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#1
12-11-2010, 06:52 PM
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Oleg,
In terms of the initial startup flames I think you have the perfect colour already, no more red required. I attach comparison shots from the previously posted P-51 Old Crow startup against the flames in your video. You have them spot on I think. Once the engine is running it looks like red/blue is the expected colour though. I haven't seen any yellow flames from a running engine yet and the colour chart previously posted only mentions yellow flames when the spark plugs are defective. Would be nice to occasionally see the large lazy flames caused by an overpriming stack fire too. Thanks 
Last edited by Sutts; 12-11-2010 at 06:59 PM. |
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#2
12-10-2010, 04:29 PM
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Hello Oleg!
If there is a program managing each exhaust pipe individually, could it be possible to expand it in order to make the exhaust flames yellow + puffs of black smoke + irregular firing tending quickly toward blue + no smoke (or slight stream of translucid grey), as Wutz video shows? Exhaust flames at high RPM were indeed blue (assuming the pilots were managing mixture, which was generally the case!) JVM |
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#3
12-10-2010, 04:36 PM
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Agree that most accounts I've read also mention intercepting at night by spotting blue flames.
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#4
12-10-2010, 11:17 PM
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Quote:
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#5
12-10-2010, 11:19 PM
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Engine Flame & Smoke effects demonstration
Sorry Oleg, had a spare hour this afternoon and a new add-on for an old sim, and just couldn't resist...
Last edited by baronWastelan; 12-10-2010 at 11:27 PM. |
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#6
12-11-2010, 05:02 AM
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A special query
Hi Oleg,
I dont know where to post this query First post got lost in last week update Thank for the tip ( from a kind chap )to repost early in the new update so it will be seen ... Sorry if I am out of place , QUERY: I am finishing a FFB firmware project and I would like to know if BOB 's FFB handling will be compatible with the Microsoft FFB stick on which my firmware is based. I am only using the "Spring" feature , The most important one ... Thank you gb |
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#7
12-11-2010, 01:58 AM
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Quote:
I recall i did that after transplanting a 2 litre Ford engine in my little Mk2 Escort. Drove it around for a bit with no bonnet/hood and no engine pipe. Sounded like a demon on a short chain, although when i got back i realized i'd burnt pretty much everything off that side of the engine bay.  Aah good times. |
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#8
12-11-2010, 02:28 AM
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It's lucky we've got so many experts on this forum especially in the field of chemisty. I on the other hand have only the basic high school level.
If you look at the first minute of so of this video, you'll see the flame changing colour due to the mixture of the fuel and air being burnt. If there is exess fuel in the mixture it will be a highly visible yellow flame, if it's the mixed fuel/air at the correct ratio it will be blue but almost invisible. In Olegs video we a an engine that has just been started. From the video shown the engine is barely ticking over. Now the merlin engine had what's called a high overlap cam shaft, which means that the inlet and outlet valves are open at the same time for a long time durring the otto cycle. (It allows fresh fuel air mix to enter the combustion chamber at the same time as the last of the exahust gasses leave the combustion chamber.) This makes the engine more efficient within the engines power band BUT at low revs the engine engine runs rough due to incomplete burning of the fuel air mix in the combustion chamber. It's what known as a 'Lumpy Cam' in automotive circles. It means at low revs there is a lot of unburnt fuel in the exhaust gasses. Now I know some people here want Oleg to demonstrate a 'Blue Flame' in an update video. I for one, most emphatically, do not want to see this! Cheers!
Last edited by Skoshi Tiger; 12-11-2010 at 02:32 AM. |
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#9
12-10-2010, 04:21 PM
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Very nice update! Videos are always so much more than still pictures..
Yeah, maybe a little too yellow.. should it not be more white rather than redish? [EDIT] ok.. after seing Wutz vid of the DB.. (I wasn't way off with "more white") I change my mind to whitish-blue
Last edited by F19_lacrits; 12-10-2010 at 04:24 PM. |
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#10
12-10-2010, 04:24 PM
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I would go more with Blue...
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Hybrid Mode
