Fair warning, I only read this last page here.
Tank-Ace makes a good point, but there's a little more to it.
One on one, HOing is just plain stupid, period. That is, unless you just want to see who will win. There is never any kind of guarantee that you will win, it's always 50/50 that the other guy will get lucky enough to kill you. I'm seeing people rolling dice and then complaining about the outcome. I just don't get it. The object here is to get your guns on him without his guns on you. Why would you want his guns on you? Now if for example you've got 5 guys on you at once then you might as well HO. Odds are you're going to have more than one set of guns pointed at you anyway. Bottom line is, you need to fly in such a way that gets your guns on the enemy without his guns on you. I don't mean that you need to do what Raphael said, remember, you need to get guns on the guy. The only way to do that is get in close, try, die, learn, try, die, learn, repeat a few thousand time, and then they won't be able to touch you.