Indian Air Force: News & Discussions

[RDXChauhan]

 

[Smoothbore125mm]

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some excellent photos from vayu
ps why is su30 after burner is bluish while others are making red flame

 

[DumbPilot]

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some excellent photos from vayu
ps why is su30 after burner is bluish while others are making red flame
View attachment 253542View attachment 253543View attachment 253544View attachment 253545

This might be something to do with how fuel-rich(stage of the afterburner) the engine is currently burning, or deviations due to the camera settings, because there are also images available when Flankers have an orange-flame in the exhaust while others have a blue flame.

 

[RDXChauhan]

 

[Smoothbore125mm]

View attachment 253555

what the actual hell ?

 

[RDXChauhan]

what the actual hell ?

Must be a demo version, without engines or flight components maybe, ain't no way Chinooks cost 45Lakhs

 

[binayak95]

Must be a demo version, without engines or flight components maybe, ain't no way Chinooks cost 45Lakhs

Model hogi bhai. 45 crore bhi kam hi hai Chinook ke liye.

 

[Smoothbore125mm]

Iconic pics of our MIGS

 

[RDXChauhan]

Iconic pics of our MIGS
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[Smoothbore125mm]

 

[no smoking]

x.com

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some excellent photos from vayu
ps why is su30 after burner is bluish while others are making red flame

That depends on how much fuel is injected into the engine at the time.
Generally, fuel (blue) < fuel (red).
Check this picture:

 

[Smoothbore125mm]

That depends on how much fuel is injected into the engine at the time.
Generally, fuel (blue) < fuel (red).
Check this picture:
View attachment 254062

thanks for the info and that pic is beautiful too

 

[DumbPilot]

That depends on how much fuel is injected into the engine at the time.
Generally, fuel (blue) < fuel (red).
Check this picture:
View attachment 254062

That depends on how much fuel is injected into the engine at the time.
Generally, fuel (blue) < fuel (red).
Check this picture:
View attachment 254062

Now I am curious to see if any document could be found on these AL-31 engines which explains what the reheat process is. Orange means that not all the fuel was utilized, while blue means that most of it was, so does it mean that the AL-31 engines take time to stabilize?


EDIT: I wonder if this staggered activation of the afterburner is to prevent starvation through fuel feed lines, as fuel flow is exponentially increased towards one engine to sustain afterburner, and then the other?

 

[no smoking]

Now I am curious to see if any document could be found on these AL-31 engines which explains what the reheat process is. Orange means that not all the fuel was utilized, while blue means that most of it was, so does it mean that the AL-31 engines take time to stabilize?

No, it means nothing. Different colors mean the engine is in the different working status.

EDIT: I wonder if this staggered activation of the afterburner is to prevent starvation through fuel feed lines, as fuel flow is exponentially increased towards one engine to sustain afterburner, and then the other?

The plane is trying to control the power outputs of the two engines to make different thrusts to turn around.

 

[DumbPilot]

No, it means nothing. Different colors mean the engine is in the different working status.

Yes, you are correct. This is due to the different fuel-air ratio in either engine. The one with the blue flame burns hotter than the one with an orange flame.

The plane is trying to control the power outputs of the two engines to make different thrusts to turn around.

That is incorrect - even if the differential thrust had a lot of magnitude, it would have given the plane a yaw moment, which is not the correct way to turn in this case.

The left engine is not burning completely and I am guessing that in the next few frames, both the engines stabilize to one color as they reach their target air/fuel ratio. Incomplete burning also proves why the engines of planes like MiG-29/that use the RD-33 have an orange flame and are extremely smoky, because on the newer Saturn engines, this problem does not exist:

Here's a series of pictures of the IAF Su-30MKI reaching the target air/fuel ratio in either engine:

(you may notice that the left engine has a brighter flame than the right one)

 

[MirageBlue]

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I so miss the beautiful camoflage schemes and the aggressor markings on our fighters. Plus the squadron markings!

Just look at that beautiful Panthers marking near the cockpit of that MiG-21bis!

 

[MirageBlue]

Must be a demo version, without engines or flight components maybe, ain't no way Chinooks cost 45Lakhs

Model of a Chinook.

 

[Satish Sharma]

That depends on how much fuel is injected into the engine at the time.
Generally, fuel (blue) < fuel (red).
Check this picture:
View attachment 254062

Blue is seen when it is burning efficiently.
I think when full afterburner is not engaged then blue colour is seen mostly..

 

[Haldilal]

Ya'll Nibbiars The 220 Desert Tigers.