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Aircraft Displays...."smoke"?  
User currently offlineJSC_23 From New Zealand, joined Jul 2001, 223 posts, RR: 0
Posted (11 years 11 months 3 weeks 5 days 3 hours ago) and read 2125 times:

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!
10 replies: All unread, jump to last
 
User currently offlineSaintsman From United Kingdom, joined Mar 2002, 2065 posts, RR: 2
Reply 1, posted (11 years 11 months 3 weeks 5 days 2 hours ago) and read 2111 times:

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.

User currently offlineL-188 From United States of America, joined Jul 1999, 29784 posts, RR: 58
Reply 2, posted (11 years 11 months 3 weeks 5 days 2 hours ago) and read 2102 times:

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.
User currently offlineSaintsman From United Kingdom, joined Mar 2002, 2065 posts, RR: 2
Reply 3, posted (11 years 11 months 3 weeks 5 days 1 hour ago) and read 2080 times:

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.

User currently offlineJwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 19
Reply 4, posted (11 years 11 months 3 weeks 5 days ago) and read 2077 times:

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
User currently offlineL-188 From United States of America, joined Jul 1999, 29784 posts, RR: 58
Reply 5, posted (11 years 11 months 3 weeks 5 days ago) and read 2071 times:

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.
User currently offlineAA_Cam From , joined Dec 1969, posts, RR:
Reply 6, posted (11 years 11 months 3 weeks 4 days 22 hours ago) and read 2056 times:

Is this the same with piston-powered display teams?

Cameron


User currently offlineFlightSimFreak From United States of America, joined Oct 2000, 720 posts, RR: 0
Reply 7, posted (11 years 11 months 3 weeks 4 days 11 hours ago) and read 2014 times:

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...

User currently offlineAA_Cam From , joined Dec 1969, posts, RR:
Reply 8, posted (11 years 11 months 3 weeks 4 days 11 hours ago) and read 2013 times:

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


User currently offlineJSC_23 From New Zealand, joined Jul 2001, 223 posts, RR: 0
Reply 9, posted (11 years 11 months 3 weeks 4 days 9 hours ago) and read 1990 times:

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!
User currently offlinePPGMD From United States of America, joined Sep 2001, 2453 posts, RR: 0
Reply 10, posted (11 years 11 months 2 weeks 5 days 15 hours ago) and read 1894 times:

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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