AJaromir

There have been added note in change log. So it is not compatibile yet:

In the lastest patch there are new RSBN/PRMG beacons and also new mobile RSBN/PRMG beacon units. Mig-21 used "virtual" beacons that were not on the map but stored directly in the aircraft's code. Is the Mig-21 updated to be compatibile with this new feature?

The INU should not be able to align at high latitude. The greater the latitude, the longer it should take to align the gyrocompass. However, if the latitude is too high (above 60° or similar), it is practically impossible to align the gyrocompass. This mainly applies to mechanical gyrocompasses, which were much less accurate than modern optical ones. However, I also think that this is not simulated in DCS.

If the pylons are culprit, I have no idea how to reproduce tests.

Nice. Seems like I am very close to this. I am looking forward to make the new one.

According to my previous test (before patch 2.9.19.13478 which added WEP switch) I had 396 mph TAS at 20k . I will make new one.

That's correct. If you know this, you can achieve the point when the stall is impossible. Even at 0 airspeed. I call it "decellerated stall"

Yes, I have. Always won against those.

I disagree. When I tried the maximum speed, I got 344 kts (637 km/h) at 20000 ft ( 6096 meters ) From my experience people forget to close engine cowl flaps that makes huge difference in drag.

Actually this is true for most of the existing aircrafts and there is no WWII aircraft for which it would not work like that because all flight controls surfaces are mechanically connected with stick and rudders. Trim tabs works in a way of shifting aerodynamic neutral force position of flight control surfaces, resulting in shifted neutral force position of stick and rudders. The only exception might be aircrafts with fly-by-wire system or aircrafts without trim tabs - aircraft on which the entire rear stabilizer mounting is readjusted. You may see this videos about all kinds of trim systems: Example of mechanism where the whole stabiliser mounting is shifted:

If you are taking off without load and from the very far end of carrier, you probably won't notice. But imagine you have loaded bombs and rockets and half of carrier deck is full of aircrafts. That means much shorter take off area. Don't forget to properly set take-off trim.

Again. Most joysticks are much shorter than real stick which is in aircraft. And this most often is the main issue of player's bad experience.

First of all. I did not use full throttle. At second test I did not use high blower. You can see it in the screenshot. The green line.

Anti Detonation Injection - Its main purpose is to prevent engine knocking ( detonation combustion ) and premature ignition. At low altitudes it has secondary effect of increasing manifold pressure ( cool air = more dense ) Principle is: Water has the highest specific heat capacity of all common substances 4180 J/(kg·K). But that's not the most important thing. The most important thing is that in order for water to turn into steam, it needs an additional 2257 kJ/kg of heat. This allows it to cool the engine much more efficiently than a rich fuel mixture, because aviation fuel has almost half the specific heat capacity of water. In my opinion it is not simulated yet. Because I think there should be "jump" in power at low altitudes, just like in P-47.