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Old 12-14-2010, 05:33 AM
Chill31 Chill31 is offline
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Join Date: Jan 2010
Posts: 9
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Oleg,

If you havent already recieved enough info at this point, I want you to know that the flame color coming out of the exhaust of a running engine like that would be more blue! than red or yellow. The flame is burning hot and mostly clean, so it comes out with a nice blue flame at night. In the day, you wont see it.

On engine start, the only time you will get the yellow/orange flame out the exhaust is if the engine is too rich and it spits out unburnt fuel that burns exiting the exhaust stack. In that case you will get a lot of orange/yellow fire coming out for a short time. I was on the wing of a P-51 when that happened and it does get warm...

Note: its easiest to over prime with the electric fuel pumps found on P-51s and the like.

*edit The short stacks in most of the videos lets you see a lot of blue flame...more than if the full length stack was in place. If you leave the exhaust as is with no blue, you really will be misrepresenting the way exhaust looks coming out of the stacks at night...


This video (previously posted) shows what I would expect to see coming from the exhaust at high power settings at night...see it at 0:30 video time


This video shows over priming at about 5:30. His first couple of attempts to start were underprimed and he didnt keep it running with additional priming.

Also, when you go from high power to low power rapidly, you will get some light popping and orange flame as the rpm comes down.

Good luck with your great project!
Chill31

*edit, looking back at all of the posts, it looks well covered!

Last edited by Chill31; 12-14-2010 at 07:53 AM.