E is not just speed. what we all need to be clear on, and biggles' main point highlights it, is that a Split-S does infact waste Energy. It gains speed but throws away altitude, in short. now what biggles is describing is not blowing E at all, but using every last horse in the little hurri2c to provide a shot oppertunity and possibly enough to scre the P51 away for 2 mins.
now the flip side of this, in my mind, is that infact a Split S will gain you an Energy Adantage if, and only if the P51 banks round hard and follows you down.
lets say the P51's first pass was co altitude, at around 400mph, the hurricane at 270mph flying level untill the moment when the spit S was forced to avoid being shot. that is a last minute evasive, no matter if planned or on reflex. should the p51 bank hard and try to follow you down, the average pilot at 400mph will probably burn down to 300mph easily before diving after the hurri, who is now going 300 mph also in a steep dive, giving chances for reversals, snapshot, scissors, whatever, untill the pony figures hes in trouble and runs along, which wouldnt be difficult unless he really commited to turn fight.
So, yes the split S has given you an E advantage by the errors of the opposition.
now, if i am correct, what biggles is suggesting is to start exactly the same cycle for the first pass. the pony and hurri co-alt again, pony is 3.0k behind at 400mph and the 270mph hurri starts a shallow dives up to 300mph, the P51 follows gaining even more speed.
right as the dive acceleration on the hurricane maxes out, preferably you would time this for the moment the p51 lines up his shot at 500yrds, is the moment to pull your move and make a shot.
why waste time draggin the pony lower in the split-s unless its a last minute evasive when you can just as easily do the same moves from a 'give yer tail' tail merge.
amazing how many fast plane flyers will **** up on the first attack if you bait them right from 6.0k icon range. not nearly so many will make a mistake on the second attack.
S!