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

[JVM]

Originally Posted by Art-J

Here's a nice night vid with blue flames. Don't know the details of mixture setting, but for such a high RPM run-up we might suppose it was rather on the rich side. On the other hand, no short stacks here, so direct comparison is not possible...


Cheers

Very interesting video! It is interesting to see how at high RPM the flames are definitely blue, even with long pipes, but when each flame appears could it be that for this short time the exhaust pipe itself goes cherry-red/yellow? This would maybe explain what one sees...

JV

[Abbeville-Boy]

Originally Posted by Oleg Maddox

Hi,



2. Effect of exhaust flame at night time. Emulation of each cylinder exhaust in relation to emulation of real engine cylinders work by a program.
My question to community: isn't it too yellow? Maybe to add a bit red color in a mix with yellow? It is tunable really, so I would like to listen suggestions

present color would be OK for a cold engine rich fuel startup. does the color change as engine warms and mixture is leaned?
blue with a pointed white center is optimum

[jameson]

Best vid I could find of MH434 a mkIX spitfire with type 66 Merlin engine. From 5.35 to 6.25:

http://www.youtube.com/watch?v=UDZmq2VrcNQ

Any kind of visible flame on startup is very unusual unless this is due to overpriming of the engine. A spitfire in good condition will start with less than one turn of the prop. They can throw out quite a bit of smoke though for a couple of seconds. See here, a mk1a:

http://www.youtube.com/watch?v=tv4SG...eature=related

[yuxinma2005]

Nice update!

[JG1_Wanderfalke]

I´m so sorry, but engine sound is really awfull
pls pls pls can we have a authentic one.

[ATAG_Dutch]

Originally Posted by JG1_Wanderfalke

I´m so sorry, but engine sound is really awfull
pls pls pls can we have a authentic one.

Please read Mr Maddox's first post. He says it is a 'placeholder'.
The sound is La7 from IL2. I'd know it in my sleep.

[greypeace]

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
Sorry for the double post ,i dont seem to know what I am doing.....

[Seeker]

[QUOTE=Oleg Maddox;203623]Hi,

2. Effect of exhaust flame at night time. Emulation of each cylinder exhaust in relation to emulation of real engine cylinders work by a program.
My question to community: isn't it too yellow? Maybe to add a bit red color in a mix with yellow? It is tunable really, so I would like to listen suggestions


It actually needs some blue, though I know nothing of computer colours, I've run plenty of short pipe four strokes, and yes, petrol burns yellow in a rich mixture, but as the revs increase the combustion cleans up the flame will become blue.

[klem]

Originally Posted by Oleg Maddox

Hi,

I promised to post videos some time.
Here is the first of them.

1. Engine start. Flame and smoke effect. Every start is different (in realtion to emulation of real engine cylinders work by a program).
Sound is currently a place holder. Unfortunately I wasn't able to record in a track at the moment maximal settings (some unpredictable bug in recording of video need to be found and eliminated )

2. Effect of exhaust flame at night time. Emulation of each cylinder exhaust in relation to emulation of real engine cylinders work by a program.
My question to community: isn't it too yellow? Maybe to add a bit red color in a mix with yellow? It is tunable really, so I would like to listen suggestions

I have many airshow daytime films of Hurricanes, Spitfires and the Buchon (merlin-engined) 109 taxying and low passing. There are no flames visible in any of these films. They would often give yellow 'flowers' of flame on startup (see other posts) so your video seems generally correct for daytime conditions except the exhaust gases seem to have too much "thrust" on that initial startup.

[Jaws2002]

Originally Posted by Oleg Maddox

Hi,

2. Effect of exhaust flame at night time. Emulation of each cylinder exhaust in relation to emulation of real engine cylinders work by a program.
My question to community: isn't it too yellow? Maybe to add a bit red color in a mix with yellow? It is tunable really, so I would like to listen suggestions

Since you said you have the colors for the other types of flames, i guess we are only talking about the "yellow" flame.
I think would look better in with a more orange tint. That may also make the greenish reflections a bit more "warm".

Thank you for the update.