Friday 2010-12-10 Dev. video update and Discussion

Thor, I used the 50/50 expression cos you mentioned "half and half", sorry, nothing really technical there

I have a fair experience with aviation piston engines (I was lucky enough to fiddle with 2 strokes and 4 strokes Rotax, Gypsy Major, Continental, Lycoming, P&W Wasp and lately I started to get acquainted with the RR Packard Merlin), but I am no engineer or techie, I am just a flier who's interested in knowing what's happening under the bonnet in front of his nose..

I am not entering in the merits of lambdas or mixture ratios because they're peculiar to the engines and aeroplanes (and as you said 100 posts wouldn't be enough), all I can tell you though is that yes, in theory a direct injected engine like the DB could be more "mixture efficient", although carb engines are handled according to strict parameters, so you would hardly notice any difference in the flames colouring.. if Oleg managed to implement a flame colour changing according to mixture values then this would be a boomer, cos we'd be able to adjust our mixtures by looking at the exhausts and might also be able do diagnose engine problems (i.e. red exhaust flames and sparks coming out would mean a bad, bad day.. or in case of radial engines, where the exhausts are normally connected via a ring exhaust, an intermittent flame from the main exhaust would mean misfiring cylinders etc..).

Come on Oleg, this is quality material we're delivering you here!

[Oleg Maddox]

Originally Posted by Sternjaeger

if Oleg managed to implement a flame colour changing according to mixture values then this would be a boomer, cos we'd be able to adjust our mixtures by looking at the exhausts and might also be able do diagnose engine problems (i.e. red exhaust flames and sparks coming out would mean a bad, bad day.. or in case of radial engines, where the exhausts are normally connected via a ring exhaust, an intermittent flame from the main exhaust would mean misfiring cylinders etc..).

Come on Oleg, this is quality material we're delivering you here!

It is our target. Will be or not - we will see. We have a lot of such branched targets that should be done. Some are hight priority, some - not due to time that it may cost.

Originally Posted by Oleg Maddox

It is our target. Will be or not - we will see. We have a lot of such branched targets that should be done. Some are hight priority, some - not due to time that it may cost.

Oleg, dear old friend Oleg, if your next project was to put wings on a lawnmower I would still buy it!
You guys at Maddox delivered quality, and I know you won't ever let us down, keep up the good work guys!

[ATAG_Dutch]

Originally Posted by Oleg Maddox

It is our target. Will be or not - we will see. We have a lot of such branched targets that should be done. Some are hight priority, some - not due to time that it may cost.

Sorry Mr Maddox, but does that mean that you'll take the members advice and make exhaust flames blue?
As there is no evidence at all for yellow flames?
Thanks.

[WTE_Galway]

Originally Posted by Dutch_851

Sorry Mr Maddox, but does that mean that you'll take the members advice and make exhaust flames blue?
As there is no evidence at all for yellow flames?
Thanks.

How did you get that?

The reply you quoted was related to a question about modeling individual cylinders in an engine to get authentic simulation of misfires etc .

[ATAG_Dutch]

Originally Posted by WTE_Galway

How did you get that?

The reply you quoted was related to a question about modeling individual cylinders in an engine to get authentic simulation of misfires etc .

Precisely. Discussion was invited regarding flame colour being too yellow in the shot. Everyone says 'should be blue'. We don't as yet appear to have a response to this.

Originally Posted by Dutch_851

Precisely. Discussion was invited regarding flame colour being too yellow in the shot. Everyone says 'should be blue'. We don't as yet appear to have a response to this.

..erm, what kind of response do you need exactly? From Oleg?

[Baron]

Originally Posted by Sternjaeger

..erm, what kind of response do you need exactly? From Oleg?

Was kind of the point of this update, oleg asked a question, a majority of posters awnsered another q (that was never asked btw) instead and we havent seen him since.(exept for a few posts by oleg in the beginning)

[WTE_Galway]

Originally Posted by Dutch_851

Precisely. Discussion was invited regarding flame colour being too yellow in the shot. Everyone says 'should be blue'. We don't as yet appear to have a response to this.

lots of response

the consensus was:

- yellow when its a stack fire from over priming (priming pumps raw fuel into the inlets) and

- blue in a running engine though you wouldn't normally see the blue in daylight


though there was some confusion between overpriming flames and a running engine followed by a lot of interesting but off topic stuff about fuel mixtures

[ATAG_Dutch]

Originally Posted by WTE_Galway

the consensus was:

- yellow when its a stack fire from over priming (priming pumps raw fuel into the inlets) and

- blue in a running engine though you wouldn't normally see the blue in daylight


though there was some confusion between overpriming flames and a running engine followed by a lot of interesting but off topic stuff about fuel mixtures

Yes indeed and I agree with the consensus.

My point was that Mr Maddox responded directly to the very interesting but slightly off topic post from Sternjaeger about different colours for different mixtures as being a target for the future.

If different colours for different mixtures is a target for the future, the inference is that yellow, with or without a little more red, is currently the default colour for all mixture settings.