I have found that sometimes reading about lag displacement is alot like the hs yo-yo, with a turn away from the bogey. I have found that what I believe to be a lag displacement roll is a roll away that brings you almost straight behind, or near the bogey's six, with a maintanence of speed or maybe a bit more speed. Which is ideal in that after the bogey pulls a hard turn toward, he is more than likely trying to either rebuild E or sometimes trying to zoom out of a hard turn. I am hoping that this is, in fact, a lag displacement roll, or maybe something that I'm doing and just plain getting lucky.
I will try and put together an idea of what's happening in this maneuver and let you know if this is correct. (I'm in a high thrust/weight ratio fighter, Bf109f4 and bogey the earliest version of the Spit, I think a mk5)
1. Bogey is turning left to 270, trying to turn inside, I'm headed 000.
2. Bogey passes, still heading 270, I roll to the right, away from bogey, and pull down once I reach about 090.
3. Bogey continues 270, I'm now pulling out of my loop and now heading 270 and have a good speed advantage over bogey and now gaining on bogey.
That's as best, and simplest, as I can describe in words. My hands act this out better, of course. Is this a lag displacement roll? At time 1, I could opt for a high deflection shot and try to turn with the Spit, but with the F4, I have found that this just makes the engagement longer and gives the Spit somemore options for maneuvering.
Also, at time 2, I'm in a bad position because I've lost sight of the bogey until I pull up to meet his six. This is why I dont think it's a lag displacement. And this loss of sight is sometimes a hair-raiser in that sometimes the bogey won't play by my rules and does something really out of the ordinary. hehe.
I hope this is understandable, as it is really a simple maneuver, that doesnt bleed much of my E away, and I usually try to keep speed up, at or nearly to 400kph. Never engaging below 350kph, unless I'm in a real good position and situation.
Thanks for all the help, I'm reading "Fighter Combat,"by Shaw and am in the section of maneuvering: dissimilar a/c. This is a great book to really focus in and try to understand without misinterpretation.
-Quasar