I concur - great intro into aircraft performance. May I clarify: in comparison of A-4M and F-4J E-M diagrams areas where particular aircraft prefer to fight are limited in one section by the line defined by the two dots: intersection of Ps0 lines (max sustained turn rate with no excessive power) and Ps+100 lines (sustained rate with +100 excessive power), correct? Is that because these are the only sustained turned rate lines that intersects (for example sustained rate lines with +200 and higher excessive power for both aircraft do not cross)?