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

[Trumper]

Do these help

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

http://www.youtube.com/watch?v=3arJP...eature=related

7 mins in

http://www.youtube.com/watch?v=k9AGb...eature=related

3 mins in for night time CREDIT TO THE AUTHORS OF THE VIDEOS

[Sutts]

Originally Posted by Trumper

Do these help

7 mins in

3 mins in for night time CREDIT TO THE AUTHORS OF THE VIDEOS

Great videos Trumper. I've put together a few stills from the Just Jane night runup you posted.

When running fast the flames were short and a dull red in colour.
When reduced to an idle the flames were longer and blue in colour.

The red flames flickered but were visible at all times from all exhausts.
The blue flames were intermittent - just ejected every now and then.

None of the flames were bright enough to illuminate the cowlings of the aircraft. This is my experience from a couple of merlin night runs I've witnessed. The only time the aircraft is lit up is when the engine has been overprimed and the full fuel flames are seen pouring out for a few seconds on initial start.

This makes sense since an aircraft lit up to the extent we see in the SoW video would have made a perfect target at night. I know the brightness of the exhausts was a problem at night for pilot vision - in First Light I remember reading that Geoff Wellum couldn't see the runway lights below him at night because strips of metal were attached to the fuselage of his Spit to hide the exhaust outlets from the pilot, partially obscuring his downward vision - he hadn't realised that and thought the runway lights were being switched off every time he flew approach!

[Rodolphe]

...

Originally Posted by Sutts

When running fast the flames were short and a dull red in colour.

The red flames flickered but were visible at all times from all exhausts.

Around 08'00" , note the many glowing burnt fragments in the prop wash of this mighty Lanc confirming the bad combustion (dull red) of that transitionnal and intermediate engine power.

http://www.youtube.com/watch?v=k9AGb...ayer_embedded#

!

...

[SlipBall]

Thanks for the up-date, the grass moving looks cool

[JG52Uther]

Apparently a merlin 45,I don't see any flames:

http://www.youtube.com/watch?v=cv0Onh6NzPA

And another one:

http://www.youtube.com/watch?v=wIpgk-1OfFU

[Romanator21]

Apparently a merlin 45,I don't see any flames

That depends on how it's started. These are not typical, but show flames can occur:





I think the start-up video is ok. If I had one qualm with it, it is that the smoke of that quantity dissipates very quickly. Either the smoke should be much less, or it should hang around longer if it's going to be that big.

Here's an example, but every video shows the same thing:

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

3:05

Regarding exhaust flame at night - I will leave color to the experts. I would like to point out that color doesn't always have to do with temperature. Some flames burn green for instance, or purple. I would also like to say that the ambient light from the exhaust seems too strong. While exhaust flames would have been an important factor in finding your enemy at night, I don't think they would paint the side of an airplane bright yellow (or any color for that matter). The same occurs in IL-2 when firing guns (bright yellow glow on side of plane and in cockpit), which I think is not accurate.

Regarding sounds - even in IL-2 they are good, but one that was missed was speed of sound in air. Explosions a mile away are heard instantly. I hope this feature will be implemented in SoW. Secondly, sounds are modified by air flow. If it's a windy or turbulent day, the drone of an engine is going to fade in and out in a random way, with the degree of rise and fall of volume increasing with distance. Thirdly, low frequencies travel farther than high frequencies. So, when listening to an engine that produces an array of frequencies, you will hear a low drone when it is far, and a higher click-clack buzzing when it is near. I can't decide if this is modeled in IL-2 or not, but I'm throwing it up here anyway.

[Azimech]

Originally Posted by Romanator21

Thirdly, low frequencies travel farther than high frequencies. So, when listening to an engine that produces an array of frequencies, you will hear a low drone when it is far, and a higher click-clack buzzing when it is near. I can't decide if this is modeled in IL-2 or not, but I'm throwing it up here anyway.

It is, but almost impossible to configure. I had this only in 2006, when somehow I had the correct settings. After I reinstalled windows XP and used the same IL2 installation as before, the effect was gone. I've spent hours trying to find the correct setting but no-one can tell me how.


And for exhaust flames, here's something completely different:

http://www.youtube.com/watch?v=5pMHZaMFw9c

[Richie]

Originally Posted by JG52Uther

Apparently a merlin 45,I don't see any flames:

And another one:

Those Merlins have those fancy covers over the six stacks though. You can't really see if it's flaming or not. Come to think of it maybe that's why they're on there.

[Catseye]

Originally Posted by JG52Uther

Apparently a merlin 45,I don't see any flames:

And another one:

Blue flame is practically invisible in daylight.
I've seen pics of formula 1 racing where after a crash, the driver is trying to get away from flames engulphing him - the video does not pick up the blue flames.

I've also seen exhausts burning blue but at the last part of the flame they start to flicker yellow.

Interesting topic. In my mind I'm beginning to rationalize briefly yellow turning to blue as the system heats up but that is purely a guess by me and I'm sure Oleg will have the definitive answer after seeing all the info being brought forward.

[Motokiume]

Yet another video - watch for the colours at approx 30 seconds:

http://www.youtube.com/watch?v=g2gef...eature=related