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

[Richie]

Blueish. Daimlers burn very rich though and burn low grade fuel, 87% octane. Would they still burn that now? They had much lower compression ratios than merlins but they were made that way because the Germans didn't have access to the good fuels that the allies had. Lower compression engines run well...better one low grade fuels than they do on high grade fuels. It's probably why they had such a bigger displacement than Merlins 27 I think and 34 liters. Bigger displacement to get the power.

[Aer9o]

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

Way too small detail to worry about...release the game as it is !

[Oleg Maddox]

I need immediatly to run from office.

Please if you find any materials that to show, read, and you own suggestion - write it here.
I and my guys will read it.

I will be back soon. Hope on Sunday.

[Wutz]

Here is a Merlin engine being started, but one see no flames at all, maybe only visable during night time?

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

[Oleg Maddox]

Originally Posted by Wutz

Here is a Merlin engine being started, but one see no flames at all, maybe only visable during night time?

Here is more sound of prop then of engine really, especially with High RPM.
But thanks for the sample

[klem]

Originally Posted by Oleg Maddox

I need immediatly to run from office.

Please if you find any materials that to show, read, and you own suggestion - write it here.
I and my guys will read it.

I will be back soon. Hope on Sunday.

Try this Oleg

http://www.rogerdarlington.co.uk/Hurricane.html

"Even with the flame shields over the exhaust, I found the flickering blue flames strangely comforting over the water but, once over the French coast, one felt very conspicuous in the night sky". His squadron colleague Morrie Smith makes the same point: "I felt that everyone for miles around could see the exhaust stubs glowing in the night, but the anti-glare cowlings protected the pilot's night vision from this glow".

"As I descended deeper into the cloud, I experienced a frightening phenomenon: the whole inside of the cockpit was lit up by a red glow. My immediate reaction was: 'Fire!' But there was no heat and all my instruments showed everything to be in order, so I ventured to look outside. My two exhaust manifolds were belching out the usual flame, made perhaps a trifle more red and less blue from being throttled back, and this source had illuminated the surrounding very dense cloud. It was an eerie sensation but, once I knew what it was all about, it ceased to trouble me".

Don't forget the glowing stubs

[Skoshi Tiger]

Originally Posted by Oleg Maddox

I need immediatly to run from office.

I often feel like that when I'm at work!

I realy like the way the spitfires suspension reacts in the first video. That little dip of the wing as as the plane turns and comes to a halt. It really gives the impression of inertia and the mass of the aircraft.

Cheers and thanks for the update!

[Flanker35M]

S!

Thank you for the update Nice to see things shaping up. In that DB605 video you can see the root of the flame has reddish/yellow but the tip of it is blueish. Could the British and German difference be that Brits and other allies had carburettors and Germans had direct fuel injection in their DB/Jumo/BMW engines. The mixture in a fuel injected engine, like DB-series, is better than in a carburettor engine and high pressure spray of fuel gives more even fill of the cylinder at the right time compared to the suction in a carburettor system.

Also many nightfighter books I have read state blueish flames on British bombers. And there was a talk witha guy who tuned/maintained DB engines and he said the engine tunes were done in a dark room to see the exhaust flame color to adjust the injection etc. correctly.

Ok, have a good weekend all!

[Jg2001_Rasputin]

Merlin V12 Startup, I see a lot of blue

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

[Oleg Maddox]

Originally Posted by Jg2001_Rasputin

Merlin V12 Startup, I see a lot of blue

Please read with atention: The color of exhaust from the direct pipe and from the extended are different. The temperatue of the flame decreasing with the longer leght of pipe. More lower temperature - more red flame. The most hight is right from the hole without pipe.

As I told above a lot of factors is present in forming of color.