A newbies impression of the 109 and spit

[Crumpp]

So when a maneuver diagrams have values of negative Specific excess power (Ps) and these are used to compare sustained turn performance and energy bleed rates between 2 aircraft what do you call it ?

Total Energy Concepts for Aircraft Performance

It is a specific methodology for quantifying the potential to maneuver. It was initially conceived by Col. John Boyd. It is standard curriculum for the United States Fighter Pilots in the USAF, USN, and USMC.

I can send you a copy of both John Boyd's original paper and the modern methodology if you like.

Using the terms outside of that system has no meaning. It must sound cool, though.