Tornado Burner's.
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Join Date: Feb 2003
Location: Scotland
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Tornado Burner's.
Hi all,
Have seen quite a few ignitor problems over my time photographing the Tornado but not seen this before,curious as to the reason behind it. Is it to burn off excess oil?
Failed burner ignition
Normal burners
Why? Quite a sight....
Some great light today,a couple others.
As I said just curious about the burner problem.A glorious day at Tonkatown North.
Ranger
Have seen quite a few ignitor problems over my time photographing the Tornado but not seen this before,curious as to the reason behind it. Is it to burn off excess oil?
Failed burner ignition
Normal burners
Why? Quite a sight....
Some great light today,a couple others.
As I said just curious about the burner problem.A glorious day at Tonkatown North.
Ranger
Join Date: Jan 2008
Location: Norfolk
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Tornado pix
I have no clue re the smoke but I do know a superb photograph when I see one (or several in your case) and I just wanted to acknowledge same, especially the final one in your post.
Thanks,
Eagle402.
Thanks,
Eagle402.
Join Date: Dec 2000
Location: Horsham, England, UK. ---o--O--o---
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So what you're saying is that Tonka is in need of a decoke or someone forgot to offset their CO2 emissions! Ha 
Join Date: Jan 2008
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Typically a blocked hot-shot injector due carbon build up. No lightup - Fuel flow goes in unburnt and gives the smoke until pressure ratio hits limit and reheat cancels.
The reheat goes through all the light up procedure, even if it doesn't light, until the pressure ratio across the turbine reaches a set level monitored by the P2/P4 Fluidic Flip-Flop (which corresponds to a certain nozzle position) when the system automatically cancels reheat and puts the nozzle back to the dry position. That way the engine will give the best thrust it can rather than the reduced thrust because of the open nozzle. 
The cure used to be to clean the hot-shot injector in-situ by rotating an old speedo cable in the injector fed along the feed pipe - it's very well hidden when it's in place.
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Odie,
The old 'Speedo Cable' trick is barely used now, and there is a specific RR MAGERD kit for the job.
It is basically a baffled pipe that is vented to Atmos which screws onto the Hot Shot ignitor in place of the fuel pipe, and the engine is then run at Max Dry for a few minutes. This reverse purges the ignitor, and is a pretty effective way of cleaning the ignitor. The trouble with the speedo cable method, is that it used to eventually knock the tip off the ignitor, with the associated FOD problems!!
As you quite rightly say, in the event of a non-light up, the Working Line Limiter will then cancel the nozzles to Normal Dry Range, once the Nozzle position (Aj) has reached 70 - 75% with no pressure increase in the jetpipe.
Cheers,
Flipflopman
The old 'Speedo Cable' trick is barely used now, and there is a specific RR MAGERD kit for the job.
It is basically a baffled pipe that is vented to Atmos which screws onto the Hot Shot ignitor in place of the fuel pipe, and the engine is then run at Max Dry for a few minutes. This reverse purges the ignitor, and is a pretty effective way of cleaning the ignitor. The trouble with the speedo cable method, is that it used to eventually knock the tip off the ignitor, with the associated FOD problems!!
As you quite rightly say, in the event of a non-light up, the Working Line Limiter will then cancel the nozzles to Normal Dry Range, once the Nozzle position (Aj) has reached 70 - 75% with no pressure increase in the jetpipe.
Cheers,
Flipflopman
Join Date: Aug 2000
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Something worse than a burner blow out I think.
Picture 1 shows a classic burner blow out as subsequently described but the ac is on the threshold.
In pics 3 and 4 the ac is on the taxiway still belching smoke, i.e not a burner blow out which has cancelled correctly to dry range nozzles. Could the reheat fuel still be pumping into the nozzles?
I (we) should really get out more.
Ray
Picture 1 shows a classic burner blow out as subsequently described but the ac is on the threshold.
In pics 3 and 4 the ac is on the taxiway still belching smoke, i.e not a burner blow out which has cancelled correctly to dry range nozzles. Could the reheat fuel still be pumping into the nozzles?
I (we) should really get out more.
Ray
