Many engine heads know the exhaust smoke is a good indicator about how the state of an engine is...
If you test run engines in a test bench without the exhaust pipes on the colour of the flames are also a decent way to identify any problems...
My observations of engines i have worked on
idle should be yelow with a blue base
i work with RPM`s not power settings..
at 2800 RPM`s with no load on the engine it should be yelow with a small red base
at 2800 RPM`s with load its a 50/50 yelow and red
at max settings and full work load it should be blue base with red and yelow..
This is what i know from carburator engines...
When a engine works the tempeture will change etc....
Overprimed engines will make a yelow flame, normaly with werry dark grey or black smoke puffs....
But there is more to it.....how well do the oilring scrape the cylinder wall etc....a small ammount of black smoke doing start up can indicate a small ammount of oil left in the cylinder.....thats actualy ok as long it stops when the engine gets to operating tempeture...
Whitesmoke is also ok...again if it stops at operating tempeture
White and blue`ish smoke on startop is a no go....that is both water and oil and thats bad no matter if it stops or not, that is a mixture of oil and water...and that should not happen.....
I personaly dont care about colours, the awsome part for me was the working of each seperate cylinder....that is cool, and that realy give my hope up for the shot up cylinders...German and british plane dont like that, but later on the yanks radials aircooled will love that...we might get the **holy crap i landed on 4 cylinders**
Spits and 109`s wount like loosing cylinders....the 190 will fare abit better on it....man just the ideas about the different things that can go wrong with engine hits....
woooooot!!!
LTbear
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