MiG-21 used to be my favorite ride... can't stand it now

Military jets are not necessarily taken into departed flight regularly (depending on spin characteristics),e.g. https://forums.eagle.ru/showthread.php?t=235829

It's entirely possible that the Mig's out of the envelope behavior is not well documented enough to code a good FM.

Here comes CFD

I've read a lot of pilot stories and I am in contact with a few former Mig-21 pilots from our airforce. I have yet to find anyone who lives and has handled a full departure in Mig-21. Even test pilots never intentionally tried a departure with Mig-21 and it was not a part of a test program of the aircraft. Everyone I talked to and read about mentions that this flight regime was extremely dangerous and not something that one would like to experience during his career.

P.S. Did anyone come up with an explanation why I can steer by using the rudder (no brakes) on the ground with no wind, with as little as 3kts forward speed? Very effective rudder on this MiG-21!

I'd like to know the answer too this mystery too!

Although I think the flight model is good, although it looses speed a lot more in the turns than at release ( I think )

I'd like to know the answer too this mystery too!

 

Although I think the flight model is good, although it looses speed a lot more in the turns than at release ( I think )

I'm testing the turn performance to the real charts, and in some parts of the envelope its a little better than real thing :book:, but still its like an outline of the real graph like half of the time, which tells us that generally simulation is OK. What bothers me is sim graph being unparallel to the real graph in some parts and suggests something looks wrong about the proportion of drag to AOA to IAS(like they couldn't nail the drag law that would be right for the whole envelope and overpowered the engine to compensate but this leads to an aircraft that is not a MiG :hehe:). But Im still not quite sure and continuing the examination :detective:. We have to be precise and legitimate in our complains guys.

As long as i can escape an F5 in stable flight with only 1 wing (F5 did shoot the right wing and it broke off completely), i do not believe that the FM is as it should be :(

(love the MiG anyway)

I'm testing the turn performance to the real charts, and in some parts of the envelope its a little better than real thing :book:, but still its like an outline of the real graph like half of the time, which tells us that generally simulation is OK. What bothers me is sim graph being unparallel to the real graph in some parts and suggests something looks wrong about the proportion of drag to AOA to IAS(like they couldn't nail the drag law that would be right for the whole envelope and overpowered the engine to compensate but this leads to an aircraft that is not a MiG :hehe:). But Im still not quite sure and continuing the examination :detective:. We have to be precise and legitimate in our complains guys.

I'm curious to know how did you get that data? Is there some tool to extract performance data and plot it?

As long as i can escape an F5 in stable flight with only 1 wing (F5 did shoot the right wing and it broke off completely), i do not believe that the FM is as it should be :(

(love the MiG anyway)

That sounds more like an issue of the damage model and is everywhere in DCS, not limited to the Mig21

I'm curious to know how did you get that data? Is there some tool to extract performance data and plot it?

On basic pass - manually. On sustained turn performance, for example, I set altitude, speed, AOA and see how many G's will be on the dial, change speed, see next, write down, plot point to point. For more indepth - TacView has good plotting options. Basically, for any chart, pilot to get an X and see what Y would be.

On basic pass - manually. On sustained turn performance, for example, I set altitude, speed, AOA and see how many G's will be on the dial, change speed, see next, write down, plot point to point. For more indepth - TacView has good plotting options. Basically, for any chart, pilot to get an X and see what Y would be.

Ah interesting! Thanks for that Кош!

That sounds more like an issue of the damage model and is everywhere in DCS, not limited to the Mig21

ok interesting to hear, but i did not experienced this issue with other modules yet.