Energy Maneuverability

[Robo.]

Originally Posted by JG14_Josf

The other curves are Sustained Turn Performance curves or Specific Excess Power at 0, or Ps=0 whereby the plane is not gaining or losing any energy while it is on that line at those speeds, those g loads, and that line is a turn at those speeds, full power, where the pilot is flying a plane in a turn not gaining or losing altitude and the far right point is Top Speed and as soon as the pilot starts turning in a level turn a new plot is added to the line and the pilot could stay at that plot with a very wide turn not gaining and not losing altitude, and the pilot can tighten the turn and make a new plot, not gaining altitude, not losing altitude, not accelerating, not decelerating, flying at that bank angle, full throttle, coordinated turn, full power, and if the bank angle is moved even steeper, and steeper, maintaining level flight, the end result is a stall and that is the far left point on that lower curve which is The Sustained Turn Performance Envelope, and notice, please, how the Mig is much better at Sustained Turns compared to the F-86 except if both planes are turning a Sustained Turn at speeds above .7 Mach at which time the F-86 can out turn the Mig if the Mig pilot tried to follow at that airspeed (but the Mig can just cut the turn).

Very well, we had this very conversation just couple of weeks ago, doghouse of Spitfire Mk.I and Bf 109E. The last bit in the brackets is what forum user Crumpp failed to understand. He is now unfortunately banned from the forums so he can not add anything to that discussion.

It was established though that the speed at which the 109 gains upper hand in sustained turn parameter is 400kph (equivalent of those 0.7mach in the Sabre vs. MiG graph).

Would you would mind going back to my posts and answer my questions taht would be greatly appreciated. I went long distance (literally lol) reading your posts and replying in detail.