Good advice Soda.
A good way to conserve your E in a pull up is to keep an eye on the G meter. Keep it under 3 G's and you will do a nice gentle pull-up and retain you E very nicely, just as Soda suggests. I usually combine this with a slight roll away from his break, basically leading me into an oblique immelman angled away from his break slightly. This way if he pulls up, he not only has to zoom up behind me, but also haul his nose around more horizontally. In addition, this move sets me up for a barrel roll attack of sorts if he continues the turn. Basically instead of completing the immel, at about a 45 degree climb or more, but before vertical, I roll away from his break, and pull down, rolling right in the dive to align my exit point with where the bogey will be in his turn, and get a deflection shot. This is a tricky move to do properly, and it takes just the right amount of vertical and horizontal separation along with good timing. When you get it right though, it rocks.
This is a move best used in aircraft that roll very well, but don't turn well in relation to the enemy. The P47 and FW are great machines for this move.
There is an even more simple solution to this scenario however. If your plane is even close to the other in terms of turning ability and you only have a slight E advantage, a simple high yoyo is often a better move. Use the vertical to avoid an overshoot and tighten your turn, and I usually drop into lag pursuit at the end of it and then assess the situation. If he continues the break, I will either be able to use further high yoyo's and go into lead for a shot, or I will have to wait for him to break hard and then roll to his blind side and disengage if I've lost the E advantage. However, the high yoyo to follow a break is the most aggresive move at this point. I use this alot, simply because Joe N1k driver normally doesn't expect me to be that aggresive in my P47. In addition, most planes accelerate better than my Jug, so if I wait too long, I'll lose my E advantage. I'm better off to get really aggresive and go for a shot while I still have the E to burn. The trick is realizing when you don't have the advantage anymore, and disengaging before you get killed.
I will always go for the more aggresive move if there are no other bad guys around to threaten me. The only reason you have an E advantage is so that you can burn it at some point for a shot, and an aggresive move early will often get you a kill.
"Here is a fundamental SpecWarrior truth: the three elements most crucial to the success of your operation are, one: surprise, two: speed, and three: violence of action." - Richard Marchinko "Rogue Warrior"
I find that applies pretty well to air combat. Kill by surprise is the best. Failing that, kill quickly before the enemy can react or call for help. The third part, violence of action, I equate to aggressiveness in air combat. If you have three moves you can make, pick the most aggressive one! Don't be suicidal about it, but don't wait for the perfect setup to make the shot. Engage the enemy and attack as soon as possible. Many times violence of action by going very aggresive will win you fights. If you are fighting based on an E advantage that you can't keep forever, be aggressive and kill him or disengage, because time is on his side.
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Sean "Lephturn" Conrad - Aces High Chief Trainer
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