Is it normal engine off during flights so often ?

[karasinicoff]

So many times engine flame off and need to restart in the air.

I aware about it and try to avoid but there are too many reasons and it is not easy to control in battle field.

I dont know about the real air craft but it is just not right. Too often the engine gone off every flight.

Any chance to check it up and may be make it less? I understand it is simulator but if that so I dont think no one survided on MiG 21 so far.

Please?

 

[razo+r]

How the hell are you flying? The only ways I know how you can provoke an inflight shutdown is if you fly longer with less than 0G, roll a long time or mishandle the engine. And in that sense I never had any inflight shutdowns on my last hundreds of flights. 

Have you checked that you are not pushing the throttle to idle cutoff inflight? Can you give us a short track perhaps as an example? 

[karasinicoff]

It happens almost every time I climb up about 20 degree and go to level flight.

Or start heading down for bombing from high altitude.

Too many times in various situation so I dunno exact. try to avoid negative G or sudden moves but still happens.

 

[Art-J]

I recall staying at about 0 g cuts off the engine much faster than negative g, especially with afterburner. So either push stick more to go through 0 as fast as possible (but not stay negative for too long obviously) or even better rely on using half rolls more often.

[MiG21bisFishbedL]

You could be overspeeding the engine. The MiG-21's intake can't handle more than mach 2.1 or 1,300km/h, whichever comes first. At that speed, the ducting can't slow the airflow to subsonic speeds and it'll flame out.

EDIT: Forgot to add "which ever comes first" which is pretty important to learn.

Edited June 2, 2024 by MiG21bisFishbedL

[Buzzles]

On 6/1/2024 at 6:31 AM, karasinicoff said:

It happens almost every time I climb up about 20 degree and go to level flight.

Or start heading down for bombing from high altitude.

Too many times in various situation so I dunno exact. try to avoid negative G or sudden moves but still happens.

 

Mig-21 really doesn't like anything less than +1g due to the fuel pumps. Check the manual for the exact figures, but it's only a few seconds at 0g and 5-10s at negative iirc before fuel starvation and engine flameout.

If you're levelling out from a 20 degree climb, easiest to roll upside down and then pull until level to keep positive g then roll back upright. Alternatively just nose down fairly hard, going past the horizon quickly, then gently pull back to level out.