys,
Yeah I heard it was something like that I just needed to confirm it...as I'm actually doing a speech at school on the RNZAF skyhawks (the top two pictures above)
So does anyone know a different name for it?

Regards JSC_23
Be a realist...Remain a dreamer!
 
PPGMD
Posts: 2398
Joined: Sun Sep 30, 2001 5:39 am

RE: Aircraft Displays...."smoke"?

Mon Jul 29, 2002 6:45 am

It's injected with a small pump and a nozzle into the exhaust of the aircraft.

Also yes, most in the states is made by aeroshell, and they are mostly veggie oil.
At worst, you screw up and die.

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