Engine keeps shutting off after AB

[Elefant1301]

Hi,

 

Maybe I am missing something but I recently noticed that the engine kept shutting off after having used the afterburners (when the throttle is back to full dry). I don't remember it behaved this way before...

It is during a custom mission, aircraft armed with RN-28, 4 missiles and SPRD-99 (jettisoned after the take-off).

Did I forget something ?

 

:suspect::suspect:

[Badger1-1]

Maybe too much negative Gs?

[Elefant1301]

Nope, steady attitude.

[yunan4]

I recall reading in the manual somewhere that sudden throttle changes at certain altitudes especially when throttling down out of burners could lead to a engine failure.

[Einherjer]

I have the same thing since the FM update. Often on bombing runs, when I go buster to the target -> whoosh, engine spools down. That makes the situation a little bit hairy, dropping ordnance, evade AAA and reignite the engine :)

[Derbysieger]

It would be easier to help if you would post a track. I didn't run into this problem (yet) and I flew the MiG quite a bit yesterday including some Air-Ground with rockets.

[WinterH]

You may be overspeeding.

[Einherjer]

You may be overspeeding.

 

 

I think so too! Don't get me wrong, I don't think it's an issue, it's just new ;) and I have to watch my IAS

[Elefant1301]

Here is the track.

You'll notice two shut off, one at high speed and the other one at about 700 kph IAS if I remember well.

Please do not comment on the choice of the target, it was just a training on a ghost town...:lol:

 

The first shut off happens after the atomic raid when intercepting the lonely S3 and the second one after the S3 gets destroyed by two RS missiles.

atomic_bomb.trk

[Toxic]

You may be overspeeding.

 

I believe it's overspeeding the engine. If you're on a bombing sortie and go from 5,000meters to 1,000 meters in a matter of a few sec. in buster you're probably going to overspeed it. :)

[Elefant1301]

You'll see, if you use the track file, that I wasn't overspeeding the engine during the second shut off.

[Elefant1301]

It would be easier to help if you would post a track. I didn't run into this problem (yet) and I flew the MiG quite a bit yesterday including some Air-Ground with rockets.

 

Done.

You can see it on page one of this thread.

[Derbysieger]

I'll have a look later ;)

[skendzie]

I just bought this module two days ago so I'm still very new to the Mig-21. But I keep experiencing flameouts too. I don't think I'm overspeeding or making to many extreme maneuvers but I could be wrong. I hope someone can answer OP's question. Maybe I slow down too fast...

[iFoxRomeo]

Elefant, the first flameout was because of overspeed. Not engine overspeed but IAS overspeed. At nearly 1400km/h IAS the flameout happened. 1300km/h is the limit. With the current FM, your alarmbells should ring whenever the nosecone goes beyond 40% at high speed. You had it at 50% at the moment of the flameout.

 

The second flameout was because of G near 0. You were at +/-0G for approx. 5 seconds when the flameout occured.

 

So everything is fine with the MiG-21.

 

Fox

[Elefant1301]

Very informative. Many thanks.:thumbup: