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| IL-2 Sturmovik The famous combat flight simulator. |
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#1
12-10-2010, 03:26 PM
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However I see the color of exhaust here in DB. Interesting with which gazoline and settings for start  Becasue exaust color depending of many-many "settings".
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#2
12-10-2010, 03:29 PM
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#3
12-10-2010, 03:42 PM
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Oleg.....Spitfire flames in the dark and they are blue!! |
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#4
12-11-2010, 02:47 PM
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Cracking find. I searched for a clip like that, but found nothing. BTW, not all engines start the same. Here's a clip I found which makes me think that a night-time startup, if similar conditions were applied to a Spitfire, could be a really impressive pyrotechnic show! Cheers, MP
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#5
12-11-2010, 05:26 PM
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#6
12-11-2010, 05:52 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 05:59 PM. |
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#7
12-11-2010, 06:06 PM
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Lets not get too carried away... PLEASE -Watch the whole vid to see what happens as engine revs are increased and decreased.
Last edited by fireflyerz; 12-11-2010 at 06:10 PM. |
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#8
12-11-2010, 06:58 PM
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And a good point. It is important to note the engine RPM changes. When they occur, it affects how the fuel is burning in the engine. Variable and constant RPM's are two completely different processes happening inside the cylinder. In other words - when on constant RPM (provided we have the ideal mixture) the engine is burning fuel just like it should have, while with variable (changing) RPM the mixture and overall fuel burning process is far from ideal. i. e. - for the very same reason there are two different fuel consumption figures in cars: one for driving in a city where throttle changes are frequent and fuel consumption is higher, and another for highway driving where fuel consumption is much lower.
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#9
12-11-2010, 11:39 PM
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A red flame from a single stack at one stage I noticed. I was so glad when they turned the lights off. No illumination of the side panels at all really - maybe very slight at one point but just immediately around the stacks. Best video yet. Cheers Last edited by Sutts; 12-11-2010 at 11:44 PM. |
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#10
12-12-2010, 01:54 AM
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A leaner mixture will result in higher temperature (and higher power) - which results in flames on the blue side. A richer mixture will result in lower temperature - so the flames go to the orange/red side. In my experience with Cessnas, you would start the engine at full rich fuel mixture. I would think most engines would be started at full rich, and leaned afterward. In a new engine, this would probably result in yellow flames on startup. Once the engine is leaned, it would go toward blue. The only thing about these videos is they are showing old aircraft with old engines. I would suspect that the conditions of individual engines (even different cylinders on the same engine) and the fuel systems probably play into why some videos show a variety of colors. I would hope that different flame colors are modeled (blue - orange/red), depending on the engine conditions. |
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