Is Missile Exhaust Engine Shutdown Simulated?

[KilledAlive]

In a pilot's manual I had found, along with other accounts from jet aircraft other than the 21, that introducing large amounts of missile exhaust into the jet intake can shut down the engine in mid flight. Apprently, it was enough of a danger that the Pilot's manual recommended before firing any missile that the user should flip the Air Relight switch before firing a missile, and immediately switch it off once the aircraft is clear of the exhaust.

 

I doubt that sort of thing is implemented, but it would make for some even hairier dogfights when your offensive weapons are potentially dangerous to yourself.

[Yars]

Form the pilot's manual, this aircraft has engine automatic anti-blowout start system, so you don't need to turn on the air restart circuit breaker(i think you owned the same pilot manual-AIRCRAFT МиГ-21бис Pilot's flight operating instructions, see section 6 Para. 235) This feature is implemented in this module. Right after you fire the missiles, you can observe the engine start warning light is flickering, and you can hear the corresponding sounds of engine starter.

 

 

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[Frederf]

I've never seen any effect on engine run from rocket motors even when motors are launched without anti blowout system running (I think emergency launch doesn't run it). In manuals its even said to run air start system when many rocket motors are present like UB pod or S-24 launches since anti-blowout for AA missiles is not always sufficient.

 

I don't know if air restart switch and anti-blowout process are the same. Start sequence uses stored oxygen to chemically enrich as well as provide electrical spark. Maybe anti-blowout uses only electrical spark and no O2 enrich... or maybe it uses O2 too.

 

The blowout and air start sounds and RPM effects aren't totally realistic. They are reused from ground initial start process.

[Art-J]

I recall having a total flameout some versions ago after launching S-24s, don't remember if anti-blowout function was implemented then already or not. Haven't used them for ages, though, so I don't know if it's still a risk in current version of the game.

[Frederf]

I've never had a launch flameout. It might have been coincidental with a negative/zero G starvation. I notice also the real procedure often fires these rockets at idle throttle. I don't know if that is designed to keep EGT low or otherwise make the engine less susceptible to disruption or if it's just because they are released in a steep dive.

 

If you can find any repeatable condition where rocket/missile launch has a noticeable effect on engine run I'd like to see it.

[Art-J]

I've never had a launch flameout. It might have been coincidental with a negative/zero G starvation. I notice also the real procedure often fires these rockets at idle throttle. I don't know if that is designed to keep EGT low or otherwise make the engine less susceptible to disruption or if it's just because they are released in a steep dive.

 

If you can find any repeatable condition where rocket/missile launch has a noticeable effect on engine run I'd like to see it.

 

Nah, no G starvation, as I was in a shallow dive, straight as an arrow towards the ground target. There was a bit of an uproar on the forum at the same time, as a few other guys suffered from the same thing :). But it could be considered a neat realism touch for the MiG, although a bit annoying.

 

But as I said, don't know if it can still happen in current versions, and using DCS as a strictly civilian sim nowadays, I won't be able to test this aspect thoroughly.