well I realy dont care about spits ut that is for another post.
but will help you with basic understanding of "E". E like in Physics equals Energy. in air combat Energy comes in 2 Primary forms; 1 is stored energy (ALT) others is applied (SPEED). The more alt you have the more E you have stored. thats the primary reason for getting alt. now... you can always trade alt for speed and vice versa. BUT, you get better trade one way then the other. if you are lvl cruising then go into a dive you gain speed but after so much speed gained and alt lost you will not be ale to reclaim the alt as quickly as it was spent.
now for E in combat. think of E as money and your alt and speed are the bank in which its kept. lets make an analogy; you and your opponent are at the same alt/speed (same plane and all) now after merging (passing eachother) he goes into a immelman climb move. you go into a hard bank turn trying to get the fast guns on. he basiclt spent money in a stock that will take some out of ready to spend cash but will be profitable in longer run. you took your money and threw it out the back of the plane. you are now same alt as before but much slower. he is higher and can trade the stock in on cash any time he chooses. so combat piloting is ALOT of stock,intrest,dividends. you have to trade smart.
if that dont help this will... stay high stay fast and make them keep their heads down!