Questions about "Implemented engine destruction due to engine overspeed."

[gnomechild]

In the last patch, there was this item in the notes for the Mirage F1 "Implemented engine destruction due to engine overspeed."

I was curious what this engine destruction was and what the parameters are as I was not able to damage my engine at any airspeed.

The F1 manuals list maximum allowable speeds of 700kts < 20,000ft and 750kts > 20,000 ft. Now, I UNDERSTAND that these airspeeds are precautionary and related to engine life and health and are not "you die" speeds of instant destruction. I am simply asking for clarification for what has been added in DCS. I was able to hop into a mission and fly at max speed, sometimes up to 810kts, with zero negative effects until I ran out of fuel.

Thanks!
 

F1 800kts.trk

[Coragem]

2 hours ago, gnomechild said:

In the last patch, there was this item in the notes for the Mirage F1 "Implemented engine destruction due to engine overspeed."

I was curious what this engine destruction was and what the parameters are as I was not able to damage my engine at any airspeed.

The F1 manuals list maximum allowable speeds of 700kts < 20,000ft and 750kts > 20,000 ft. Now, I UNDERSTAND that these airspeeds are precautionary and related to engine life and health and are not "you die" speeds of instant destruction. I am simply asking for clarification for what has been added in DCS. I was able to hop into a mission and fly at max speed, sometimes up to 810kts, with zero negative effects until I ran out of fuel.

Thanks!
 

F1 800kts.trk 1.62 MB · 0 downloads

I was doing some testing this weekend.

Managed to get to around Mach 1.8 at 24k feet.

On second try managed to get to Mach 2.1 around 29k feet.

On first attempt engine was fine, on second attempt I was getting warning lights near mach 2.1 and engine blew up right after reaching Mach 2.11.null

Considering what i read about the FM here on the forum that sounds correct. but having more information on the engine damage model and limitations would be nice. How long the engine can be keep at 8900 rpm for example.

[gnomechild]

Yeah. The mach limit stuff works well and is clear. And I suppose inlet temperature is obviously a much more serious / immediate problem than RPM. I'm just curious if I'm supposed to be able to fly around at 800kts indefinitely. Not from a FM perspective, I think that's right. I don't expect the manual would tell pilots to not exceed 700/750kts if it wasn't possible due to drag. I just wonder about the engine damage in game cause I have no idea how to actually kill the engine lol

[Coragem]

20 hours ago, gnomechild said:

Yeah. The mach limit stuff works well and is clear. And I suppose inlet temperature is obviously a much more serious / immediate problem than RPM. I'm just curious if I'm supposed to be able to fly around at 800kts indefinitely. Not from a FM perspective, I think that's right. I don't expect the manual would tell pilots to not exceed 700/750kts if it wasn't possible due to drag. I just wonder about the engine damage in game cause I have no idea how to actually kill the engine lol

I managed to get Match 2.25 @ ~36k feet yesterday, From what I tested as long as the engine is within the Limitations chart, it will keep going.
I think the "Implemented engine destruction due to engine overspeed." is working fine since as soon as i´m over the engine limit it will fail now, but i never tested on previews patchs so maybe going over the limits had no concequences before. I can't confirm.

null

[fausete]

Hi! The engine can be destroyed both by excessive inlet air temperature and by excessive RPM (which can be achieved easily through the emergency regulation).

[gnomechild]

8 hours ago, fausete said:

Hi! The engine can be destroyed both by excessive inlet air temperature and by excessive RPM (which can be achieved easily through the emergency regulation).

Hey fausete, thanks for the reply! That's good to know. Is there any plans for failures related to long flight times above maximum allowable airspeed? Or would that mostly just lead to maintenance concerns that aren't relevant in DCS?

[fausete]

Hi, not for slightly exceeding the airspeed limit but you can also damage the nozzle from excessive IAS and will get reduced thrust.

[Criticale2orr]

I have been experiencing the opposite... 25k ft at Mach 1.4 gives me an engine failure. EGT are higher for me then the others, but I have no idea what I am doing differently... 

Attached the track file. Any enlightenment would be appreciated!

1.4enginefailure.trk

[Loukuins]

On 6/8/2024 at 7:31 PM, Criticale2orr said:

I have been experiencing the opposite... 25k ft at Mach 1.4 gives me an engine failure. EGT are higher for me then the others, but I have no idea what I am doing differently... 

Attached the track file. Any enlightenment would be appreciated!

1.4enginefailure.trk 5.72 MB · 0 downloads

Do you exceed 700knots? 25 000ft is very low of such speed and such engine. The engine has some hard limit that you can't go around, the engine need a lot of care

[fausete]

En 8/6/2024 a las 19:31, Criticale2orr dijo:

I have been experiencing the opposite... 25k ft at Mach 1.4 gives me an engine failure. EGT are higher for me then the others, but I have no idea what I am doing differently... 

Attached the track file. Any enlightenment would be appreciated!

1.4enginefailure.trk 5.72 MB · 0 descargas

Hi, the problem is that you didn't connect the automatic shockcone (SOURIS) control. Therefore the engine stalled soon after engaging overspeed mode.

[Criticale2orr]

On 6/8/2024 at 1:31 PM, Criticale2orr said:

I have been experiencing the opposite... 25k ft at Mach 1.4 gives me an engine failure. EGT are higher for me then the others, but I have no idea what I am doing differently... 

Attached the track file. Any enlightenment would be appreciated!

1.4enginefailure.trk 5.72 MB · 0 downloads

Oh lol. I completely forgot about that step . Been awhile since I've flown the module... Thanks for the refresher!