MiG-21bis engine WEP mode

[tiopilotos 2,504]

It is known that MiG-21bis operates R-25 engine which introduces an emergency high thrust operation mode. This mode produces about 96.5 KN (22.000 lbs) of thrust and almost matches the french M53-P2 engine which was introduced almost a decade later! I was wondering if we can introduce this feature. Enabling this mode even for short periods of seconds during a close dogfight, MiG-21bis will be transformed to a very challenging opponent especially when armed with R-13M/R-60K missiles. This mode should have a time limit cause the thermal stress being produced by this mode overheats the engine and extended use may cause engine explosion. 

[MigBuster 2,861]

I think it may have already been incorporated or was being worked on years back into some mods remember the discussion.

It isn't 22,000 lbs because that is the figure for Emergency thrust at sea level flying at Mach 1 (as stated in the manual).

 

MiG-21bis with R25-300

Static max AB output  = 6850 kgf

Static Emergency / second reheat = 7100 kgf

 

 

 

 

 

 

 

 

[+Cliff7600 1,120]

Hi

Flogger23 has some MiG-21 in development and I know there's something to reproduce this feature (I did it lol )
with overheating and engine explosion when used for too long.

[UllyB 1,204]

On 2/7/2023 at 2:12 PM, tiopilotos said:

It is known that MiG-21bis operates R-25 engine which introduces an emergency high thrust operation mode. This mode produces about 96.5 KN (22.000 lbs) of thrust and almost matches the french M53-P2 engine which was introduced almost a decade later! I was wondering if we can introduce this feature. Enabling this mode even for short periods of seconds during a close dogfight, MiG-21bis will be transformed to a very challenging opponent especially when armed with R-13M/R-60K missiles. This mode should have a time limit cause the thermal stress being produced by this mode overheats the engine and extended use may cause engine explosion. 

And how one can simulate that ?

[tiopilotos 2,504]

On 8/2/2023 at 6:57 PM, UllyB said:

And how one can simulate that ?

This is what exactly I ask!

[UllyB 1,204]

3 hours ago, tiopilotos said:

This is what exactly I ask!

Oh, I see. It seems that I missunderstood your first message. My apology Sir.

[tiopilotos 2,504]

It's OK we just need to edit the MIG-21BIS.DATA to introduce this feature. If someone has experience with modding engines, you're welcome!

[+Gepard 10,264]

I think you cant include the emergency mode into the data.ini.

[tiopilotos 2,504]

3 hours ago, Gepard said:

I think you cant include the emergency mode into the data.ini.

I'm not the expert here... Why do you think it's not possible?

[+Gepard 10,264]

We have only entries for Cruise, Mil and Afterburn. A forth value is missing.

Maybe i'm wrong, but i dont see a way.

[+Coupi 4,279]

Just to say... and adding a sort of  "fake engine" with specific entries ? 

Edit : time is missing to test but I think we could start from the example of the F-86H propulsion data.

Edited February 13, 2023 by Coupi

[+Cliff7600 1,120]

Well, I think I can show you an example with a little hot-rod I made for fun

Throttle at 99%

Throttle at 100%

It doesn't really give an advantage when dogfighting but it sure helps to runaway in a "F-104 style".
The good thing is the wingmen use it all the time.

[Wrench 9,461]

Like Coupi said above, try looking at the F-86E/F/H engine sections. Fubar did a kind of 'fake engine' for the extra power thingy.

[UllyB 1,204]

9 hours ago, Cliff7600 said:

Well, I think I can show you an example with a little hot-rod I made for fun

Throttle at 99%

Throttle at 100%

It doesn't really give an advantage when dogfighting but it sure helps to runaway in a "F-104 style".
The good thing is the wingmen use it all the time.

 

What aircraft is that if I may ask ?

 

[+Cliff7600 1,120]

3 minutes ago, UllyB said:

What aircraft is that

It's a not serious mod I made from the very good MiG-Ye8ML made by Logan4 and available in the download section, in this pack :

 

[UllyB 1,204]

Just now, Cliff7600 said:

It's a not serious mod I made from the very good MiG-Ye8ML made by Logan4 and available in the download section, in this pack :

 

Thx a lot, I like it.