Requesting help for evasive maneuver.

[Laurwin]

From what I remember Lagg-3 is a little bit outmatched by contemporary German fighters in flight characteristics.
This is very bad thing if you end up in disadvantegous situations. But it still, doesn't mean you should just roll over and surrender.

I recently watched an instruction video about game Falcon 3.0. There was real life American jet fighter pilot giving the lesson. He said, that ultimately being on the defensive is not a very good position to be in, with any aircraft.

There is no single manouver, that you can learn from a rulebook, that always is good, that will always save ur ass when you are defensive. This is because, being defensive is bad thing, in air combat. (1v1)

Guns defenses are for avoiding guns, but they on their own are not some magical manouver which will give you victory (usually). They will buy you TIME (time to live, to survive even a little bit longer)
So in this sense Icefire is correct indeed.

Lagg-3 vs bf109f4. This is not exactly speaking, 1v1, "gentlemen's fight".

Reason is simply that bf109 has so many advantages, and I don't think lagg3 has strictly speaking any advantage except at low altitude turning fight (this is theoretically best engine performance area, for lagg3)

On the other hand, you probably stand a beter chance of defeating bf109, 1v1, when you (lagg-3) have the altitude advantage over bf109 at the start of the fight.

Kill him quickly though, because your probability of winning start lowering with increase in the time (if the fight stays at medium-high altitude where bf109 has biggest performance advantage over lagg-3)
If the bf109 makes mistake, stalling from medium altitude to low altitude, then you can get energy advantage to yourself.

If the bf109 starts making big mistakes (like losing too much energy) then the fight becomes easier for Lagg-3 to win. (because bf-109 is better at energy fighting, because good climb rate, speed and diving characteristic). This means that bf109 is able to regain lost energy back at fast rate, if he actually does choose to regain energy (climb, or fly straight with increasing speed)

But, indeed, Icefire already gave you practical examples. Common mistakes in defensive manouvers is the wrong timing of the manouver (too early, and the enemy predicts your movements and is able to adjust in time).
If the defensive manouver is too late, well then you are probably dead already hehe...

What other defense moves could there be? Some moves not yet mentioned would be simply using full rudder to "skid forward", and scissor at the same time. I suppose, the scissor is almost like a "fake scissor" because you will in reality mainly rely on the skidding of the rudder. This will dramatically slow your own plane, and cause overshoot, if the attacker doesn't realize what is going on. I don't really know how to do it too well myself, embarrassing I know, but maybe Icefire can explain it better (for a fast moving attacker it can sometimes be disorientating enough).

Snap stall is another staple move, but the downside of it is that it robs you of your own energy as well, but if it works, then you get angular advantage, you get behind the enemy's 3-9 line. Then you must simply recover from the snap stall also, at very low altitudes it can be deadly if you don't recover fast enough.

the so-called Hartmann defence I forgot exactly how it is performed, but the intention is to cause an overshoot situation also. This manouver was a real manouver sometimes performed by hartmann and you maybe able to google it.

Well, you should also read the online IL-2 pilot's guide to air combat. Here's a link for free version pdf http://www.virtualpilots.fi/feature/.../inpursuit.pdf